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问题 单项选择题

空肠中下段及回肠闭锁发病原因以下哪项不恰当（）

A.胎儿期腹膜炎

B.胎儿期肠套叠

C.胎儿肠管充实期空化不全

D.胎儿期肠扭转

E.胎儿期坏死性小肠炎

答案

参考答案：C

选择题

Once a reporter receives his assignment from the chief-editor, he has to ______ on his work and tries his best to work on it until the chief-editor ______ it.  [ ]

A. fix his attention; approves  

B. focus; proves of  

C. concentrate; approves of  

D. get down; approves
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单项选择题

“省”在古代汉语中的意思是（）。

A、节省

B、行政机构

C、从属

D、邦国
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