单项选择题
A.2436keVB.2.436keVC.24.36keVD.243.6keV
A.9-/2,1.4hB.9+/2,14hC.9+/2,1.4hD.9-/2,14h
A.1.12MeV,0.89MeVB.0.112MeV,0.89MeVC.0.112MeV,8.9MeVD.1.12MeV,8.9MeV