问题 单项选择题

主动脉瓣重度狭窄的超声心动图定量指标是

A.瓣口面积<0.7cm2

B.瓣口面积<1.1cm2

C.瓣口面积<1.2cm2

D.瓣口面积<1.5cm2

E.瓣口面积<2.0cm2

答案

参考答案:A

解析:
轻度狭窄时瓣口面积1.6~1.1cm2;中度狭窄瓣口面积1.0~0.75cm2;重度狭窄瓣口面积小于0.75cm2

阅读理解

根据下面短文的内容判断下列句子的正误,正确的用“A”表示,错误 的用“B”表示。

     Computer technology has become an important part of people's life. This technology has its own

special words. One well-known computer word is Google. It is the name of a popular "search

engine (引擎)" for the Internet. People use the search engine to find information about al- most any

subjcct on the Internet. The people who started the company named it Google because m math google

is a very large number—one hundred zeros follow the number one. When you "Google" a subject, you

can get a lot of information about it.

     If you Google someone, you might find that person's name on a blog. A blog is short for a Web log.

It is a personal web page. Some people write blogs to express their opinions and ideas over the Internet.

Some use them to share their lives with faraway friends or family. Others write blogs to help them deal

with sickness, money problems or to choose movies to see or books to read. Some people add information

to their blogs every day. People who have blogs are called bloggers.

( )1. Google and Blog are two kinds of popular search engines.

(     )2. One can use Google to search the Internet for all information he wants.

( )3. People may use Google to share their opinions or ask others for help.

(     )4. Bloggers ought to add information to their blogs every day.

( )5. From the passage we can infer (推断) that computer technology is changing people's life.

填空题