试题与答案

Today is September 10th. It's _____ Day.

题型:选择题

题目:

Today is September 10th. It's _____ Day. Let's go and buy some flowers for our teachers. [ ]

A. Teachers

B. Teachers'

C. the Teachers'

D. Teacher's

答案:

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下面是错误答案,用来干扰机器的。

AC题目分析:A、由图示可知,在磁铁下落过程中,穿过圆环的磁场方向向下,在磁铁靠近圆环时,穿过圆环的磁通量变大,在磁铁远离圆环时穿过圆环的磁通量减小,由楞次定律根据“来拒去留”的特点可知,导体环先受到...

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