25.下列質譜的離子化方法中,何者最不易提供化合物之分子量?
(A)chemical ionization
(B)electrospray ionization
(C)fast atom bombardment ionization
(D)electron impact ionization
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統計: A(347), B(654), C(545), D(3427), E(0) #2969509
統計: A(347), B(654), C(545), D(3427), E(0) #2969509