瘢痕性幽门梗阻A．呕吐物为食物，无胆汁B．频繁呕吐少量不含胆汁

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问题单项选择题

瘢痕性幽门梗阻

A．呕吐物为食物，无胆汁
B．频繁呕吐少量不含胆汁液体
C．喷射状呕吐大量不含食物的胆汁
D．呕吐食物和胆汁
E．呕吐酸臭宿食

答案

参考答案：E

选择题

—Look, there_____ many birds around here, but now we hardly see them. What a pity!

—Yeah! The air pollution has caused the problem!

A．are

B．used to have

C．used to be

D．use to be

单项选择题

青蛙从深16米的水池向上跳，每天白天跳上7米，夜间又下滑4米，问这只青蛙几天可以跳出水池( )

A．6

B．5

C．4

D．3