题目

在图15所示的电路中将电源、电流表和电压表三个元件符号正确填入电路的空缺处，要求：闭合电键S，滑动变阻器的滑片P向右移动时只有一个电表的示数变大。 答案：按题意填图正确得分__________ she couldn’t understand was_________more and more students showed little interest in their lessons.A．What; whyB．That; whatC．What; because D．Why; that