A.
B.
C.
D.
[单选题]A.B.C.D.
[单选题]A.子核B.α衰变C.母核D.β-衰变E.衰变能
[单选题]A.低浓度氧疗B.无创机械通气C.有创机械通气D.高浓度氧疗E.中浓度氧疗
[单选题]A.1/3B.2/3C.1D.4/3