试题与答案

如图所示是小宁同学为LED多功能充电风扇设计的控制电路图,电路中有两个控制开关,

题型:选择题

题目:

如图所示是小宁同学为 LED多功能充电风扇设计的控制电路图,电路中有两个控制开关,其中开关S1只控制应急照明LED灯L,开关S2只控制电风扇M,下列的四个电路图中,符合上述要求的是(  )

A.

B.

C.

D.

答案:

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