共用题干
Seeing Red Means Danger Ahead
The color red often means danger一and by paying attention,accidents can be prevented.In the future,
the color red also may help_________（51)danger at construction sites.Thanks to new work by engineers,
bridge supports一or________(52)kinds of materials一could one day contain a color-changing material.It
will turn red_________(53)a structure collapses or falls apart.
The secret__________(54)the color-switching material is。particular typo of molecule（分子）.A mole-
cule is a group of atoms（原子）held together by chemical bonds. Molecules come_________(55)all shapes
and sizes,and make up __________ (56)you can see,touch or feel.How a molecule behaves depends on
_________(57) kinds of atoms it contains,and how they're held together.
When a polymer(聚合物）containing a color-changing molecule called a mechanophore (机械响应性聚
合物）which is about to break,it produces a_________(58).When a polymer with mechanophore molecules
becomes" injured" or__________(59),one of the mechanophore bonds________（60）and the material turns
red."It'S a really simple detection method,"says Nancy Sottos,one of the scientists who worked on the pro-
ject.Sottos and her team tested the color-changing polymers in their lab.The test_________(61)proved
encouraging,
There is a way to get rid of the red color:light. When a bright light is shone on the mechanophore,the
broken bond is fixed,and the red color________(62).This"self-healing"may be a problem for mngi-
neers.They need to use the color-changer in big construction projects that will be_________(63)in sun-
light. And sunlight will make the rnechanophore'S warning system______(64).
Sottos and her fellow scientists still have _________(65)work to do before the color-changing mole-
cules can be used outside the lab.
_________(58)
A: color
B:trouble
C:sound
D:time
Seeing Red Means Danger Ahead
The color red often means danger一and by paying attention,accidents can be prevented.In the future,
the color red also may help_________（51)danger at construction sites.Thanks to new work by engineers,
bridge supports一or________(52)kinds of materials一could one day contain a color-changing material.It
will turn red_________(53)a structure collapses or falls apart.
The secret__________(54)the color-switching material is。particular typo of molecule（分子）.A mole-
cule is a group of atoms（原子）held together by chemical bonds. Molecules come_________(55)all shapes
and sizes,and make up __________ (56)you can see,touch or feel.How a molecule behaves depends on
_________(57) kinds of atoms it contains,and how they're held together.
When a polymer(聚合物）containing a color-changing molecule called a mechanophore (机械响应性聚
合物）which is about to break,it produces a_________(58).When a polymer with mechanophore molecules
becomes" injured" or__________(59),one of the mechanophore bonds________（60）and the material turns
red."It'S a really simple detection method,"says Nancy Sottos,one of the scientists who worked on the pro-
ject.Sottos and her team tested the color-changing polymers in their lab.The test_________(61)proved
encouraging,
There is a way to get rid of the red color:light. When a bright light is shone on the mechanophore,the
broken bond is fixed,and the red color________(62).This"self-healing"may be a problem for mngi-
neers.They need to use the color-changer in big construction projects that will be_________(63)in sun-
light. And sunlight will make the rnechanophore'S warning system______(64).
Sottos and her fellow scientists still have _________(65)work to do before the color-changing mole-
cules can be used outside the lab.
_________(58)
A: color
B:trouble
C:sound
D:time
A young man is being hailed a hero tonight after rescuing two children.
A:reported
B:praised
C:proved
D:caught
A:reported
B:praised
C:proved
D:caught
共用题干
第一篇
Approaches to Understanding Intelligences
It pays to be smart,but we are not all smart in the same way.You may be a talented musician,but you might not be a good reader.Each of us is different.
Psychologists disagree about what is intelligence and what are talents or personal abilities.Psychologists have two different views on intelligence.Some believe there is one general intelligence.Others believe there are many different intelligences.
Some psychologists say there is one type of intelligence that can be measured with IQ tests.These psychologists support their view with research that concludes that people who do well on one kind of test for mental ability do well on other tests.They do well on tests using words,numbers,or pictures.They do well on individual or group tests,and written or oral tests.Those who do poorly on one test,do the same on all tests.
