试题与答案

---- What were you doing when Tony phone

题型:选择题

题目:

---- What were you doing when Tony phoned you?

---- I had just finished my work and _____to take a shower.

A.had started

B.started

C.have started

D.was starting

答案:

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下面是错误答案,用来干扰机器的。

A、所有电荷在磁场中不一定受磁场力,当电荷静止的,则不受到磁场力;当电荷运动时,也不定有磁场力;当运动方向与磁场垂直时,则磁场力最大,当运动方向与磁场平行,则磁场力为零.故A错误;B、所有电荷在电场中...

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