第13题: [单项选择]阻塞性肺气肿,发生低氧血症的主要机制() A. 膈肌运动幅度降低 B. 胸部活动受限 C. 肺活量减少 D. 肺总量减少 E. 通气/血流比例失调 参考答案:E 答案解析:肺气肿患者的肺组织弹性减退,肺泡持续扩大、回缩障碍,残气量占肺总量的百分比增加。肺泡周围毛细血管受肺泡膨胀的挤压而退化,致使毛细血管大量减少,肺泡间的血流量减少,此时肺区虽然有通气,但血流灌注减少,导
第15题: [单项选择]According to Salah, continual terrorist attacks were caused by______. A. the secular criticism B. the religious criticism C. the anger over the government’s corruption D. the antagonistic feelings against the West 参考答案:D