问题 单项选择题

空气循环制冷系统中,水分离器温度控制活门的控制信号来源为:()

A、水分离器进出口压力差。

B、水分离器出口的空气温度。

C、水分离器进出口压力差或水分离器出口处的空气温度。

D、座舱实际温度。

答案

参考答案:C

阅读理解

At 18, many American young people go off on their own. They go away to college or find full-time jobs, and they often rent their own apartments. Some get married and start families. This independence(独立性)is learned from childhood. From an early age, American children learn responsibility. Children as young as 2 begin to put away their toys and dress themselves. At 3, many children do simple chores like setting the table.

Using money wisely is also taught early. As soon as a child understands the value of money, he or she receives a weekly allowance. This is used for things the child wants, like toys or treats. The child can spend of save it, usually with little guidance(指导) from parents. If the child wants money besides his or her allowance, it must be made by doing extra chores.

Children are taught early in life to think for themselves. They are allowed to make some decisions-and make mistakes. Failure(失败) often teaches more than success.

小题1: Many American young people begin to live on themselves _____ .

A.at eighteen years old

B.from childhood

C.after they get married

D.from an early age小题2: An American child learn to _____ at the age of 2 .

A.find a full-time job

B.from childhood

C.put away his or her own clothes

D.do lots of chores小题3:The word “allowance” (in paragraph 3 ) means ______ in Chinese.

A.奖品

B.零花钱

C.财产

D.礼物小题4: A child can get some more money by ______.

A.understanding the value of money

B.helping the rich

C.reading many books

D.doing extra chores小题5:The passage is mainly about ______ .

A.the independence of American children

B.the value of money

C.the guidance from parents

D.failure and success of American children

问答题 简答题