Studies of the brain show that there is a biological basis for general intelligence.The brains of intelligent people use less energy during problem solving.The brain waves of people with higher intelligence show a quicker reaction.Some researchers conclude that differences in intelligence result from differences in the speed and effectiveness of information processing by the brain.
Howard Gardner,a psychologist at the Harvard School of Education,has four children.He believes thai all children are different and shouldn't be tested by one intelligence test.Although Gardner believes general intelligence exists,he doesn't think it tells much about the talents of a person outside of formal schooling.He thinks that the human mind has different intelligences.These intelligences allow us to solve the kinds of problems we are presented with in life.Each of us has different abilities within these intelligences.Gardner believes that the purpose of school should be to encourage development of all of our intelligences.
Gardner says that his theory is based on biology.For example,when one part of the brain is injured,other parts of the brain still work.People who cannot talk because of brain damage can still sing.So,there is not just one intelligence to lose.Gardner has identified 8 different kinds of intelligence:linguistic,mathematical,spatial,
musical, interpersonal, intrapersonal, body-kinesthetic（身体动觉的）,and naturalistic.
Gardner believes that______.
A:all children are alike
B:children should take one intelligence test
C:there is no general intelligence
D:children have different intelligences
第一篇
Approaches to Understanding Intelligences
It pays to be smart,but we are not all smart in the same way.You may be a talented musician,but you might not be a good reader.Each of us is different.
Psychologists disagree about what is intelligence and what are talents or personal abilities.Psychologists have two different views on intelligence.Some believe there is one general intelligence.Others believe there are many different intelligences.
Some psychologists say there is one type of intelligence that can be measured with IQ tests.These psychologists support their view with research that concludes that people who do well on one kind of test for mental ability do well on other tests.They do well on tests using words,numbers,or pictures.They do well on individual or group tests,and written or oral tests.Those who do poorly on one test,do the same on all tests.
Studies of the brain show that there is a biological basis for general intelligence.The brains of intelligent people use less energy during problem solving.The brain waves of people with higher intelligence show a quicker reaction.Some researchers conclude that differences in intelligence result from differences in the speed and effectiveness of information processing by the brain.
Howard Gardner,a psychologist at the Harvard School of Education,has four children.He believes thai all children are different and shouldn't be tested by one intelligence test.Although Gardner believes general intelligence exists,he doesn't think it tells much about the talents of a person outside of formal schooling.He thinks that the human mind has different intelligences.These intelligences allow us to solve the kinds of problems we are presented with in life.Each of us has different abilities within these intelligences.Gardner believes that the purpose of school should be to encourage development of all of our intelligences.
Gardner says that his theory is based on biology.For example,when one part of the brain is injured,other parts of the brain still work.People who cannot talk because of brain damage can still sing.So,there is not just one intelligence to lose.Gardner has identified 8 different kinds of intelligence:linguistic,mathematical,spatial,
musical, interpersonal, intrapersonal, body-kinesthetic（身体动觉的）,and naturalistic.
Gardner believes that______.
A:all children are alike
B:children should take one intelligence test
C:there is no general intelligence
D:children have different intelligences
共用题干
第三篇
Archive Gallery: The Best of Bionics（仿生学）
Humans might be the most highly-evolved species on the planet,but most animals possess skills we can
only dream of having.Imagine how much electricity we could save if we could see in the dark the way cats
do. Imagine leaping from tree to tree like a monkey.Giraffes（长颈鹿）,which are otherwise calm and good-
natured,sleep only 4.6 hours a day.
We realized a long,long time ago that nature provides the best blueprint（蓝图）for invention.We've
borrowed canals from beavers（河狸）and reflectors from cat's eyes.Although the words "bionics" became
popular only after the 1960s,history shows that nature has always provided ideas on solving everyday prob-
lems. Our archives（档案）don't go back to the time of Leonardo da Vinci and his bird-like flying machines,
but we can take you to the late 19th century,where we applied those same principles for building our first
practical airplanes.
