问题 单项选择题

风湿性心瓣膜病中二尖瓣狭窄最常见的致死并发症是

A.心律失常
B.充血性心力衰竭
C.栓塞
D.亚急性感染性心内膜炎
E.肺部感染

答案

参考答案:B

解析: 二尖瓣狭窄最常见的并发症有充血性心力衰竭,是瓣膜病的主要致死原因之一;心律失常:以心房颤动最常见,见于50%以上的患者;血栓栓塞:以脑栓塞最多见,其次可见于下肢动脉、肠系膜动脉等;亚急性感染性心内膜炎较少见;肺部感染较常见;急性肺水肿为重度二尖瓣狭窄的严重并发症。

阅读理解

阅读理解。

     "Tipping" (小费) is always a difficult business. You do not want to give too much or too little, or tip

the wrong person.

     In the UK and the USA, people usually tip waiters in restaurants, porters, taxi drivers and hairdressers.

They do not tip people in offices, cinemas, garages or airports.

     Do you invite your friend to the restaurant? Then you pay the bill. Does your friend invite you? Your

friend pays. If there are men and women in the party, the men usually pay.

     These days, men and women are equal (平等) in many ways. If you work in Britain or America, your

boss could be a man or a woman. There are increasing numbers (增长数据) of women in important

positions in politics (政治), law, medicine and in the business world.

     But it is still polite for a man to open doors for women and to ask them to go first. And it is polite for

men to stand up when they are introduced to women. On informal occasions (非正式场合), of course,

everyone is more relaxed.

1. In his passage, the writer tells us           . [ ]

A. not to give any tip to others

B. only to give up to women

C. only to give tip to old men

D. to give tip to the right person

2. If you invite your friends to a restaurant,           .[ ]

A. you should pay the bill

B. your friends should pay the bill

C. the person who orders the meal should pay the bill

D. you should ask your friends to pay the bill

3. Today in Britain and America           . [ ]

A. women are quite equal to men

B. men hold all the important positions in politics

C. women hold all the important positions in business

D. women have changed their conditions in many ways

4. It is polite for a man to           . [ ]

A. sit beside women

B. let women go first

C. stand beside a lady

D. drink for a lady

5. Which is impolite? [ ]

A. To open doors for women.

B. To ask women to go first.

C. To stand up when men are introduced to women.

D. To ask women to pay for a party.

单项选择题