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问题 单项选择题

急性左心衰患者体位最好是（）

A.坐位，双腿下垂

B.半卧位

C.侧卧位

D.平卧位

E.头低脚高位

答案

参考答案：A

补全对话，情景问答
根据所  给句子,选择最佳的应答语每个项只能用一次。
( ) 1. I think zoos are good places for animals.
(     ) 2. What can we do to protect our environment?
(     ) 3. We should give up using paper napkins.
( ) 4. Have you ever heard that our houses can be made by some trash?
( ) 5. Look at that strange wall. What's it made of?
A. We can tell people to save water and not to throw rubbish everywhere.
B. No. I have never heard of it.
C. Oh, It's made of old glass bottles that are glued together.
D. Our environment is becoming worse and worse.
E. I disagree with you. They are bad for animals.
F. I know. I stopped using them last year.
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单项选择题

某建设项目废气中S02的等标排放量是5.3×108，且该项目位于平原地区，则该项目大气的评价等级为( )。

A．一级

B．二级

C．三级

D．四级
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