客户在申请验表期间，其电费可暂不按期交纳，验表结果确认后，再行退还电费。
参考答案：错
_____ is mentioned above, the number of the students in senior schools is increasing in this district. [ ]
A. Which
B. As
C. That
D. It
保护线上（）设置开关电器，但允许设置供测试用的只有用工具才能断开的接点。
A、不应
B、严禁
C、可以
D、不宜
