题目内容

疝囊颈位于腹股沟韧带下方,股静脉内侧的是

A. 腹股沟斜疝
B. 脐疝
C. 股疝
D. 白线疝
E. 腹股沟直疝

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最可能的诊断是

A. 克罗恩病
B. 肠多发性息肉
C. 结肠黏膜相关性淋巴瘤
D. 肠结核
E. 溃疡性结肠炎

色谱-质谱联用(GC-MS)要解决的关键问题是如何将MS的真空度降低,以和GC的真空度相匹配。( )

联用技术是将两种或两种以上分析技术相联接,互相补充,从而完成复杂的分析任务。( )

According to Paragraph 5, when one is in the second stage of culture shock, one

A. is polite and gracious to foreigners
B. makes jokes about the host culture
C. finds the native people unsympathetic
D. enjoys the customs of the host culture

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