单项选择题
A.5-10mmhgB.2-8mmhgC.10-20mmhgD.10-30mmhg
A.100次/分;4-5cmB.90-100次/;4-5cmC.100次至120次/分;5-6cmD.120-130次/分;5cm
A.25mlB.30mlC.40mlD.50ml