白喉多由以下哪种病证所致()
A.肾阴亏损,虚火上炎
B.肺胃热毒伤阴
C.湿热蕴毒上壅
D.肺胃气液两虚
E.疫毒上攻
参考答案:B
—Must I go and do now?
—No, you______. We still have two more days. [ ]
A. shouldn't
B. can't
C. needn't
D. won't
如果呼吸的潮气量减小50%,同时呼吸的频率增加1倍,其结果是( )。
A.肺的通气量增加
B.肺泡通气量不变
C.肺泡通气量增加
D.肺泡通气量减少
E.肺的通气量减少