共用题干
Black Holes
Most scientists agree that black holes exist but are nearly impossible to locate.A black hole
in the universe is not a solid object, like a planet, but it is shaped like a sphere（球体）.
Astronomers（天文学家）think that at the center of a black hole there is a single point in space
with infinite（无限的）density（稠密）.This single point is called a singularity（奇点）.If the
singularity theory is correct,it means that when a massive star collapses,all the material in it
disappears into the singularity.The center of a black hole would not really be a hole at all,but
an infinitely dense point.Anything that crosses the black hole is pulled in by its great gravity.
Although black holes do exist,they are difficult to observe.These are the reasons.
No light or anything else comes out of black holes.As a result,they are invisible to a telescope.
In astronomical terms,black holes are truly tiny.For example,a black hole formed by the collapse of a giant star would have an event horizon（视界）only 18 miles across.
The nearest black holes would be dozens of light years away from Earth.One light
year is about 6 trillion（万亿）miles. Even the most powerful telescopes could not pick out
an object so small at such a great distance.
In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are
still answers to be found,however,so black holes remain one of the mysteries of the universe.
The center of a black hole is empty.
A:Right
B:Wrong
C:Not mentioned
Black Holes
Most scientists agree that black holes exist but are nearly impossible to locate.A black hole
in the universe is not a solid object, like a planet, but it is shaped like a sphere（球体）.
Astronomers（天文学家）think that at the center of a black hole there is a single point in space
with infinite（无限的）density（稠密）.This single point is called a singularity（奇点）.If the
singularity theory is correct,it means that when a massive star collapses,all the material in it
disappears into the singularity.The center of a black hole would not really be a hole at all,but
an infinitely dense point.Anything that crosses the black hole is pulled in by its great gravity.
Although black holes do exist,they are difficult to observe.These are the reasons.
No light or anything else comes out of black holes.As a result,they are invisible to a telescope.
In astronomical terms,black holes are truly tiny.For example,a black hole formed by the collapse of a giant star would have an event horizon（视界）only 18 miles across.
The nearest black holes would be dozens of light years away from Earth.One light
year is about 6 trillion（万亿）miles. Even the most powerful telescopes could not pick out
an object so small at such a great distance.
In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are
still answers to be found,however,so black holes remain one of the mysteries of the universe.
The center of a black hole is empty.
A:Right
B:Wrong
C:Not mentioned
共用题干
The iPad
1 The iPad is a tablet computer（平板电脑）designed and developed by Apple. It is par-ticularly marketed as a platform for audio and visual media such as books,periodicals（期刊）,movies,music,and games,as well as web content. At about 1 .5 pounds(680 grams), its size and weight are between those of most contemporary smartphones and laptop comput-ers.Apple released the iPad in April 2010,and sold 3 million of the devices in 80 days.
2 The iPad runs the same operating system as iPod Touch and iPhone. It can run its own applications as well as ones developed for iPhone. Without modification,it will only run pro-grams approved by Apple and distributed via its online store.
3 Like iPhone and iPod Touch,the iPad is controlled by a multitouch display一a break from most previous tablet computers, which uses a pressure-triggered stylus（触控笔）.The iPad uses a Wi-Fi data connection to browse（浏览）the Internet, load and stream media, and install software. Some models also have a 3G wireless data connection which can connect to GSM 3G data networks. The devices is managed and synchronized（同步）by iTunes on a per-sonal computer via USB cable.
4 An iPad has different features and applications one can use to execute different and in-teresting things. There are lots of iPad applications that the owner can use to enhance the way they communicate. Some of these are how to use social networking sites and other online options.One of the most common uses is for e-mail services. iPad applications like Markdown Mail allow the adoption of specific and particular options. They enable the owner to personal-ize their email accounts.
