第32题: [单项选择]慢性支气管炎并发肺气肿时,最早出现的病理生理改变是() A. 时间肺活量降低 B. 生理无效腔气量增大 C. 通气血流比例失调 D. 残气占肺总量百分比增加 E. 低氧血症 参考答案:A 答案解析:慢性支气管炎并发肺气肿时,早期由于病变仅局限于细小气道,随着深吸气时胸腔内压升高,在迅速用力呼气时,压迫原来已有通气阻塞的小气道,导致用力呼出气量减少,即时间肺活量(或称用力肺活量)降低。病情加重后,
第35题: [单项选择]It is very plain that such a life as this is far more ______ to health than that of the man who can afford little leisure for necessary rest in the course of the day. A. conductive B. constructive C. conciliate D. conducive 参考答案:D 答案解析:be conducive to...有益于……;conductive传导的;constructive建设性的;conciliate安慰,赢得,调和。