题目内容
In practice, what often happens is that a new theory is devised that is really an extension of the previous theory. For example, very accurate observations of the planet Mercury revealed a small difference between its motion and the predictions of Newton's theory of gravity. Einstein's general theory of relativity predicted a slightly different motion from Newton's theory. The fact that Einstein's predictions matched what was seen, while Newton's did not, was one of the crucial confirmations of the new theory. However, we still use Newton's theory for all practical purposes because the difference between its predictions and those of general relativity is very small in the situations that we normally deal with. (Newton's theory also has the great advantage that it is much simpler to work with than Einstein's!)
A good title for this passage is______.
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第二节
听下面5段对话或独白。每段对话或独白后有几道小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有5秒钟的时间阅读各个小题；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
听力原文：W: Good morning, officer.
M: Good morning; madam. Can I help you？
W: Yes, please. Where's the nearest pest office？
M: Er, look at this map. There's a north street. And there's a post office on the west street, and one in the market street.
W: Where's the nearest one？
M: Oh, yes, the nearest post office is near the market street.
How many post offices does the man talk about？
文中画线词语可以替换为()。
某工程网络图如下，要求工期为6天，进行工期优化正确的是()。
某分部工程，流水节拍如下表：
下列说法正确的有()。
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