单模光纤的平均接头损耗应不大于0.1dB/个；障碍处理后光缆的弯曲_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

单模光纤的平均接头损耗应不大于0.1dB/个；障碍处理后光缆的弯曲半径应不小于（）缆径。

A．5倍

B．10倍

C．15倍

D．20倍

答案

参考答案：C

补全对话，情景问答

给问句找出对应的答语。

( ) 1. What time is it now?
( ) 2. Are you ready?
( ) 3. What's the weather forecast?
( ) 4. How many shirts do you have?
( ) 5. What are you doing?

A. Sunny, but cool.
B. I'm packing my suitcase.
C. It's 11: 00.
D. No.
E. Two.

选择题

Had I been a little more careful, I________such a foolish mistake. [ ]

A. won't make

B. hadn't made

C. didn't make

D. wouldn't have made