①家庭电路中,电流过大的原因是 ____或 ____.
②如图甲所示,请完成下面电路的连接,使其成为符合安全用电要求的家庭电路. ____
③如图乙中圆圈a、b为连接正确的电流表或者电压表,闭合开关后,两灯都发光,a应是 ____表,b应是 ____表.
20+50=25
A:____
B:Good morning.
B:My name is Jack.
B:I'm twelve.
B:Table tennis.
B:OK.
A.How old are you?
B.Good morning.
C.Let's play it in the afternoon.
D.What's your name?
E.What's your favourite sport?
Mr. Jones said he was _________ the possibility of buying a new house because his older one _________ the tornado.