临床上最常见的慢性呼吸衰竭病因是A．重症肺结核B．呼吸肌病变C

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问题单项选择题

临床上最常见的慢性呼吸衰竭病因是

A．重症肺结核
B．呼吸肌病变
C．严重胸廓畸形
D．慢性阻塞性肺疾病
E．神经系统病变

答案

参考答案：D

解析：临床上将具有气道阻塞特征的慢支和肺气肿统称为慢性阻塞性肺疾病 (COPD)，其发病机制至今尚未明了，以呼吸困难进行性加重、慢性咳嗽咳痰为主要症状，晚期常可出现呼吸衰竭。

填空题

根据短文内容和首字母提示完成单词，并将单词完整的写在后面的横线上。

We live in the "(1)c age". Just 41 years ago, computers couldn't do much. They were very big

and (2)e . They used a lot of energy (能量). Only a few people were interested in them. Today

computers are smaller and (3)c . They can do much difficult (4)w .

Computers become important for many reasons (原因). They work (5)f than man and make

few mistakes. They can "remember" much information. A computer can do millions (百万) of problems in

a few seconds. A person might need years to work (6)o so many problems.

People now use computers in every (7)k of work. Computers are very useful and the use of

computers is growing. More computers mean more jobs for people, because people need to run (操作)

and mend (修理) them. Would you like to learn (8)h to run a computer?

判断题

投料机刮料板不动作并处于压下状态时，是不影响液面的。