To prepare for their flight at Kitty Hawk,the Wright brothers studied the movements of pigeons to figure
out how they stayed high up when they were heavier than air. Their success inspired scores of successors to
improve on the airplane by studying various aspects of nature,One of Orville Wright’、pupils caught and
stuffed seagulls to examine their wingspan.Meanwhile,two French inventors examined spinning sycamore（美
国梧桐）seeds in an effort to apply those same motions,reversed,to a helicopter.
Some examples are more obvious than others.The outside of the airplane designed by the Wright
brothers looks like a minimalistic（简单抽象艺术）structure. On the other hand , Barney Connett ' s fish
submarine（潜水艇）actually looks like a fish.
Some bio-inspired concepts have yet to be invented.In the 1960s，the US Army commissioned several
university professors to conduct research on the motor skills of animals in hope of applying those same abili-
ties to tanks. Tanks that run like horses or jump like grasshoppers（蚂昨）一sounds shocking,doesn't it?
But imagine how life would change if we could achieve that.
What happened after the Wright brothers' success?
A:People carried out a systematic study on pigeons.
B:People could fly their airplanes for fun.
C:People kept their airplanes at a French gallery.
D:People studied more animals and plants to develop the airplane.
第三篇
Archive Gallery: The Best of Bionics（仿生学）
Humans might be the most highly-evolved species on the planet,but most animals possess skills we can
only dream of having.Imagine how much electricity we could save if we could see in the dark the way cats
do. Imagine leaping from tree to tree like a monkey.Giraffes（长颈鹿）,which are otherwise calm and good-
natured,sleep only 4.6 hours a day.
We realized a long,long time ago that nature provides the best blueprint（蓝图）for invention.We've
borrowed canals from beavers（河狸）and reflectors from cat's eyes.Although the words "bionics" became
popular only after the 1960s,history shows that nature has always provided ideas on solving everyday prob-
lems. Our archives（档案）don't go back to the time of Leonardo da Vinci and his bird-like flying machines,
but we can take you to the late 19th century,where we applied those same principles for building our first
practical airplanes.
To prepare for their flight at Kitty Hawk,the Wright brothers studied the movements of pigeons to figure
out how they stayed high up when they were heavier than air. Their success inspired scores of successors to
improve on the airplane by studying various aspects of nature,One of Orville Wright’、pupils caught and
stuffed seagulls to examine their wingspan.Meanwhile,two French inventors examined spinning sycamore（美
国梧桐）seeds in an effort to apply those same motions,reversed,to a helicopter.
Some examples are more obvious than others.The outside of the airplane designed by the Wright
brothers looks like a minimalistic（简单抽象艺术）structure. On the other hand , Barney Connett ' s fish
submarine（潜水艇）actually looks like a fish.
Some bio-inspired concepts have yet to be invented.In the 1960s，the US Army commissioned several
university professors to conduct research on the motor skills of animals in hope of applying those same abili-
ties to tanks. Tanks that run like horses or jump like grasshoppers（蚂昨）一sounds shocking,doesn't it?
But imagine how life would change if we could achieve that.
What happened after the Wright brothers' success?
A:People carried out a systematic study on pigeons.
B:People could fly their airplanes for fun.
C:People kept their airplanes at a French gallery.
D:People studied more animals and plants to develop the airplane.
Every week the magazine presents the profile of a well-known sports personality.
A: success
B: description
C: evidence
D: plan
A: success
B: description
C: evidence
D: plan
共用题干
Going on a Diet
A typical person needs about 1,800 calories per day to stay alive. These calories keep your heart___ 1 ___and your lungs breathing. They keep your organs operating___ 2___ and,your brain running. They also keep your body warm. A person___ 3___weight because he or she consumes more calories per day than needed. The only way to lose fat is to ___4 ___the number of calories that you consume per day. This is the basic___5___behind going on a diet.
