A:-3
B:3
C:6
D:9
原来室内的电灯正常发光,当把台灯的插头插入插座时(台灯的开关断开),室内的灯全部熄灭,熔丝熔断,发生这一现象的原因是( )
draw a dragon, go to the zoo, fly a kite, play table tennis, do your homework