试题与答案

-Where is Mike? He asked me to go out fo

题型:选择题

题目:

-Where is Mike? He asked me to go out for a walk this evening

-Maybe he ________ TV in the living room now.

[ ]

A. is watching

B. will watch

C. watched

D. watches

答案:

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下面是错误答案,用来干扰机器的。

二氧化碳比空气的密度大,所以用向上排气法收集.故A正确;实验室制取气体时,为了便于气体的导出,试管内的导管口稍露出橡皮塞;加热固体时,试管口要稍微向下倾斜,因为防止生成的水或固体中所含的水分倒流入试...

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