问题 单项选择题 A1/A2型题

关于气管、支气管正位体层的叙述,错误的是 ()

A.以胸骨角中点(气管分义)为定位点

B.胸骨角处胸厚1/2为气管层面

C.气管层面减1.5cm为左主支气管

D.气管层面减0.5cm为右主支气管

E.层间距取2.5cm上下各取1~2层

答案

参考答案:E

解析:关于气管、支气管正位体层摄影,层间距应为0.5cm。

阅读理解

阅读理解

     Being able to multitask-doing several things at the same time-is considered a welcome skill by

most people. But if we consider the situation of the young people aged from eight to eighteen, we should

think again.

     What we often see nowadays is that young people juggle an ever larger number of electronic devices

as they study. While working, they also surf on the Internet, send out emails, answer the telephone and

listen to music on their iPods. In a sense, they are spending a significant amount of time in fruitless efforts

as they multitask.

     Multitasking is even changing the relationship between family members. As young people give so

much attention to their own worlds, they seem to have no time to spend with the other people around

them. They can no longer greet family members when they enter the house, nor can they eat at the family

table.

     Multitasking also affects young people's performance at university and in the workplace. When asked

about their opinion of the effect of modern gadgets on their performance of tasks, many young people

gave a positive response. However, the response from the worlds of education and business was not

quite as positive.

     Educators feel that multitasking by children has a serious effect on later develop-ment of study skills.

They believe that many college students now need help to improve their study skills. Similarly, employers

feel that young people entering the job market need to be taught all over again, as modern gadgets have

made it unnecessary for them to learn special skills to do their work.

1. What does the underlined word "juggle" in Paragraph 2 most probably mean?

A. Want to buy.

B. Take the place of.

C. Use at the same time.

D. Seek for information from.

2. In Paragraph 3, the author points out that  ________.

A. family members do not eat at the family table.

B. family members do not greet each other.

C. young people live happily in their families

D. young people seldom talk with their family members

3. What is the main idea of the last paragraph?

A. multitasking is harmful to young people's development.

B. Young people benefit a lot from modern gadgets.

C. Multitasking is an important skill to young people.

D. Yong people must learn skills for future jobs.

4. The author develops the passage mainly by ________.

A. providing typical examples

B. following the natural time order

C. comparing opinions from different fields

D. presenting a cause and analyzing its effects

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