5 While the iPad is mostly used by consumers it also has been taken up by business us-ers. Some companies are adopting iPads in their business offices by distributing or making available iPads to employees.Examples of uses in the workplace include lawyers responding to clients,medical professionals accessing health records during patient exams,and manag-ers approving employee requests.A survey by Frost Sullivan shows that iPad usage in work-places is linked to the goals of increased employees productivity,reduced paperwork,and in-creased revenue.
The iPad will only run programs approved by Apple if not______.
A: modified
B: increased
C: personalized
D: browsed
E: distributed
F: released
The iPad
1 The iPad is a tablet computer（平板电脑）designed and developed by Apple. It is par-ticularly marketed as a platform for audio and visual media such as books,periodicals（期刊）,movies,music,and games,as well as web content. At about 1 .5 pounds(680 grams), its size and weight are between those of most contemporary smartphones and laptop comput-ers.Apple released the iPad in April 2010,and sold 3 million of the devices in 80 days.
2 The iPad runs the same operating system as iPod Touch and iPhone. It can run its own applications as well as ones developed for iPhone. Without modification,it will only run pro-grams approved by Apple and distributed via its online store.
3 Like iPhone and iPod Touch,the iPad is controlled by a multitouch display一a break from most previous tablet computers, which uses a pressure-triggered stylus（触控笔）.The iPad uses a Wi-Fi data connection to browse（浏览）the Internet, load and stream media, and install software. Some models also have a 3G wireless data connection which can connect to GSM 3G data networks. The devices is managed and synchronized（同步）by iTunes on a per-sonal computer via USB cable.
4 An iPad has different features and applications one can use to execute different and in-teresting things. There are lots of iPad applications that the owner can use to enhance the way they communicate. Some of these are how to use social networking sites and other online options.One of the most common uses is for e-mail services. iPad applications like Markdown Mail allow the adoption of specific and particular options. They enable the owner to personal-ize their email accounts.
5 While the iPad is mostly used by consumers it also has been taken up by business us-ers. Some companies are adopting iPads in their business offices by distributing or making available iPads to employees.Examples of uses in the workplace include lawyers responding to clients,medical professionals accessing health records during patient exams,and manag-ers approving employee requests.A survey by Frost Sullivan shows that iPad usage in work-places is linked to the goals of increased employees productivity,reduced paperwork,and in-creased revenue.
The iPad will only run programs approved by Apple if not______.
A: modified
B: increased
C: personalized
D: browsed
E: distributed
F: released
共用题干
The World's Best-Selling Medicine
Since ancient times,people all over the world have used willow to stop pain. The willow tree contains salicylic acid（水杨酸）.This stops pain, but there is one problem. Salicylic acid also hurts the stomach. In 1853,a French scientist made a mixture from willow that did not hurt the stomach.
However,his mixture was difficult to make,and he did not try to produce or sell it.
In 1897,in Germany,Felix Hoffmann also made a mixture with salicylic acid. He tried it himself first and then gave it to his father because his father was old and in a lot of pain.
His father's pain went away,and the mixture did not hurt his stomach.
Hoffmann worked for Bayer,a German company. He showed his new drug to his manager,who tested the drug and found that it worked well.Bayer decided to make the drug.
They called it aspirin and put the Bayer name on every pill.
Aspirin was an immediate success. Almost everyone has pain of some kind,so aspirin answered a true need. Aspirin was cheap,easy to take,and effective. It also lowered fevers.
Aspirin was a wonder drug.
At first,Bayer sold the drug through doctors,who then sold it to their patients. In 1915,the company started to sell aspirin in drugstores.In the United States,Bayer had a patent（专利权）on the drug. Other companies could make similar products and sell them in other countries,but only bayer could make and sell aspirin in the United States.In time,Bayer could no longer own the name aspirin in the United States. Other companies could make it there,too.However,Bayer aspirin was the most well known,and for many years,it was the market leader.
