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【单选题】
血管吻合中,原则上A.
先吻合静脉，后吻合动脉；先开放动脉，后开放静脉
B.
先吻合动脉，后吻合静脉；先开放静脉，后开放动脉
C.
先吻合静脉，后吻合动脉；先开放静脉，后开放动脉
D.
先吻合动脉，后吻合静脉；先开放动脉，后开放静脉
E.
都可以
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反馈参考答案：
举一反三
【简答题】A ______ often marks a slight pause in a sentence
【判断题】The fourth and final stage of adaptation, also called “Acceptance” often marks the point when the person feels comfortable in the society and understands how things are done.
A.
正确
B.
错误
【判断题】The coming of the “Four Great Anhui Troupes” to Beijing often marks the birth of Beijing opera.( )
A.
正确
B.
错误
【单选题】A certain type of sentence occurs frequently in one text, and this often marks a particular of the text and also marks a particular function of the text.
A.
style
B.
field
C.
tenor
D.
mode
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