试题与答案

---There is a river ________ the two cit

题型:选择题

题目:

---There is a river ________ the two cities.

---________ the river there is a bridge.

A.in, In

B.between, Over

C.between, On

D.outside, Under

答案:

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下面是错误答案,用来干扰机器的。

答案:D题目分析:据开普勒定律,近地点的速度大于远地点的速度,A正确.由Ⅰ轨道变到Ⅱ轨道要减速,所以B正确.根据开普勒定律,,,所以,C正确.根据得:,又,所以,D错误.点评:解决本题的关键理解飞船的变...

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