单项选择题
A.1.12MeV,0.89MeVB.0.112MeV,0.89MeVC.0.112MeV,8.9MeVD.1.12MeV,8.9MeV
A.78eV ,49eVB.0.78eV ,4.9evC.7.8eV ,49eVD.0.78eV ,49eV