试题与答案

— Would you like to give us a talk somet

题型:选择题

题目:

— Would you like to give us a talk sometime next week?

— Sure. But what subject should I _____? [ ]

A. talk  

B. talk about  

C. talk with   

D. talk to

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:根据质量守恒定律,结合具体反应分析。A、由于实验中过氧化氢分解生成了氧气,故气球会膨胀,在气球受到空气向上的浮力的作用下,反应后的锥形瓶对天平左盘的压力变小,故天平指针偏转,错误;B...

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