By the 1950s,new painkillers were on the market. Aspirin was no longer the only way to treat pain and reduce fever. Bayer and other companies looked for other drugs to make.However,in the l970s they got a surprise. Doctors noticed that patients who were taking aspirin had fewer heart attacks than other people. A British researcher named John Vane found the reason aspirin helped to prevent heart attacks.In 1982,he won the Nobel prize for his research. Doctors started to tell some of their patients to take aspirin every day to prevent heart attacks.It has made life better for the many people who take it. It has also made a lot of mon-ey for companies like Bayer that produce and sell it!
Why was Felix Hoffmann looking for a painkiller?
A: His company told him to do that.
B: His father was in pain.
C: He wanted to make a lot of money.
D: He suffered from headache.
The World's Best-Selling Medicine
Since ancient times,people all over the world have used willow to stop pain. The willow tree contains salicylic acid（水杨酸）.This stops pain, but there is one problem. Salicylic acid also hurts the stomach. In 1853,a French scientist made a mixture from willow that did not hurt the stomach.
However,his mixture was difficult to make,and he did not try to produce or sell it.
In 1897,in Germany,Felix Hoffmann also made a mixture with salicylic acid. He tried it himself first and then gave it to his father because his father was old and in a lot of pain.
His father's pain went away,and the mixture did not hurt his stomach.
Hoffmann worked for Bayer,a German company. He showed his new drug to his manager,who tested the drug and found that it worked well.Bayer decided to make the drug.
They called it aspirin and put the Bayer name on every pill.
Aspirin was an immediate success. Almost everyone has pain of some kind,so aspirin answered a true need. Aspirin was cheap,easy to take,and effective. It also lowered fevers.
Aspirin was a wonder drug.
At first,Bayer sold the drug through doctors,who then sold it to their patients. In 1915,the company started to sell aspirin in drugstores.In the United States,Bayer had a patent（专利权）on the drug. Other companies could make similar products and sell them in other countries,but only bayer could make and sell aspirin in the United States.In time,Bayer could no longer own the name aspirin in the United States. Other companies could make it there,too.However,Bayer aspirin was the most well known,and for many years,it was the market leader.
By the 1950s,new painkillers were on the market. Aspirin was no longer the only way to treat pain and reduce fever. Bayer and other companies looked for other drugs to make.However,in the l970s they got a surprise. Doctors noticed that patients who were taking aspirin had fewer heart attacks than other people. A British researcher named John Vane found the reason aspirin helped to prevent heart attacks.In 1982,he won the Nobel prize for his research. Doctors started to tell some of their patients to take aspirin every day to prevent heart attacks.It has made life better for the many people who take it. It has also made a lot of mon-ey for companies like Bayer that produce and sell it!
Why was Felix Hoffmann looking for a painkiller?
A: His company told him to do that.
B: His father was in pain.
C: He wanted to make a lot of money.
D: He suffered from headache.
共用题干
Electromagnetic Energy
1 White light seems to be a combination of all colors.The energy that comes from a source of light is
not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
warmth and sunburn are examples of electromagnetic energy.
2 The sun is 93 million miles away from the earth.Yet we can use energy from the sun because elec-
tromagnetic energy travels through space.
3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals
travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light
have more energy than waves of radio , television , or radar. Ultraviolet rays（紫外线）and X-rays are electro-
magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
through solid objects.They can be used to detect and treat cancer. X-rays are used in industry to find hidden
cracks in metal,and in medicine to reveal broken bones.
4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but
the energy stored in coal came from the sun,too.
5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
the.sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the
theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
（电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
tncity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
methods of obtaining and using energy.
Visible light that produces warmth is an example of______________.
A:electromagnetic energy
B:electromagnetic energy travels through space
C:came from the sun
D:when a change in the nucleus of an atom takes place
E:when the sunrays are fierce
F:chemical energy is generated
Electromagnetic Energy
1 White light seems to be a combination of all colors.The energy that comes from a source of light is
not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy
day it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce
warmth and sunburn are examples of electromagnetic energy.
2 The sun is 93 million miles away from the earth.Yet we can use energy from the sun because elec-
tromagnetic energy travels through space.
