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91下腔静脉阻塞导致胸壁静脉曲张时,血流的方向为:( )

单选题
2021-09-06 21:10
A、自下而上
B、自上而下
C、乳头下自上而下
D、乳头上自下而上
E、上下流动,毫无规则
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正确答案
A

试题解析

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下腔静脉阻塞导致胸壁静脉曲张时,血流的方向为:( )
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