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问题 单项选择题

哪种病变应首选覆膜支架治疗（）

A.食管炎性狭窄

B.幽门良性梗阻

C.食管癌术后吻合口狭窄

D.贲门失弛缓症

E.不宜手术治疗的食管癌造成的食管狭窄且并发气管瘘

答案

参考答案：E

填空题

根据句意及首字母提示完成句子。

1. I got a g________ from my parents on my thirteenth birthday.

2. Last Sunday, we went to the a________ to see the seals.

3. You can often see local kids h________ out at the mall.

4. This is a p________ of my family. We took it last year.

5. Will you buy me s________ when you visit Hong Kong?
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单项选择题

测量与变压器铁芯绝缘的各紧固件的绝缘电阻，须在变压器（）进行。

A.安装施工过程中

B.安装竣工后

C.运行一段时间后
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