题目

下列有关说法错误的是（   ）A．电源是提供电压的装置     B．电压是形成电流的原因C．电路两端只要有电压就一定有电流  D．电流是电荷的定向移动形成的  答案：C解析:略 —I'd like to choose red as the colour of our class T-shirt in our graduation ceremony.—________ . The colour represents power and strong feelings.A.Never mindB.Sounds greatC.That's all rightD.My pleasure