已知一个等差数列的首项为1，公差为3，那么该数列的前5项和为（）
A.35
B.30
C.20
D.10
A.whole the
B.whole
C.the all
D.all the
A.most
B.more
C.much
D.many
Urban crowdedness would be greatly relieved if only the____ charged on public transport were more reasonable．
A.fees
B.fares
C.payments
D.costs
I have got a chair____ ．
A.to sit
B.for to sit on
C.to sit on
D.for sitting
_isknowntotheworld,MarkTwainwasagreatAmericanwriter.
- A.As
- B.Once
- C.That
- D.It
39
A.source
B.result
C.consequence
D.reason
根据以下内容回答题：
Every couDle who goes to the altar（圣坛）believes that they will make that trip onlyonce in their lives．They want the day to be perfect，and they are asking for much more than good weather．Thev want the most beautiful clothes，the freshest flowers．Moreover，her family who will foot the bill is not in any mood，to economize． A quick look at any bride magazine will reveal that plenty of attractive goods and services compete for a share of the wedding budget．Besides the obvious choices of rings，dresses，flowers，and photographs，there are the less apparent expenses：a lavish（奢侈的）cake，a rehearsal dinner，a reception，music fbr both the ceremony and the reception，tips，and even nadkins and matchbooks printed with the couple’s names and the wedding date． As the arrangements are generally complicated，there are plenty of services that can be hired to helD with the planning and execution of the every aspect of the wedding：planning the photographs，selecting the wedding rings，choosing the flowers，picking the honeymoon spot，and so on．One magazine lists over 350 such pamphlets published，of course，by businesses who have something to offer．Considering that weddings do more than l 2 billion dollars worth of business annually in the US alone，such activity isn’t surprising． What is surprising is that not one company dominates the industry．It seems that when people plan for a day as special to them as a weddin9，they resist standardization．They turn instead to the small local suppliers known to them or to their friends．Family members or friends often servee as Dhotographers，caterers and musicians．This．not only helps bring the wedding cost down，but makes it more personal． What about the couple that doesn’t want to take in this billion-dollar industry？They can go to eity hall and get married for less than the price of a hamburger．
What does the expression“this billion．dollar industry”refer to？
A.The budgets of weddings．
B.The business ofweddings．
C.The planning and execution of weddings
D.The high wedding expenses．
函数y=x4-2x2+5在区间[-2，2]上的（）
A.最大值为13，最小值为4
B.最大值为5，最小值为4
C.最大值为13，最小值为5
D.最大值是最小值的3倍
A.technology
B.machinery
C.technique
D.skill
食管下段括约肌的英文简写名称是（）
- A.ELS
- B.SLE
- C.LES
- D.SEL
读长江中下游图和美国五大湖地区图，分析比较回答．（10分）
(1)两地的气候类型分别是：长江中下游地区___\__区____\_商品性农业生产基地；五大湖周围属_____
(2)长江中下游地区是我国的_____农业带．
(3)两地工业发展的有利条件共同之处是（至少四点）：A___\_；B____\_;C____\_；D________．
(4)两地相同的工业部门有（至少两点）___\_、________．
图8—2为美国本土工业分布图，关于该图的正确叙述（）
A.图中A工业区中③和④均是新兴电子工业中心
B.图中B工业区铁矿丰富而缺少煤炭资源
C.图中①、②和⑥均为石油和农产品输出港
D.图中⑤是美国中部的交通与工业中心
过(1,-1)与直线3x+y-6=0平行的直线方程是()
A.3x-y+5=0
B.3x+y-2=0
C.x+3y+5=0
D.3x+y-1=0
下列各句中，没有语病的一句是()
A、对大家的开导，他不但一句都听不进去，反而像受了多大委屈,大家只好什么都不说了。
B、重新设定程序以后，打印速度不仅提高了将近一倍，而且清晰度也达到前所未有的水平。
C、大家终于认识到，如果把这次事故的影响不彻底肃清，那么今后就埋下了巨大的隐患。
D、要不要实行新奖励办法、大幅度提高奖励金额，一个月来广泛地在各部门展开了议论。