呼吸频率加倍，潮气量减半时，将使 ( )
A．每分通气量增加
B．肺泡通气量增加
C．肺泡通气量不变
D．每分通气量减小
E．肺泡通气量减少
参考答案：E
He must have been working really hard these days. This morning, I even noticed ______ behind his ears.
A．grey hair
B．grey hairs
C．the grey hair
D．much grey hair
过量静脉使用甘露醇脱水治疗，最常见的严重并发症是（）
A.高渗性脱水
B.急性肾衰竭
C.心力衰竭
D.急性肺水肿
E.溶血
