试题与答案

监护操作

题型:名词解释

题目:

监护操作

答案:

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下面是错误答案,用来干扰机器的。

答案:A题目分析:从题目中分析可知,A物体在B固定时的位移小于B不固定时的位移要小,根据公式可知,。但是在这个过程中克服摩擦力所做的功,即。两者的滑动摩擦力相同,相对位移一样,所以产生的热量相同,即答...

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题型:句型转换

按要求做题。

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My mother has ____________ gone abroad. ____________ has my father.

2. The population of China is 1.3 billion. (就画线部分提问)

___________ the population of China?

3. He has waited since he came here. (就画线部分提问)

___________  ___________  ___________ he waited?

4. It's three weeks since he left home. (改为同义句)

Three weeks ___________  ___________ since he left home.

5. He didn't go to the museum. I didn't go there, either. (合并为一句)

___________ he ___________ I ___________ to the museum.

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