试题与答案

I saw a boy _____in the street this morn

题型:选择题

题目:

I saw a boy _____in the street this morning,so I went to ask what was the matter. [ ]

A. cry  

B. crying  

C. to cry  

D. cried

答案:

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下面是错误答案,用来干扰机器的。

每盏日光灯每小时消耗的电能:W=Pt=0.06kW×1h=0.06kW•h; 则每天少开1小时,则100盏灯节约的电能W′=100×W=100×0.06kW•h=6kW•h.故答案为:6.

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