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问题 单项选择题

Littre疝（）

A．疝内容物为部分肠壁 

B．疝内容物为小肠憩室 

C．疝内容物为单个小肠肠管 

D．疝内容物为大网膜 

E．疝内容物为多个小肠肠袢

答案

参考答案：B

填空题

基坑排水按排水时间及性质可分为（）和（）。
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单项选择题

Questions 6 to 10 are based on the following news.

A. Few people expect a breakthrough on reaching an international treaty.
B. The toughest issues on climate change would remain unresolved.
C. The United Nations negotiating process itself is at risk.
D. The United States entered the talks in a p position.
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