Unfortunately,diets don't___6___or most people. They do lose weight but then go ___7___the diet and put it back. Building a sensible diet and exercise plan is the key to___8___ consistent weight. You need to figure out how many calories you need in a day and how many you ___9___take in. The next step is to add exercise so that you can ___10___the number of cal-onies you can consume per day.
Exercise charts can show you how many calories different___11___of exercise can burn.
Burning 250 or 500 calories per day can___12___ a big difference. You can ride an exercise bike while you are watching TV or you can ___13___ the stairs instead of the elevator. Find an exer- cise___14___.Exercise can be a lot easier if there is someone to talk to. It's a good idea to wear firm-fitting clothes if you are on a diet.___15___clothing acts as a reminder of what you are trying to accomplish.
11._________
A: ways
B: factors
C: functions
D: forms
Going on a Diet
A typical person needs about 1,800 calories per day to stay alive. These calories keep your heart___ 1 ___and your lungs breathing. They keep your organs operating___ 2___ and,your brain running. They also keep your body warm. A person___ 3___weight because he or she consumes more calories per day than needed. The only way to lose fat is to ___4 ___the number of calories that you consume per day. This is the basic___5___behind going on a diet.
Unfortunately,diets don't___6___or most people. They do lose weight but then go ___7___the diet and put it back. Building a sensible diet and exercise plan is the key to___8___ consistent weight. You need to figure out how many calories you need in a day and how many you ___9___take in. The next step is to add exercise so that you can ___10___the number of cal-onies you can consume per day.
Exercise charts can show you how many calories different___11___of exercise can burn.
Burning 250 or 500 calories per day can___12___ a big difference. You can ride an exercise bike while you are watching TV or you can ___13___ the stairs instead of the elevator. Find an exer- cise___14___.Exercise can be a lot easier if there is someone to talk to. It's a good idea to wear firm-fitting clothes if you are on a diet.___15___clothing acts as a reminder of what you are trying to accomplish.
11._________
A: ways
B: factors
C: functions
D: forms
共用题干
The Impact of Antarctic Ozone Hole
The Antarctic ozone（臭氧）hole is changing weather patterns across the Southern Hemisphere （半球）,even affecting the tropics,scientists have concluded. The scientists______(51)the new study added the ozone hole into standard climate models to_______(52)how it might have affected winds and rains. They say rainfall has moved further south towards the pole and the effect has been_______(53)strong over Australia.
And of_______(54)interest was the southward of the Southern Hemisphere jet stream. These high一altitude winds are_______(55)to determining weather patterns,in both hemispheres. Much of the cold weather felt in the UK_______(56)the last couple of winters,for example,was caused by blocking of the Northern Hemisphere stream.
The team found that overall,the ozone hole has_______(57)in rainfall moving south along with the winds._______(58)there are regional differences,particularly concerning Australia. In terms of the average for that zone,the ozone hole_______(59)about a 10% change一but for Australia,it's about 35%.
Their modeling indicated that global warming_______(60)greenhouse gas emissions is also a factor in changing rainfall patterns.
Natural climate cycles are also thought to be important here,as different rainfall patterns were _______(61)in the era before ozone depletion（消耗）and late 20th Century warming.
Although the_______(62)international organization has significantly checked emissions of harmful substances,they_______(63)for decades in the atmosphere,and so their effects are still being felt.Earlier,and international organization forecast that even the Antarctic ozone hole一which is more severe than its_______(64)in the Northern Hemisphere一should be_______(65)by 2045—2060.
_________(58)
A:So
B:But
C:Since
D:And
The Impact of Antarctic Ozone Hole
The Antarctic ozone（臭氧）hole is changing weather patterns across the Southern Hemisphere （半球）,even affecting the tropics,scientists have concluded. The scientists______(51)the new study added the ozone hole into standard climate models to_______(52)how it might have affected winds and rains. They say rainfall has moved further south towards the pole and the effect has been_______(53)strong over Australia.
