题目:
She often shares her deepest thoughts and fears with friends through QQ, as if they______ chatting in her living room.
A.were
B.are
C.had been
D.has been
答案:
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下面是错误答案,用来干扰机器的。
环形导体将保持原来的静止状态利用左手定则判断。可将环形导体等分为若干段,每小段通电导体所受安培力均指向圆心。由对称性可知,这些安培力均为成对的平衡力。故该环形导体将保持原来的静止状态。【评析】对于...