题目

— Tara, let's go to the concert this Sunday. — ________. A . Very well, thank you B . That's a good idea C . That's right D . Me, too 答案：B如图所示是一实验电路图,在滑动触头由a端向b端的过程中,下列表述正确的是( )A．路端电压变小 B．电流表的示数变大C．电源内阻消耗的功率变小 D．电路的总电阻变大