And of_______(54)interest was the southward of the Southern Hemisphere jet stream. These high一altitude winds are_______(55)to determining weather patterns,in both hemispheres. Much of the cold weather felt in the UK_______(56)the last couple of winters,for example,was caused by blocking of the Northern Hemisphere stream.
The team found that overall,the ozone hole has_______(57)in rainfall moving south along with the winds._______(58)there are regional differences,particularly concerning Australia. In terms of the average for that zone,the ozone hole_______(59)about a 10% change一but for Australia,it's about 35%.
Their modeling indicated that global warming_______(60)greenhouse gas emissions is also a factor in changing rainfall patterns.
Natural climate cycles are also thought to be important here,as different rainfall patterns were _______(61)in the era before ozone depletion（消耗）and late 20th Century warming.
Although the_______(62)international organization has significantly checked emissions of harmful substances,they_______(63)for decades in the atmosphere,and so their effects are still being felt.Earlier,and international organization forecast that even the Antarctic ozone hole一which is more severe than its_______(64)in the Northern Hemisphere一should be_______(65)by 2045—2060.
_________(58)
A:So
B:But
C:Since
D:And
The architecture is harmonious and no building is over six-storey high.
A:old-fashioned
B:traditional
C:conventional
D:balanced
A:old-fashioned
B:traditional
C:conventional
D:balanced
He was weary of the constant battle between them.
A:fond
B:proud
C:tired
D:afraid
A:fond
B:proud
C:tired
D:afraid
共用题干
Singing Alarms Could Save the Blind.
If you cannot see,you may not be able to find your way out of a burning building-and that could be fatal .A company in Leeds could change all that______(51)directional sound alarms capable of guiding you to the exit.
Sound Alert,a company______(52)the University of Leeds,is installing the alarms in a residential home for______(53)people in Sommerset and a resource centre for the blind in
Cumbria.______(54)produce a wide range of frequencies that enable the brain to determine where the______（55)is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be______（56)by humans."It is a burst of white noise ______(57)people say sounds like static on the radio,"she says."Its life-saving potential is great."
She conducted an experiment in which people were filmed by thermal-imaging cameras trying to find their way out of a large______(58)room. It______(59)them nearly four minutes to find the door______(60)a sound alarm,but only 15 seconds with one.
Withington studies how the brain______(61)sounds at the university. She says that the _______(62)of a wide band of frequencies can be pinpointed more easily than the source of a narrow band .Alarms______(63)the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to indicate whether people should go up______(64)down stairs.They were______（65)with the aid of a large grant from British Nuclear Fuels.
56._________
A: watched
B: produced
C: learnt
D: heard
Singing Alarms Could Save the Blind.
If you cannot see,you may not be able to find your way out of a burning building-and that could be fatal .A company in Leeds could change all that______(51)directional sound alarms capable of guiding you to the exit.
Sound Alert,a company______(52)the University of Leeds,is installing the alarms in a residential home for______(53)people in Sommerset and a resource centre for the blind in
Cumbria.______(54)produce a wide range of frequencies that enable the brain to determine where the______（55)is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be______（56)by humans."It is a burst of white noise ______(57)people say sounds like static on the radio,"she says."Its life-saving potential is great."
She conducted an experiment in which people were filmed by thermal-imaging cameras trying to find their way out of a large______(58)room. It______(59)them nearly four minutes to find the door______(60)a sound alarm,but only 15 seconds with one.
Withington studies how the brain______(61)sounds at the university. She says that the _______(62)of a wide band of frequencies can be pinpointed more easily than the source of a narrow band .Alarms______(63)the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to indicate whether people should go up______(64)down stairs.They were______（65)with the aid of a large grant from British Nuclear Fuels.
56._________
A: watched
B: produced
C: learnt
D: heard
We found shelter from the rain under the trees.
