单项选择题
A.坐骨结节处B.髂前上棘C.耳郭D.肩胛E.内外踝
A.1/4B.1/3C.1/2D.2/3E.3/4
A.2-4L/minB.4-6L/minC.6-8L/minD.8-10L/minE.10-12L/min