3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals
travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an
electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light
have more energy than waves of radio , television , or radar. Ultraviolet rays（紫外线）and X-rays are electro-
magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating
buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is
useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right
through solid objects.They can be used to detect and treat cancer. X-rays are used in industry to find hidden
cracks in metal,and in medicine to reveal broken bones.
4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the
sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is
trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but
the energy stored in coal came from the sun,too.
5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If
the.sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with
electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the
theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron
（电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-
cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that
the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.
6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-
tncity.It is also being used to operate engines in large ships.Scientists continue to seek new and better
methods of obtaining and using energy.
Visible light that produces warmth is an example of______________.
A:electromagnetic energy
B:electromagnetic energy travels through space
C:came from the sun
D:when a change in the nucleus of an atom takes place
E:when the sunrays are fierce
F:chemical energy is generated
共用题干
第二篇
Good Table Manners
Manners play an important part in making a favorable impression at the dinner table.
Here are some general rules:
Napkin（餐巾）use
The meal begins when the host unfolds his or her napkin.This is your signal to do the s
ame,so place your napkin on your lap.Unfold it completely if it is a small napkin,or in
half , lengthwise（纵向地）,if it is a large dinner napkin.
If you need to leave the table during the meal,place your napkin on your chair as a
signal to your server that you will be returning.Once the meal is over,place your napkin
neatly on the table to the right of your dinner plate.Do not refold it.
Use a napkin only for your mouth.Never use it for your nose,face or forehead.
Use of utensils（餐具）
Start with the knife,fork or spoon furthest from your plate,and work your way in,using
one utensi!for each course.
If soup is served,remember to spoon away from yourself.This helps stop the drips.
Do not put the entire soup spoon in your mouth.Instead,fill a soup spoon about 75 percent
with soup,and sip（吸饮）it from the side noiselessly.
After finishing dinner,place the尽nife and fork parallel to one another across the plate with the knife blade facing inward toward the plate.
Using your fingers
Here's a list of finger foods:sandwiches,cookies,small fruits or berries with stems,
French fries and potato chips,and hamburgers.
Chew（咀嚼）with your mouth closed don't make noise;don't talk with your mouth
full.
Bread must be broken with your hands. Itis never cut with a knife.
Don't pick something out of your teeth.Instead,excuse yourself to have both hands
above the table at the same time.
Do not put bones or anything else on the table.Things that are not eaten should be put
on your plate.
Which of the following shows good table manners?
A:Talking with your mouth fu!1.
B:Putting bones on your plate.
C:Putting your elbows on the table.
D:Chewing with your month open.
第二篇
Good Table Manners
Manners play an important part in making a favorable impression at the dinner table.
Here are some general rules:
Napkin（餐巾）use
The meal begins when the host unfolds his or her napkin.This is your signal to do the s
ame,so place your napkin on your lap.Unfold it completely if it is a small napkin,or in
half , lengthwise（纵向地）,if it is a large dinner napkin.
If you need to leave the table during the meal,place your napkin on your chair as a
signal to your server that you will be returning.Once the meal is over,place your napkin
neatly on the table to the right of your dinner plate.Do not refold it.
Use a napkin only for your mouth.Never use it for your nose,face or forehead.
Use of utensils（餐具）
Start with the knife,fork or spoon furthest from your plate,and work your way in,using
one utensi!for each course.
If soup is served,remember to spoon away from yourself.This helps stop the drips.
Do not put the entire soup spoon in your mouth.Instead,fill a soup spoon about 75 percent
with soup,and sip（吸饮）it from the side noiselessly.
After finishing dinner,place the尽nife and fork parallel to one another across the plate with the knife blade facing inward toward the plate.
Using your fingers
Here's a list of finger foods:sandwiches,cookies,small fruits or berries with stems,
French fries and potato chips,and hamburgers.
