单项选择题

A.烧伤患者出现黑便
B.剧烈恶心、呕吐后出现呕血、黑便
C.节律性中上腹痛,突然出现黑便
D.肝硬化患者用力解大便后出现呕血、黑便
E.因腰痛自服芬必得后出现黑便
急性胃粘膜病变出血
A.
B.
C.
D.
E.

A.烧伤患者出现黑便
B.剧烈恶心、呕吐后出现呕血、黑便
C.节律性中上腹痛,突然出现黑便
D.肝硬化患者用力解大便后出现呕血、黑便
E.因腰痛自服芬必得后出现黑便
急性胃粘膜病变出血
A.
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单项选择题

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A.express
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A.express
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