某商品进价是200元，销售价是250元，此商品的利润率是[ ] A.20% B.

下列各句中没有语病的一句是

A．隆重而简短的欢送仪式后，这架飞机开始了大陆民航五十六年来的首次台湾之旅。

B．我们能不能迅速走出语文复习的误区，是关系到高考语文成绩提升最重要的大事。

C．对不择手段仿造伪劣产品，坑害消费者利益的不法行为，我们应该给予严厉的打击。

D．日本是地震带，日本的抗震防震知识在关东大地震后开始普及，效果不错。

在下列因素中，影响消费者知觉的主观因素是( )

A．服务内容

B．服务方式

C．刺激强度

D．知识经验

目前我国最大的商业中心是[ ]

A．北京

B．上海

C．天津

D．广州

阅读理解。

     Two students started quarreling at school. One student shouted dirty words at the other, and

a fight (打架) began.

     What can be done to stop fights like this at school? In some schools, the disputants (争执者)

sit down with peer mediators.

     Peer mediators are students with special training (训练) in this kind of problems. Peer mediators

help the disputants to talk in a friendly way. Here are some of the ways they use:

1. Put what you think clearly but don't say any-thing to hurt the other. Begin with"I feel…" instead

of"You always…"

2. Listen carefully to what the other person is saying. Don't stop the other person's words.

3. Keep looking at the other person's eyes when he or she talks.

4. Try to see the other person's side of the prob-lem.

5. Never put anyone down. Saying things like "You are foolish (愚蠢)" makes the talk difficult.

6. Try to find a result that makes both people happy.

     Peer mediators never decide the result or the win-ner. They don't decide who is right and who

is wrong. Instead, they help the two students to find their own"win-win" result. A"win-win" result

can make every-one feel good.

     Peer mediators' work is often successful just be-cause it gets people to talk to each other. And

getting people to talk to each other is the first step in finding a "win-win" result.

1. What can be done when there is a fight at school?

A. The peer mediators and the disputants talk to-gether.

B. The peer mediators decide the winner.

C. The students themselves decide who is the win-ner.

D. The two students sit down and listen to the peer mediators.

2. Peer mediators' work is _____.

A. to give lessons to disputants

B. to help find a way to make both sides happy

C. to find out who starts a quarrel

D. to give students some special training

3. What should you do when the other person is speaking?

A. Try to tell him or her what you think.

B. Think who is right and who is wrong.

C. Listen carefully and look at his or her eyes all the time.

D. Ask the peer mediators as many questions as possible.

4. During the talk, if you say "You are lazy" or "I feel angry", _____.

A. the other person will know he or she is wrong

B. the other person will understand you better

C. it's easy for you to decide who is right

D. it's hard for you to get a "win-win" result

蒸汽管线出现水击必须在水和（）共同存在的条件下产生。

A.蒸汽

B.氮气

C.流动

D.空气