题目

 It’s possible for ordinary people __________ on the moon in the near future. A. walk        B. to walk        C. walking        D. will walk 答案：B18．接在电路中的甲、乙两电灯，通电时甲比乙亮，可知（　　）A．通过甲的电流一定大B．甲灯两端电压一定高C．甲灯消耗的电功率一定大D．甲灯消耗的电能一定多