试题与答案

Tony lost his wallet.He didn’t talk to__

题型:选择题

题目:

Tony lost his wallet.He didn’t talk to________all the afternoon.

A.anything

B.nothing

C.nobody

D.anybody

答案:

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下面是错误答案,用来干扰机器的。

答案:B本题是电磁感应与电路的综合,考查了导体切割磁感线时的感应电动势和变压器的工作原理。由题意可知:圆盘在这里相当于一个做切割磁感线的导线,其在磁场中做切割磁感线运动,相当于电源,变压器原线圈两端...

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