问题 问答题 简答题

新发动机或大修后的发动机,工作50h后应进行哪些检查保养工作?

答案

参考答案:

必须更换机油,同时进行以下检查保养工作:

1.更换机油滤筒。

2.检查缸盖上进排气管的紧固状态。

3.检查空气滤清器的橡胶管和卡箍是否连接紧密。

4.再次拧紧机油的放油螺栓和发动机支架固定螺栓。

阅读理解

“Teenager” means a person from 13 to 19 years old. Although they’re young, they have to make many important choices by themselves. Often teachers and parents cannot handle them because they don’t understand and know teenagers, especially their wishes, problems or different moods in a short time. They need to think about questions like these: Should we go to college? What kind of job do I want? However, other people also influence their choices. Who influences teenagers?

It depends on the kind of choice. When teenagers buy things, friends are the most important influence. This is especially true for clothes and music. TV shows, advertisements and parents also influence teenagers. In more serious things, parents are probably the most important influence. Some teenagers say it’s best to regard both parents and friends as influences. James, a seventeen-year-old boy says he’s “just a crazy man”. He also says, “Parents are really important because they can tell you what’s right and wrong.”

But teenagers also feel they need to make choices—to make their own mistakes. As one teenager girl said, “If our parents don’t let us make our own choices, maybe in the future we don’t know how to do it.” And they feel friends can often be a big help, especially because friends sometimes know more about their situation than their parents.

小题1: Why do teenagers sometimes have to make their own choices?

Because the teachers want them to do it.

Because their parents want them to do it.

Because teenagers like to make choices by themselves.

Because teachers and parents don’t understand them well.

小题2: Who influences most to the teenagers when they buy music?

A.Their teachers.

B.Theirs parents.

C.Their friends.

D.Movie stars.小题3: What does the passage mainly talk about?

Everybody needs to make choices.

Teenagers need to make choices by themselves.

Teenagers know more about TV shows and music.

Teachers and parents should help teenagers as much as possible.

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