问题 名词解释

冷却剂的冷却效应

答案

参考答案:

是指为加热1kg冷却剂到一定的熔池温度所消耗的物理热和冷却剂发生化学反应应消耗的化学热之和。

阅读理解

My mother was telling me about how she and her family got their first television when she was a teenager. Of course it was black and white. She said she only watch it at night. She doesn’t remember over watching it in the morning or afternoon. When I was young we had only about 3 or 4 different channels(频道). My bothers, my sisters and I would sometimes fight(打架) about which channel to watch. But we usually enjoyed the same shows. Now we can get hundreds of channels on TV. I can’t believe it! There are channels with old films, cooking, fishing and so on. It’s surprising! There is a channel for everything. I wonder how much my bothers, my sisters and I would fight if we had hundreds of channels when I was a child. Of course we had only one television set. These days I find families with 2 or 3 or more television sets in their homes. I guess it stops people from arguing(吵架) about which channel to choose from .

小题1:In those days, how many television sets did people have?

A.more than one

B.one

C.3 or 4

D.more than 4小题2:What kind of TV channels do we have now?

A.Channels with cooking

B.Channels with old films

C.Channels with fish

D.A, B&C小题3:Now how many channels can we get on TV?

A.3 or 4 different channels.

B.Only one channel.

C.Hundreds of channels.

D.Less than 10 channels.小题4:When my mum was a teenager, her brothers, sisters and she usually enjoyed______.

A.different channels

B.the same shows

C.different shows

D.all the shows小题5:Which of the following in NOT true?  

A.My mum’s brothers and sisters would fight about which channel to watch when she was a child.

B.These days, there is only one channel with old movies, cooking and fishing.

C.People have many channels to choose from now.

D.Family members will not fight for the television set.

单项选择题