如图所示电路中,电表a、b接法正确的是()
A:a、b都是电流表
B:a、b都是电压表
C:a是电流表,b是电压表
D:a是电压表,b是电流表
Helen has picked up French and can speak fluently after a short stay with her aunt in Paris.
为了探究电流跟电压的关系,王亮同学设计了图甲所示的电路.