Last year he had an opportunity _____ ab

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问题选择题

Last year he had an opportunity _____ abroad, but he gave it up. [ ]

A. study

B. to study

C. of study

答案

答案：B

单项选择题

上消化道内镜检查时正确的麻醉方法是（）

A.检查前5-10min用2％利多卡因喷雾咽部6～8次

B.检查前1h用2％利多卡因喷雾咽部2～3次

C.检查前30min用2％利多卡因喷雾咽部2～3次

D.检查前5～10min用2％利多卡因50mg吞服

E.检查前5～10min用2％利多卡因喷雾咽部2～3次

单项选择题

左颈部淋巴结转移性鳞癌的原发部位最可能是（）。

A.鼻咽癌

B.甲状腺

C.胃

D.乳腺

E.肝