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【简答题】
现将电池组、滑动变阻器、带铁芯的线圈 A. 线圈 B. 电流计及开关按如图1所示连接。下列说法正确的是( ) 图1 A.开关闭合后,线圈A插入或拔出引起电流计指针偏转 B.线圈A插入线圈B中后,开关闭合和断开的瞬间电流计指针均不会偏转 C. 开关闭合后,滑动变阻器的滑片P匀速滑动,会使电流计指针静止在中央零刻度 D. 开关闭合后,只有滑动变阻器的滑片P加速滑动,电流计指针才会偏转
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【单选题】Where there are multiple accident victims, which injuries should be the FIRST to receive emergency treatment?
A.
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B.
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D.
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C.
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D.
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