A.氟烷 B.恩氟烷 C.異氟烷 D.七氟烷 E.地氟烷
A.15%~19% B.20%~30% C.31%~40% D.41%~50% E.51%~60%
A.胸7-8 B.胸7-10 C.胸6-8 D.胸8-10 E.胸6-9