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问题 单项选择题

患者男性，40岁，间歇性吞咽困难1年，X线钡剂检查示食管下段呈光滑乌嘴样狭窄。首先考虑的诊断是

A．反流性食管炎

B．食管癌

C．食管静脉曲张

D．贲门失弛缓症

E．食管平滑肌瘤

答案

参考答案：D

选择题

— Could you tell me_____ ?              

— About half an hour.

A．how long it takes to walk to the Science and Technology Museum from school

B．how long it took to walk to the Science and Technology Museum from school

C．how far was it to walk to the Science and Technology Museum from school

D．how far it was to walk to the Science and Technology Museum from school
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单项选择题

Rb肿瘤生长方式包括（）

A.内生性

B.外生性

C.多灶性

D.弥漫浸润性

E.以上均是
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