咯血与呕血的区别下述哪项不正确A．咯血前有咳嗽，呕血前常有恶心症状B．咯血血色鲜红，呕血常呈暗红色C．咯血为酸性，呕血为碱性D．咯血较少伴有黑...

作者: rantiku 人气: - 评论: 0

问题咯血与呕血的区别下述哪项不正确

选项 A．咯血前有咳嗽，呕血前常有恶心症状 B．咯血血色鲜红，呕血常呈暗红色 C．咯血为酸性，呕血为碱性 D．咯血较少伴有黑便，呕血常有 E．咯血常混有痰液，呕血则混有食物残渣

答案 C

解析

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