A.110~130次/分 B.140~160次/分 C.90~110次/分 D.70~90次/分 E.60~70次/分
A.10~20L/min B.5~10L/min C.3~4L/min D.2~3L/min E.1~2L/min
A.70% B.60% C.50% D.40% E.30%