问题 单项选择题 1.0

关于肺脓肿的病因及特征,下列选项正确的是()

A.急性肺脓肿以需氧菌感染占多数

B.吸入性肺脓肿最为常见

C.吸入性肺脓肿常为多发性

D.血源性肺脓肿的致病菌以链球菌最常见

E.支气管异物呼吸道阻塞是导致成人肺脓肿的重要因素

答案

参考答案:B

解析:急性肺脓肿以厌氧菌感染占多数,而非需氧菌感染占多数,故排除A;吸入性肺脓肿常为单发性,而非多发性,排除C;血源性肺脓肿的致病菌以金黄色葡萄球菌最常见,而非链球菌最常见,故排除D;支气管异物呼吸道阻塞是导致小儿肺脓肿的重要因素,而非导致成人肺脓肿的重要因素,故排除E;肺脓肿有吸入性、血源性和继发性三种类型,而以吸入性肺脓肿最为常见,故选B。

问答题
阅读理解

Have you ever noticed what happens to an idea once you express it?Just talking about it or writing it down causes you to make it clear in your own mind. How can you use this to increase your brain power?Start writing.

By putting thoughts into words,you are telling yourself the logic behind what you think,feel,or only partly understand. Often,explaining a thought is the process of understanding. In other words,you increase your brain power by exercising your “explain power”.

Another benefit of writing is that it helps you remember. Many,if not most,highly productive people are always taking notes. You can try keeping it all in your head,but if you keep a journal(日志)of your ideas the next time you’re working on a big project,you’ll probably have more success.

Want to understand a topic?Write a book about it. That’s an extreme example,but if you are learning something new,write a letter to a friend about it,and you will understand it better. Want to invent something?Write an explanation of the problem—why you want to solve it,and why it is worth solving,and you’re half­way there.

Writers don’t always write because they clearly understand something beforehand. Often,they write about something because they want to understand it. You can do the same. Writing will help bring you to an understanding. Give it a try.

小题1:What would be the best title for the passage?

A.A Way on How to Write

B.Increase Your Brain Power Through Writing

C.Brain Power Helps Improve Your Writing

D.How to Start Your Writing小题2:According to the passage,writing can help you a lot except________.

A.to increase your brain power

B.to improve the ability to remember

C.to develop your interest in study

D.to strengthen the understanding of a topic小题3:If a writer writes something,it means that he or she________.

A.has understood it very well

B.needs to understand it better

C.wants to remember it in his or her mind

D.is testing his or her new ideas小题4:The underlined sentence“you’re half­way there”in the fourth paragraph means that________.

A.you are already successful

B.there’s a long way for you to go to reach your goal

C.you are left wondering what to do

D.you have been on the way to success