. y: i. B! Q% C$ F, [第七题我国铁路的基本知识. G5 C3 ?" w2 z0 i5 A$ S0 P/ g(欢迎访问avcar:https://avcar.vip)
目前我国铁路的标准轨距为() 9 W! U; ]3 O" a0 v" V7 AA、1345mm B、1543mm C、1435mm/ t! i6 W H9 Q(欢迎访问avcar:https://avcar.vip)
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第八题食品科学的; z. D5 d2 V `! B(欢迎访问avcar:https://avcar.vip)
利用美拉德反应不会() 2 v1 @/ i2 W! Q: g# zA、产生不同氨基酸 B、产生不同的风味1 h4 N+ K) g, m(欢迎访问avcar:https://avcar.vip)
C、产生金黄色光泽 D、产生酸味成分5 G. S _$ E* k9 d$ A1 o(欢迎访问avcar:https://avcar.vip)
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第九题化学英语题. k- M: ?. U) Q( x1 ](欢迎访问avcar:https://avcar.vip)
What is always correct about the molecular ion, M+, in a mass spectrum of a compound? $ j# p0 Z7 s+ K1 ^! iA. The M+ ion peak has the smallest m/z ratio in the mass spectrum.* E7 p1 Q; F& f2 {8 ~(欢迎访问avcar:https://avcar.vip)
B. The m/z ratio of the M+ ion peak gives the relative molecular mass of the molecule. 8 T1 m1 V( I/ O! D$ B: s4 BC. The M+ ion is the most stable fragment formed during electron bombardment. 3 f: d5 {+ {3 ` ~0 J$ DD. The M+ ion peak has the greatest intensity in the mass spectrum./ k% w6 q C4 {(欢迎访问avcar:https://avcar.vip)