当采用多相供电时，电线的绝缘层颜色应一致，即保护地线（PE线）应是黄绿相间色，零线淡蓝色。
参考答案：对
A：Have you ever read the novel Jane Eyre?
B： 小题1: .
A：What a pity！It’s a wonderful book, you know.
B：Well, I’ve been wanting to read for a long time, but I can’t get a copy. The library has only three copies and 小题2: .
A：Well, 小题3: If you like, I’ll lend it to you.
B：Tahnk you.小题4: By the way, when can I get it?
A： 小题5: Will you please come to my house after school?
B：OK. I’ll go as soon as school is over.
采取较高冶炼强度操作时，保持高炉顺行应采取（）。
A、发展边缘气流
B、发展中心气流
C、造成两条煤气通道