Chew（咀嚼）with your mouth closed don't make noise;don't talk with your mouth
full.
Bread must be broken with your hands. Itis never cut with a knife.
Don't pick something out of your teeth.Instead,excuse yourself to have both hands
above the table at the same time.
Do not put bones or anything else on the table.Things that are not eaten should be put
on your plate.
Which of the following shows good table manners?
A:Talking with your mouth fu!1.
B:Putting bones on your plate.
C:Putting your elbows on the table.
D:Chewing with your month open.
I think￡7 a drink is a bit steep,don't you?
A: tight
B: low
C: cheap
D: high
A: tight
B: low
C: cheap
D: high
She can be relied on in a crisis.
A:looked after
B:depended on
C:believed in
D:turned on
A:looked after
B:depended on
C:believed in
D:turned on
Michael is now merely a good friend,
A:largely
B:barely
C:just
D:rarely
A:largely
B:barely
C:just
D:rarely
Eat Healthy 【健康饮食】
"Clean your plate!" and "Be a member of the clean-plate club!" Just about every kid in the US has heard this from a parent or grandparent. Often, it's accompanied by an appeal: "Just think about those starving orphans in Africa!" Sure, we should be grateful for every bite of food. Unfortunately, many people in the US take too many bites. Instead of staying "clean the plate", perhaps we should save some food for tomorrow.
According to news reports, US restaurants are partly to blame for the growing bellies. A waiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government, according to a USA Today story. Americans traditionally associate quantity with value and most restaurants try to give them that. They prefer to have customers complain about too much food rather than too little.
Barbara Rolls, a nutrition professor at Pennsylvania State University, told USA Today that restaurant portion sizes began to grow in the 1970s, the same time that the American waistline began to expand.
Health experts have tried to get many restaurants to serve smaller portions. Now, apparently, some customers are calling for this too. The restaurant industry trade magazine QSR reported last month that 57 percent of more than 4,000 people surveyed believe restaurants serve portions that are too large; 23 percent had no opinion; 20 percent disagreed. But a closer look at the survey indicates that many Americans who can't afford fine dining still prefer large portions. Seventy percent of those earning at least $150,000 per year prefer smaller portions; but only 45 percent of those earning less than $25,000 want smaller.
It's not that working class Americans don't want to eat healthy. It's just that, after long hours at low-paying jobs, getting less on their plate hardly seems like a good deal. They live from paycheck to paycheck, happy to save a little money for next year's Christmas presents.
文章(15~19)
Parents in the United States tend to ask their children
A to save food.
B to wash the dishes.
C not to waste food.
D not to eat too much
"Clean your plate!" and "Be a member of the clean-plate club!" Just about every kid in the US has heard this from a parent or grandparent. Often, it's accompanied by an appeal: "Just think about those starving orphans in Africa!" Sure, we should be grateful for every bite of food. Unfortunately, many people in the US take too many bites. Instead of staying "clean the plate", perhaps we should save some food for tomorrow.
According to news reports, US restaurants are partly to blame for the growing bellies. A waiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government, according to a USA Today story. Americans traditionally associate quantity with value and most restaurants try to give them that. They prefer to have customers complain about too much food rather than too little.
Barbara Rolls, a nutrition professor at Pennsylvania State University, told USA Today that restaurant portion sizes began to grow in the 1970s, the same time that the American waistline began to expand.
Health experts have tried to get many restaurants to serve smaller portions. Now, apparently, some customers are calling for this too. The restaurant industry trade magazine QSR reported last month that 57 percent of more than 4,000 people surveyed believe restaurants serve portions that are too large; 23 percent had no opinion; 20 percent disagreed. But a closer look at the survey indicates that many Americans who can't afford fine dining still prefer large portions. Seventy percent of those earning at least $150,000 per year prefer smaller portions; but only 45 percent of those earning less than $25,000 want smaller.
