管道光缆敷设完成后,在一人孔内发现光缆的曲率半径不符合要求,这可能影响东光缆的()指标。
A.对地绝缘
B.接头损耗
C.通道衰减
D.偏振色散
参考答案:C
选择正确的答语。
1. Fengfeng: Are you a student?
Lingling: ____________[ ]
A. Yes, I'm a student.
B. No, I'm Chinese.
2. Li Ming: What's this?
Fengfeng: ___________[ ]
A. Thank you.
B. It's a book.
3. Li Ming: How are you?
A. I'm hungry.
B. I'm a boy.
大气污染最容易引起的疾病是()。
A.南唐
B.南汉
C.三国
D.南宋