A.基峰 B.質(zhì)荷比最高的峰 C.偶數(shù)質(zhì)量峰 D.奇數(shù)質(zhì)量峰
A.1個F B.1個Cl C.1個Br D.1個I
A.105 B.120 C.99.2 D.91.9