问题 单项选择题 A2型题

中度至重度的肺动脉瓣狭窄首选治疗为()

A.肺动脉瓣扩张术

B.改道手术

C.经皮球囊瓣膜成形术

D.手术解除狭窄

E.以上都不是

答案

参考答案:C

解析:严重肺动脉瓣狭窄(右心室收缩压超过体循环压力)患儿应接受球囊瓣膜成形术,如无该术适应证,则应接受外科瓣膜切开术;轻度肺动脉瓣狭窄(右心室收缩压低于体循环收缩压)如右心室收缩压超过50mmHg,推荐行狭窄解除手术。球囊瓣膜成形术是大多数患儿的首选治疗方法。

阅读理解

阅读理解。

     Computers are very important to modern life. Many people think that in the future computers will be

used in lots of everyday life. It is thought that we won't have to go shopping because we will be able to

get most things sold in shops on the Internet. There will be no more books because we will be able to get

all texts (内容) from computers. The Internet will be used to play games, see films and buy food.Most

telephone calls will be made by computers, too.

     Some people are glad about these new ways of shopping and communicating (交际). Others do not

think that computers will replace (代替) our old ways.

     Let's look at books, for example, some people think that one day we will not read books made of

paper. Instead, we'll buy and read books using computers. We 'll read texts on small pocket computers.

The computers will keep many different books in them at the same time. We won't need to turn lots of

pages and paper will be saved.Computerized (计算机化) books will be used more and more.

     Is Internet shopping such a pleasure as going to the shop? Many people say it is not. It is a pleasure

to go into shops and look at things you want to buy. It is also unlikely (不太可能) that many people will

want to read large texts on our computers. Because paper books will perhaps be more friendly. Maybe

computers won't change these two habits (习惯).

1. In Paragraph1 it is thought people will use computers for ________.

A. playing games,shopping and making telephone calls

B. making telephone calls,having meals and seeing films

C. seeing films,buying food,and going for holidays

D. playing games,making telephone calls and seeing the doctor

2. Which reason (原因) for using computerized books is NOT said in the passage?

A. Computerized books won't be very expensive.

B. Computers can keep many different books in them.

C. We won't have lots of pages.

D. We won't need any paper.

3. Paragraph 4 tells ________.

A. about the old and new ways of shopping and communicating

B. if the Internet will change our habits

C. about computerized books

D. about future uses of computers

4.The title for this passage is ________.

A. Computers Will Replace Shop and Books

B. Computers and the Future

C. Computers will Do Everything for Man

D. How Computers Change Our Habits

单项选择题