燃料在（）内直接燃烧，靠燃气膨胀推动活塞对外作功的机器，称做内燃机。A、气缸 B、泵

患者男，80岁。慢性咳嗽、咳痰10年，近两年来，劳动时出现气短，近两日感冒后病情加重，咳脓痰且不易咳出，查体T：36.8℃，神志清，桶状胸，双肺叩诊过清音，呼吸音低，以慢性支气管炎合并慢性阻塞性肺气肿入院治疗。

对上述患者进行哪项检查有助于确诊（）

A.心电图

B.胸部X线检查

C.痰液检查

D.血气分析

E.脑脊液检查

门腔分流术两天内应注意观察的并发症是（）

A．血管吻合口破裂内出血

B．肝性脑病

C．血小板过于增高

D．肠系膜血管栓塞

E．腹腔感染

阅读理解

     China Daily Oct.11,2008-The Ministry of Health has called for more awareness from the public on

the mental health of the young,  as part of efforts to mark World Mental Health Day which fell on Friday.

     More than 15 percent of Chinese youths have been found with mental problems,  and about 30 million young people under 17 are suffering from depression,  the Shanghaibased Wenhui Daily reported.The

World Health Organization estimates that before 2020,  the rate of children with mental problems will

increase to 50 percent,  and mental problems will become a major factor behind deaths and illness in the

young worldwide.

     Deng Xiaohong,  the spokesperson for the Beijing Municipal Health Bureau,  said rapid social

changes are one of the reasons behind the rising number of youngsters with psychological problems.If

these mental diseases are not addressed on time,  occurrence of crimes,  drugtaking and other dangerous

behavior are expected to rise.Experts said mental diseases could be caused by many factors,  such as the

inability to handle interpersonal  relations well,  unstable emotions and pressures from an overload of

studies.A number of experts have also said the onechild policy is another reason leading to poor mental

health in the young.Children are said to be too "spoiled" and "selfish" in a onechild family.

     It's reported that schools in many cities are rolling out measures to help students maintain their mental

wellbeing.Yin Jingmiao,  a teacher of the Beijing No.105 Middle School,  told China Daily that the

school invites psychologists to provide counseling to students three times a month."Students can be

arranged to have 40minute counseling sessions,  " Yin said.The school also gives lectures on mental health

to senior grade students before they take the national college entrance exams to help ease any anxiety

arising from the tests.

1. Which of the following can be the best title for the passage?

A. Efforts to Mark World Mental Health Day

B. Seriousness of Youngsters'Mental Health Problems

C. How to Maintain Mental Wellbeing

D. Public Awareness on Youngsters'Mental Diseases Expected

2. The writer intends to tell us in the second paragraph that________.

A. mental health problems of the young are becoming a popular problem

B. only young people are suffering from mental health problems

C. mental problems will become as serious as deaths and illness

D. the rate of children with mental problems will increase to 50 percent

3. Which could be the consequence if the problem is left untreated?

A. Inability to handle interpersonal relations.

B. Unstable emotions.

C. Drugtaking and other dangerous behavior.

D. Rapid social changes.

阅读理解

     It may sound strange, but cutting down a real tree for Christmas is actually greener than going with

the artificial kind, one scientist says.

     "It is a little confusing to people," said Clint Springer, a biologist at Saint Joseph's University in

Philadelphia. Because of concerns over deforestation (砍伐森林) around the world, many people

naturally worry that buying a real tree might contribute to that problem. But most Christmas trees for

sale these days are grown not in the forest but on tree farms for the purpose of being cut.

     Moreover, from the viewpoint of greenhouse gases, real trees are "the obvious choice". Live trees

actively release oxygen as they grow, and meanwhile remove carbon dioxide from the atmosphere.

After they have been cut and Christmas is over, they're usually cut into smaller pieces for mulch (覆

盖物). As mulch, the bits of trees very slowly release carbon dioxide back into the atmosphere. So in

the end, a real Christmas tree is carbon neutral, putting the same amount of carbon dioxide back into

the air as it took out (although much more slowly).

     The tree farms that grow the trees also replant after the trees are cut. Artificial trees, on the other

hand, don't come out even in the carbon balance. Petroleum (石油) is used to make the plastics in

artificial trees and lots of carbon dioxide-creating energy is required to make and transport them.

Because these trees just end up in the places where waste is buried under the ground after use, "those

greenhouse gases are lost forever," Springer said.

1. The author presents the text mainly by       .

A. giving descriptions

B. making comparisons

C. listing figures  

D. analyzing different opinions

2. Real trees for Christmas are better than artificial trees probably because       .

A. real trees cost buyers less money  

B. real trees are more beautiful

C. real trees don't cause any pollution

D. real trees can be used for a longer time

3. The underlined part "carbon neutral" in the third paragraph can be best replaced by "      ".

A. not releasing more carbon

B. absorbing carbon dioxide

C. causing much waste

D. releasing carbon dioxide

4. The purpose of the text is to tell us       .

A. the reasons for using real trees for Christmas

B. the environmental protection tips for Christmas

C. how to choose artificial Christmas trees

D. how to spend a much greener Christmas

己内酰胺装置蒸发岗位三个塔按内部结构分同属于筛板塔。