试题与答案

若平面A在平面B上的正投影为一条直线,则平面A与B垂直。

题型:判断题

题目:

若平面A在平面B上的正投影为一条直线,则平面A与B垂直。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:必需氨基酸的需要量模式答案为了满足蛋白质合成的要求,各种必需氨基酸之间应有一个适宜的比例。这种必需氨基酸之间相互搭配的比例关系称为必需氨基酸需要量模式或氨基酸计分模式(amino acid scoring pattern)。

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题型:完形填空

Now, most people have watches. As we know, Switzerland(瑞士) is famous for its watches. (1) , the watch was not ( 2) in this country. It was the British who did. Many years ago, an Englishman traveled to Italy and on his way he went (3) a small town in Switzerland. This Englishman traveled in a carriage(马车) inside which there was a carriage watch. This was the _(4) kind of watch. A blacksmith’s(铁匠) assistant hoped to see the watch. He (5) what it was. (6) he asked the Englishman about it. “ It is a carriage watch,” said the Englishman. “ This machine can tell the (7) but now it isn’t working.”
At once the blacksmith’s assistant(助理)decided to try to (8) it. So the traveler handed him the watch. He was very (9). So it was not surprising that he was (10) in showing it right. He even remembered how it was made. As soon as the traveler had gone, he made a watch of exactly(精确地) the same kind.
So the watch-making was started in Switzerland. Today Swiss watches are sold all over the world.
小题1:
A.SoB.AndC.HoweverD.For
小题2:
A.broughtB.inventedC.cameD.appeared
小题3:
A.onB.atC.inD.through
小题4:
A.earliestB.latestC.nicestD.cheapest
小题5:
A.knewB.wonderedC.thoughtD.wrote
小题6:
A.BecauseB.AfterC.SoD.Since
小题7:
A.timeB.priceC.addressD.number
小题8:
A.repairB.stealC.makeD.buy
小题9:
A.hardworkingB.strongC.forgetfulD.clever
小题10:
A.difficultB.hardC.gladD.successful
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