COPD患者出现低氧血症最常见的机制是() A.肺泡通气量下降 B.弥散功能障碍 C 发布时间:2018-03-03 15:33 │ 来源:www.tikuol.com 题型:单项选择题 问题: COPD患者出现低氧血症最常见的机制是()A.肺泡通气量下降B.弥散功能障碍C.右向左分流D.呼吸肌疲劳E.通气/血流比例失衡
题型:单项选择题 Uncle John _____ his hometown for twelve years. [ ]A. left B. has leftC. has gone D. has been away from 查看答案