It's not that working class Americans don't want to eat healthy. It's just that, after long hours at low-paying jobs, getting less on their plate hardly seems like a good deal. They live from paycheck to paycheck, happy to save a little money for next year's Christmas presents.
文章(15~19)
Parents in the United States tend to ask their children
A to save food.
B to wash the dishes.
C not to waste food.
D not to eat too much
共用题干
Musical Training Can Improve Communication Skills
American scientists say musical training seems to improve communication skills and language retardation （延迟）.They found that developing musical skill involves the______(51)process in the brain as learning how to speak.The scientists believe that could______(52)children with learning disabilities.
Nina Krauss is a neurobiologist at Northwestern University in Illinois.She says musical training______(53)putting together different kinds of information,such as hearing music,looking at musical notes,touching an instrument and watching other musicians.This______(54)is not much different from learning how to speak.Both involve different senses.
She further explains musical training and learning to______(55)each make us think about what we are doing.She says speech and music______(56)through a structure of the nervous system called the brain stem.The brain stem______(57)our ability to hear.Until recently,experts have thought the brain stem could not be developed or changed.______(58)Professor Krauss and her team found that musical training can improve a person's brain stem activity.
The study involved individuals with different levels of musical______(59).They were asked to wear an electrical device that measures______(60)activity.The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument-the cello（大提琴）.Professor Krauss says cellos have sound qualities similar______(61)some of the sounds that are impor-tant with speech.The study found that the more years of training people had,the more______(62)they were to the sound and rhythm of the music.Those who were involved in musical activities were the same people in whom the______(63)of sensory events was the strongest.It shows the importance of musical training to children with learning______（64).She says using music to improve listening skills could mean they______(65)sentences and understand facial expressions better.
_________58
A:So
B:Moreover
C:As
D:But
Musical Training Can Improve Communication Skills
American scientists say musical training seems to improve communication skills and language retardation （延迟）.They found that developing musical skill involves the______(51)process in the brain as learning how to speak.The scientists believe that could______(52)children with learning disabilities.
Nina Krauss is a neurobiologist at Northwestern University in Illinois.She says musical training______(53)putting together different kinds of information,such as hearing music,looking at musical notes,touching an instrument and watching other musicians.This______(54)is not much different from learning how to speak.Both involve different senses.
She further explains musical training and learning to______(55)each make us think about what we are doing.She says speech and music______(56)through a structure of the nervous system called the brain stem.The brain stem______(57)our ability to hear.Until recently,experts have thought the brain stem could not be developed or changed.______(58)Professor Krauss and her team found that musical training can improve a person's brain stem activity.
The study involved individuals with different levels of musical______(59).They were asked to wear an electrical device that measures______(60)activity.The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument-the cello（大提琴）.Professor Krauss says cellos have sound qualities similar______(61)some of the sounds that are impor-tant with speech.The study found that the more years of training people had,the more______(62)they were to the sound and rhythm of the music.Those who were involved in musical activities were the same people in whom the______(63)of sensory events was the strongest.It shows the importance of musical training to children with learning______（64).She says using music to improve listening skills could mean they______(65)sentences and understand facial expressions better.
_________58
A:So
B:Moreover
C:As
D:But
共用题干
Robots may Allow Surgery in Space
Small robots designed by University of Nebraska researchers may______(51)doctors on Earth to help perform surgery on patients in space.
The______(52),wheeled robots,which are about 3 inches tall and as wide as lipstick case, can be slipped into small incisions and computer-controlled by surgeons in different______(53). Some robots are equipped with______(54)and lights and can send images back to surgeons and others have surgical tools attached that can be controlled______(55).
"We think this is going to replace open surgery," Dr. Dmitry Oleynikov said at a news ______(56).Oleynikov is a specialist in computer-assisted surgery at the University of Nebraska Medical Center in Omaha.
Officials hope that NASA will teach______(57)to use the robots soon enough so that surgeries could one day be performed in space.
