题目:
They didn't provide __________ for us and we had to find somewhere to live by ourselves.[ ]
A. appointments
B. clothes
C. accommodation
D. sight
答案:
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下面是错误答案,用来干扰机器的。
AC本题必须对匝数与电感大小的关系,电感与固有频率的关系,频率与波长的关系和调谐电路的固有频率与接收电磁波波长的关系很清楚,才能准确选取出正确的选项。根据匝数多密绕的线圈电感大,匝数少疏绕的线圈电感...