“西气东输”工程中的“气”是指天然气，其主要成分是甲烷(CH4)。下列有关“CH

Having put down your pens at the end of the college entrance exam, you have ended 12 years of hard study. Forget your studies for a while. It’s time to enjoy yourselves!

There are many ways to celebrate this special month of graduation. You can have photos taken with your classmates and teachers, or dine out together and exchange gifts.

High school students in Western countries such as the United States and Canada usually have a prom to mark their graduation. It’s to mark the time kids turn into young men and women. After the prom, teenagers either go to college or find a job. It means they are no longer as dependent on their parents as they were before.

At the prom, boys usually dress in dinner jackets and bow ties, though many different types of formal clothes are worn. Traditionally, girls give boys matching boutonnieres ( 佩带在扣眼上的花). Girls traditionally wear formal dresses, or dress to shock or be noticed, in shiny or brightly colored materials.

Common prom activities include dining, dancing, the crowning (加冠) of a prom king and queen, and just talking to friends.  In some cases, high school students collect funds for their class prom through the four years of their high school.

High schools in or near large cities may rent ballrooms at expensive hotels or, to be unusual, in a pleasure cruise boat.

But often costs are cut by simply using the school gym. Students make a lot of effort to decorate the gym to make the event special. The music played at the prom will be the most popular kinds, like rock and hip-hop.

The students elect the Prom Queen. She is partnered with a Prom King who is elected similarly. These are great honors that the pair take very seriously. The two dance with each other to celebrate their election.

小题1:The word "prom" is probably closest in meaning with________.

A．a party to celebrate graduation

B．a dancing competition

C．a fashion show

D．an election ceremony小题2:Which of the following is an economical way to hold the prom?

A．Renting a ballroom.

B．Taking a cruise boat.

C．Holding it in the school gym.

D．Wearing informal dresses.小题3: What clearly indicates that prom is very important to students?

A．Music is played at the prom.

B．They take pictures at the prom.

C．The King and Queen dance with each other.

D．They wear formal clothes or special clothes.小题4:For what do the students just talk to friends at a prom?

A．They don’t want to get help from their parents.

B．They will part with their friends in a short time.

C．They don’t like to be accompanied by their parents.

D．They want to be elected by their friends as the Prom King or Queen.小题5:How is the prom significant to the students?

A．They can be relieved from the study pressure.

B．They are going to say goodbye to their friends.

C．They have chances to be elected as the Prom King or Queen.

D．The prom marks the graduation and after it they will be independent.

案例六：2009年周先生每月税前收入12000元，需缴纳10%的三险一金。每月生活日常支出5000元。房贷支出3000元，周先生现有活期存款6万元，定期存款30万元，国债10万元，股票20万元，房贷余额15万元。根据案例六回答96～100题：

年结余比率的参考值为（ ）。

A．10%

B．30%

C．50%

D．70%

“托尔斯泰是俄国革命的镜子”是（）的评语。

A．马克思

B．列宁

C．斯大林

D．恩格斯

下列关于DNA复制的叙述，哪一项是错误的

A．DNA的复制为半保留复制
B．需RNA指导的DNA聚合酶参加
C．为半不连续复制
D．以四种dNTP为原料
E．需DNA指导的DNA聚合酶参加

血中总胆红素量超过多少时，临床出现黄疸

A．＜3.4μmol/L

B．3.4-17.1μmol/L

C．17.1-34.2μmol/L

D．＞34.2μmol/L

E．3.4-6.8μmol/L