On earth,the surgeons could control the robots themselves from other locations.For example, the robots could enable surgeons in other places to work on injured______(58)on the front line. Researchers plan to seek federal regulatory approval early next year. Tests on______(59)have been successful,and tests on humans in England will begin very soon.
The camera-carrying robots can provide views of______(60)areas and the ones with surgical tools will be able to maneuver inside the body in______(61)surgeons' hands can't. The views from
the camera-carrying robots are better than the naked eye,because they send back color images that are______(62).Because several robots can be inserted through one incision,they could reduce the amount and______(63)of cuts needed for surgery,which would decrease______(64)time. This is particularly helpful to those patients who have been debilitated by long illness.
______(65),Oleynikov said,the tiny robots may enable surgeons to work without even placing their hands in patients' bodies."That's the goal,"Oleynikov said."It's getting easier and easier. We can do even more with these devices.
_________(54)
A:recorders
B:antennas
C:cameras
D:sensors
Robots may Allow Surgery in Space
Small robots designed by University of Nebraska researchers may______(51)doctors on Earth to help perform surgery on patients in space.
The______(52),wheeled robots,which are about 3 inches tall and as wide as lipstick case, can be slipped into small incisions and computer-controlled by surgeons in different______(53). Some robots are equipped with______(54)and lights and can send images back to surgeons and others have surgical tools attached that can be controlled______(55).
"We think this is going to replace open surgery," Dr. Dmitry Oleynikov said at a news ______(56).Oleynikov is a specialist in computer-assisted surgery at the University of Nebraska Medical Center in Omaha.
Officials hope that NASA will teach______(57)to use the robots soon enough so that surgeries could one day be performed in space.
On earth,the surgeons could control the robots themselves from other locations.For example, the robots could enable surgeons in other places to work on injured______(58)on the front line. Researchers plan to seek federal regulatory approval early next year. Tests on______(59)have been successful,and tests on humans in England will begin very soon.
The camera-carrying robots can provide views of______(60)areas and the ones with surgical tools will be able to maneuver inside the body in______(61)surgeons' hands can't. The views from
the camera-carrying robots are better than the naked eye,because they send back color images that are______(62).Because several robots can be inserted through one incision,they could reduce the amount and______(63)of cuts needed for surgery,which would decrease______(64)time. This is particularly helpful to those patients who have been debilitated by long illness.
______(65),Oleynikov said,the tiny robots may enable surgeons to work without even placing their hands in patients' bodies."That's the goal,"Oleynikov said."It's getting easier and easier. We can do even more with these devices.
_________(54)
A:recorders
B:antennas
C:cameras
D:sensors
Their parents once lived under very severe conditions.
A:sound
B:hard
C:strict
D:tight
A:sound
B:hard
C:strict
D:tight
She will be pleased to meet you.
A:angry
B:happy
C:sad
D:unwilling
A:angry
B:happy
C:sad
D:unwilling
共用题干
Global Warming
Few people now question the reality of global warming and its effects on the world's climate. Many scientists1the blame for recent natural disasters on the increase2the world's temperatures and are convinced that,more than3before,the Earth is at4from the forces of the wind,rain and sun.5to them,global warming is making extreme weather events,6as hurricanes and droughts,even more7and causing sea levels all around the world to8.
Environmental groups are putting9on governments to take action to reduce the 10 of carbon dioxide which is given 11 by factories and power plants,thus attacking the problem at its source. They are in12of more money being spent on research into so-lar,wind and wave energy devices,which could then replace existing power13.
Some scientists,14believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow,we would have to wait15hundred years to notice the results. Global warming,it seems,is here to stay.
14._________
A: but
B: although
C: despite
D: however
Global Warming
Few people now question the reality of global warming and its effects on the world's climate. Many scientists1the blame for recent natural disasters on the increase2the world's temperatures and are convinced that,more than3before,the Earth is at4from the forces of the wind,rain and sun.5to them,global warming is making extreme weather events,6as hurricanes and droughts,even more7and causing sea levels all around the world to8.
