( f0 {& U' O% q" j0 H; v3 w第九题化学英语题 - o( L+ z( _1 a5 l7 V8 S7 @3 sWhat is always correct about the molecular ion, M+, in a mass spectrum of a compound? % b( y8 A+ k) j1 nA. The M+ ion peak has the smallest m/z ratio in the mass spectrum. 7 d. {4 r, M" Z3 ]" k- bB. The m/z ratio of the M+ ion peak gives the relative molecular mass of the molecule.7 {( W' z. V+ F(欢迎访问avcar:https://avcar.vip)
C. The M+ ion is the most stable fragment formed during electron bombardment. 9 k; X& L7 C" F; tD. The M+ ion peak has the greatest intensity in the mass spectrum. 7 I0 Y" Z& r; p4 q) f 7 T* g! w; n) X# j5 C! e第十题采矿学 . ?4 Z( K+ K4 Z b/ p. p2 N根据所含金属种类不同,金属矿石可分为:______、 ______、 ______、______、和______。