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问题 单项选择题

低渗性脱水的常见病因是

A．急性肠梗阻
B．感染性休克
C．肺炎高热
D．慢性十二指肠瘘
E．挤压综合征

答案

参考答案：D

单项选择题

婴幼儿上呼吸道的解剖特点不正确的为（）

A.管腔狭窄

B.黏膜柔嫩

C.血管丰富

D.鼻窦发育较差

E.咽鼓管呈斜位
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单项选择题

A Trip to the Forest


One day Bob took two of his friends into the mountains. They put up their tents and then rode off to a forest to see how the trees were growing.
In the afternoon when they were about ten kilometres from their camp, it started to snow. More and more snow fell. Soon Bob could hardly see his hands before his face. He could not find the road. Bob knew there were two roads. One road went to the camp, and the other went to his house. But all was white snow. Everything was the same. How could he take his friends back to the camp
Bob had an idea. The horses ! Let the horses take them back ! But what would happen if the horses took the road to his house That would be a trip of thirty-five kilometres in such cold weather!
It was getting late. They rode on and on. At last the horses stopped. Where were they None of them could tell. John looked around. What was that under the tree It was one of their tents!

They could not find their way back because ______.

A．there was only one road to their camp

B．they couldn’t decide which of the two roads led to their tents

C．there were no roads in the mountains at all

D．everything was covered by the white snow
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