Environmental groups are putting9on governments to take action to reduce the 10 of carbon dioxide which is given 11 by factories and power plants,thus attacking the problem at its source. They are in12of more money being spent on research into so-lar,wind and wave energy devices,which could then replace existing power13.
Some scientists,14believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow,we would have to wait15hundred years to notice the results. Global warming,it seems,is here to stay.
14._________
A: but
B: although
C: despite
D: however
共用题干
New Research Lights the Way to Super-fast Computers
1. New research published today in the journal Nature Coniniunications,has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could significantly increase computer processing speeds and power in the future.
2. The research by the University of Surrey,in collaboration with the University of Cambridge and the University of Southampton,has found it is possible to change the electronic properties of amorphous chalcogenides,a glass material integral to data technologies such as CDs and DVDs. By using a technique called ion doping,the team of researchers have discovered a material that could use light to bring together different computing functions into one component,leading to all-optical systems.
3. Computers currently use electrons to transfer information and process applications.On the other hand,data sources such as the Internet rely on optical systems:the transfer of information using light. Optical fibres are used to send information around the world at the speed of light,but these signals then have to be converted to electrical signal once they reach a computer,causing a significant slowdown in processing.
4 .“The challenge is to find a single material that can effectively use and control light to carry information around a computer. Much like how the web uses light to deliver information,we want to use light to both deliver and process computer data,”said project leader,Dr. Richard Curry of the University of Surrey.
5 .“This has eluded researchers for decades,but now we have shown how a widely used glass Call be manipulated to conduct negative electrons,as well as positive charges,creating what are known as‘pn-junction'devices. This should enable the material to act as a light source,a light guide and a light detecto—something that can carry and interpret optical information.In doing so,this could transform the computers of tomorrow,allowing them to effectively process infonna- tion at much faster speeds.”
6. The researchers expect that the results of this research will be integrated into computers within ten years .In the short term,the glass is already being developed and used in next-generation computer memory technology known as CRAM,which may ultimately be integrated with the advances reported.
The new glass material makes it possible to fulfill different computing function_________.
A: optical information
B: processing speeds
C: electrons
D:positive charges
E: data technologies
F: all-optical systems
New Research Lights the Way to Super-fast Computers
1. New research published today in the journal Nature Coniniunications,has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could significantly increase computer processing speeds and power in the future.
2. The research by the University of Surrey,in collaboration with the University of Cambridge and the University of Southampton,has found it is possible to change the electronic properties of amorphous chalcogenides,a glass material integral to data technologies such as CDs and DVDs. By using a technique called ion doping,the team of researchers have discovered a material that could use light to bring together different computing functions into one component,leading to all-optical systems.
3. Computers currently use electrons to transfer information and process applications.On the other hand,data sources such as the Internet rely on optical systems:the transfer of information using light. Optical fibres are used to send information around the world at the speed of light,but these signals then have to be converted to electrical signal once they reach a computer,causing a significant slowdown in processing.
4 .“The challenge is to find a single material that can effectively use and control light to carry information around a computer. Much like how the web uses light to deliver information,we want to use light to both deliver and process computer data,”said project leader,Dr. Richard Curry of the University of Surrey.
5 .“This has eluded researchers for decades,but now we have shown how a widely used glass Call be manipulated to conduct negative electrons,as well as positive charges,creating what are known as‘pn-junction'devices. This should enable the material to act as a light source,a light guide and a light detecto—something that can carry and interpret optical information.In doing so,this could transform the computers of tomorrow,allowing them to effectively process infonna- tion at much faster speeds.”
6. The researchers expect that the results of this research will be integrated into computers within ten years .In the short term,the glass is already being developed and used in next-generation computer memory technology known as CRAM,which may ultimately be integrated with the advances reported.
The new glass material makes it possible to fulfill different computing function_________.
A: optical information
B: processing speeds
C: electrons
D:positive charges
E: data technologies
F: all-optical systems