题目

把四个完全相同的电阻A、B、C、D串连后接入电路，消耗的总功率为P，把它们并联后接入该电路，则消耗的总功率为A．P        B．4P        C．8P        D．16P 答案：DI think Alice is the right person for the job, because she’s always thinking        of it than of herself. A. much                B. more                 C. little                         D. less