邮政编码的前()位代表县市局。
A、2
B、3
C、4
参考答案:A
-What kind of persons do you prefer to make friends with?
-I choose my friends on their characters and how we ______.
A.get in
B.get up
C.get on
D.get off
停电更换熔断器后,()时,应戴手套和护目眼镜。
A、恢复操作
B、拆卸熔丝
C、清理现场