A: defense
B: standing
C: protection
D: room
A: defense
B: standing
C: protection
D: room
共用题干
Some doctors think that you should drink a glass of water each morning. You should drink water before doing anything else.The temperature of the water should be similar to body temperature:not hot,not cold.Why should you drink this water?______(46).It helps clean out your kidneys.It prepares your stomach for digestion.______(47).After drinking water,the intestines can more easily take out nutrients from our food. And water helps us go to the bathroom more easily.
Scientists suggest that people take in 1,600 milliliters of water each day.______(48).If you do,your kidneys will have to work much harder to eliminate it. It's better to drink some in morning and some in afternoon.______(49).And during meals,they think water dilutes the juices produced in our stomachs.This can interfere with normal digestion.
Are you drinking enough water every day?Check the color of your urine.______(50).if your urine is very dark yellow,your probably need to drink more water. A little water each day could make you much healthier.
_________（48）
A:If it is light yellow,you are probably drinking enough
B:Water can also help your intestines work better
C:Some people think it's better to drink between meals
D:Water helps your body in many ways
E:But don't drink all of that water in one sitting
F: Water is an essential element of life
Some doctors think that you should drink a glass of water each morning. You should drink water before doing anything else.The temperature of the water should be similar to body temperature:not hot,not cold.Why should you drink this water?______(46).It helps clean out your kidneys.It prepares your stomach for digestion.______(47).After drinking water,the intestines can more easily take out nutrients from our food. And water helps us go to the bathroom more easily.
Scientists suggest that people take in 1,600 milliliters of water each day.______(48).If you do,your kidneys will have to work much harder to eliminate it. It's better to drink some in morning and some in afternoon.______(49).And during meals,they think water dilutes the juices produced in our stomachs.This can interfere with normal digestion.
Are you drinking enough water every day?Check the color of your urine.______(50).if your urine is very dark yellow,your probably need to drink more water. A little water each day could make you much healthier.
_________（48）
A:If it is light yellow,you are probably drinking enough
B:Water can also help your intestines work better
C:Some people think it's better to drink between meals
D:Water helps your body in many ways
E:But don't drink all of that water in one sitting
F: Water is an essential element of life
共用题干
U. S. Scientists Confirm Water on Mars
NASA scientists said that Mars was covered once by vast lakes,flowing rivers and a Va-riety of other wet environments that had the potential to support life.
Laboratory tests aboard NASA's Phoenix Mars Lander have identified water in a soil sample;the lander's robotic arm delivered the sample Wednesday to an instrument that iden-tifies vapors produced by the heating of samples.
“We have water,”said William Boynton of the University of Arizona,lead scientist for ,the Thermal and Evolved-Gas Analyzer,or TEGA.“This is the first time Martian water has been touched and tasted.”
The robotic arm is a critical part of the Phoenix Mars mission. It is needed to trench into the icy layers of northern polar Mars and deliver samples to instruments that will analyze what Mars is made of,what its water is like,and whether it is or has ever been a possible habitat for life.
The soil sample came from a trench approximately 2 inches deep.When the robotic arm first reached that depth,it hit a hard layer of frozen soil.Two attempts to deliver samples of icy soil on days when fresh material was exposed were foiled when the samples became stuck inside the scoop.Most of the material in Wednesday's sample had been exposed to the air for two days,letting some of the water in the sample vaporize away and making the soil easier to handle.
“Mars is giving us some surprises,”said Phoenix principal investigator Peter Smith of the University of Arizona.“We're excited because surprises are where discoveries come from. One surprise is how the soil is behaving. The ice-rich layers stick to the scoop when poised in the sun above the deck,different from what we expected,from all the Mars simulation tes-ting we've done so far.”
Since landing on May 25,Phoenix has been studying soil with a chemistry lab,TEGA, a microscope,a conductivity probe and cameras.The science team is trying to determine whether the water ice ever thaws enough to be available for biology and if carbon-containing chemicals and other raw materials for life are present.
The mission is examining the sky as well as the ground. A Canadian instrument is using a laser beam to study dust and clouds overhead.
