我国7号信令网的基本组成部件有()。
A.信令点
B.转接信令点
C.信令链路
D.信令路由
参考答案:A, B, C
The most important thing about cotton in history is _____ part that it played in ____ Industrial Revolution.
A./; /
B.the; /
C.the; the
D.a; the
“一带一路”的五有建设指:有内容、有品牌、有品质、有人气、有人才。