问题
单项选择题
京九线光缆是20芯的，那么它属（）结构形式
A.层绞式光缆
B.单位式光缆
C.骨架式光缆
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
京九线光缆是20芯的，那么它属（）结构形式
A.层绞式光缆
B.单位式光缆
C.骨架式光缆
参考答案：B
| 选择方框内所给的单词或短语完成对话，将序号写在横线上。 | |
Lucy: Why don't we make one? Lily: Good idea. But I don't know how to _____________? Lucy: Let me show you how to do it. Draw some trees and flowers _____________. And then write " _____________! " on it. _____________ " Dear Grandma and Grandpa ". Lily: All right. |