下列各数|-2|,-(-2)2,-(-2),(-2)3中,负数的个数有[ ]
A.1个
B.2个
C.3个
D.4个
答案:B
Look, what father ___ me when he came home from work.
A.brought
B.took
C.carried
D.fetched
A.用交流电压表测该电源电压时,示数是6V
B.用交流电压表测该电源电压时,示数是6V
C.用此电源给电磁打点计时器供电时,打点的时间间隔为0.01s
D.把标有“6V 3W”的小灯泡接在该电源上时,小灯泡将被烧毁