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问题 问答题 简答题

简述食管的3个生理性狭窄。

答案

参考答案：

(1)在环状软骨下缘平面，即食管入口处；

(2)在主动脉弓水平位，有主动脉和左支气管横跨食管；

(3)在食管下端，即食管穿过膈肌裂孔处。

单项选择题

In the dining room of my grandfather’ s house stood his heavy clock. Meals in the dining room were a (21) for our four generations to become one. My grandfather’ s clock always stood like a trusted old family friend, (22) us playing jokes and tellingstories, which was already a (23) of our life.

When I was a child, the old clock interested me. I watched and listened to it during (24) I was surprised how at (25) times of the day, the clock would strike three times, six times or more, with a wonderful great (26) that echoed throughout the house. The clock chimed year after year, a part of my (27) , a part of my heart.

Even more (28) to me was my grandfather’s special action each day. He meticulously (29) the clock with a special key each day. The key was magic to me. It (30) our family’ s magnificent clock ticking and striking all year round.

26（）

A.seeing 

B.hearing 

C.watching 

D.looking
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选择题

Thank you so much. You ________ me from an embarrassing situation. [ ]

A. remember  

B. recover

C. rescue  

D. reserve
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