单选题在电路中，电压和电流方向关系中说法错误的是（）。A在电源以外电路中，电流的方向就是电压降的方向B在电路元件中，电压和电流的参考方向常取一致的关联正方向C电压和电流的方向总是一致D在电源内部，电流的方向是电位升的方向
单选题
在电路中，电压和电流方向关系中说法错误的是（）。
A
在电源以外电路中，电流的方向就是电压降的方向
B
在电路元件中，电压和电流的参考方向常取一致的关联正方向
C
电压和电流的方向总是一致
D
在电源内部，电流的方向是电位升的方向
参考解析
解析：
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