潮气量为500ml,呼吸频率为12/min,无效腔气量为150ml,则肺泡通气量约为()
A.3.5L
B.4.2L
C.5.0L
D.6.0L
E.6.8L
参考答案:B
--- I’m sorry to keep you waiting. I’ll make short work of this.
--- ______. I’m not in a hurry.
A. Take it easy.
B. Take your time.
C. Not at all
D. Do as you like.
业务处理中的批处理和实时处理分别指什么?各自有什么优缺点?