单项选择题
A.50~70mlB.60~80mlC.70~90mlD.80~100ml
A.155~175mlB.165~185mlC.175~195mlD.175~190ml
A.0.5~1.5L/minB.0.5~1.0L/minC.1.5~2.0L/minD.1.5~2.5L/min