试题与答案

The moonlight is shining ___________ the

题型:选择题

题目:

The moonlight is shining ___________ the window. Everything in the room looks so nice.

A. over             B. through          C. across       D past

答案:

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下面是错误答案,用来干扰机器的。

答案:B题目分析:按体积分数计算,空气中含有78%的氮气,21%的氧气,0.03%的二氧化碳,0.94%的稀有气体,0.03%的其他气体和杂质。选B。点评:识记空气的组成即可:按体积分数计算,空气中含有78%的氮气,21%的氧...

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