“It's a 30-watt light bulb giving us a laser show on Mars,”said Victoria Hipkin of the Canadian Space Agency.
A full-circle,color panorama of Phoenix's surroundings also has been completed by the spacecraft.
“The details and patterns we see in the ground show an ice-dominated terrain as far as the eye can see,”said Mark Lemmon of Texas A & M University,lead scientist for
Phoenix's Surface Stereo Imager camera.“They help us plan measurements we're making within reach of the robotic arm and interpret those measurements on a wider scale.”
Which of the following do you think is the best description of Phoenix's Surface Ster-eo Imager Camera,according to your understanding of the passage?
A:.It imitates human vision and is able to capture three-dimensional images.
B: It imitates human voice and is able to record slight sounds while taking photos.
C: It takes clear photos that show every detail of the object.
D: It is this particular type of camera that can take wide angle pictures.
U. S. Scientists Confirm Water on Mars
NASA scientists said that Mars was covered once by vast lakes,flowing rivers and a Va-riety of other wet environments that had the potential to support life.
Laboratory tests aboard NASA's Phoenix Mars Lander have identified water in a soil sample;the lander's robotic arm delivered the sample Wednesday to an instrument that iden-tifies vapors produced by the heating of samples.
“We have water,”said William Boynton of the University of Arizona,lead scientist for ,the Thermal and Evolved-Gas Analyzer,or TEGA.“This is the first time Martian water has been touched and tasted.”
The robotic arm is a critical part of the Phoenix Mars mission. It is needed to trench into the icy layers of northern polar Mars and deliver samples to instruments that will analyze what Mars is made of,what its water is like,and whether it is or has ever been a possible habitat for life.
The soil sample came from a trench approximately 2 inches deep.When the robotic arm first reached that depth,it hit a hard layer of frozen soil.Two attempts to deliver samples of icy soil on days when fresh material was exposed were foiled when the samples became stuck inside the scoop.Most of the material in Wednesday's sample had been exposed to the air for two days,letting some of the water in the sample vaporize away and making the soil easier to handle.
“Mars is giving us some surprises,”said Phoenix principal investigator Peter Smith of the University of Arizona.“We're excited because surprises are where discoveries come from. One surprise is how the soil is behaving. The ice-rich layers stick to the scoop when poised in the sun above the deck,different from what we expected,from all the Mars simulation tes-ting we've done so far.”
Since landing on May 25,Phoenix has been studying soil with a chemistry lab,TEGA, a microscope,a conductivity probe and cameras.The science team is trying to determine whether the water ice ever thaws enough to be available for biology and if carbon-containing chemicals and other raw materials for life are present.
The mission is examining the sky as well as the ground. A Canadian instrument is using a laser beam to study dust and clouds overhead.
“It's a 30-watt light bulb giving us a laser show on Mars,”said Victoria Hipkin of the Canadian Space Agency.
A full-circle,color panorama of Phoenix's surroundings also has been completed by the spacecraft.
“The details and patterns we see in the ground show an ice-dominated terrain as far as the eye can see,”said Mark Lemmon of Texas A & M University,lead scientist for
Phoenix's Surface Stereo Imager camera.“They help us plan measurements we're making within reach of the robotic arm and interpret those measurements on a wider scale.”
Which of the following do you think is the best description of Phoenix's Surface Ster-eo Imager Camera,according to your understanding of the passage?
A:.It imitates human vision and is able to capture three-dimensional images.
B: It imitates human voice and is able to record slight sounds while taking photos.
C: It takes clear photos that show every detail of the object.
D: It is this particular type of camera that can take wide angle pictures.
That guy is intelligent but a bit dull．
A:strange
B:special
C:quiet
D:boring
A:strange
B:special
C:quiet
D:boring
You have to be patient if you want to sustain your position.
A:maintain
B:establish
C:acquire
D:support
A:maintain
B:establish
C:acquire
D:support