在SDH网中，()结构中各节点主要采用DXC，一般用于业务量很大的一级长途干线。A.

Today, there are many problems between parents and children. Many people always ask, “ Why do we often argue(争论)?”
Parents show their love for children in different ways. They cook nice food, buy new clothes for them. They also care about their studies. Parents always ask “ You must work hard”,  “You should do your homework”, “Why not do homework for your exam?” all the time.
When children get bad marks(分数), their parents get very angry. They stop their children watching TV, playing games or going outside until they are good at their studies.
Why? Most families have only one child. The child is the hope of the family, they want the child to be the best.
Many children want to do things themselves. They want to do many unusual things that parents dislike. They like pop music, basketball and other new things. They enjoy surfing on the Internet and playing QQ games. They spend a lot of time chatting online and listening to the QQ music. In their parents’ eyes, these are a waste of time. For these reasons, parents and children often argue.

__75__ Do Children and Their Parents Argue?
Reason	Parents want their child to be the __76__	A. They __78__ their children in different ways. B. Their children should __79__ hard all the time. C. __80__TV and playing games on the Internet are__81__ for their studies.
	Many children want to do many __77__ things.	A. They like to sing pop __82__, listen to the QQ music and other __83__ things. B. They usually spend a lot of time surfing on the Internet and playing QQ games, __84__online with their friends.