严格责任是指什么？
参考答案：
指一种比没有尽到合理的注意而应负责的一般责任标准更加严格的一种责任标准。
A: Good morning, sir! Can I 1 you?
B: Yes, I’d like to buy a copy of 21st Century.
A: Here you are.
B: Thank you. 2 much is it?
A: Just one yuan. Do you want anything _ 3 ?
B: Yes, a copy of China Daily.
A: The English newspaper?
B: Yes.
A: Oh, sorry. They are sold 4 .
B: Do you have China Youth Daily?
A: Of course! Here you are.
B: OK! I’ll take 5 of them.
在胸部平片上，无肺血增多表现的是（）
A.室间隔缺损
B.肺动脉狭窄
C.房间隔缺损
D.二尖瓣关闭不全
E.动脉导管未闭
