% {4 X9 Y6 _: J; n第七题我国铁路的基本知识* P' ^6 n, E+ O) _' \- S+ g(欢迎访问avcar:https://avcar.vip)
目前我国铁路的标准轨距为()" d; O J/ A8 d1 l$ ?' w4 L& N: k(欢迎访问avcar:https://avcar.vip)
A、1345mm B、1543mm C、1435mm ! \7 @' g2 N3 \9 c- G! A" L" w4 n ! J4 K- y- m' z& V第八题食品科学的 ; }, `# f- S2 N- y利用美拉德反应不会() " `4 l, {& Q7 v* O% XA、产生不同氨基酸 B、产生不同的风味 $ _0 [; b8 m3 w1 v2 m7 nC、产生金黄色光泽 D、产生酸味成分 * t) C1 r2 ^3 L/ k! G6 g' L- I/ @/ {6 c7 x; Y7 _3 [) T4 s(欢迎访问avcar:https://avcar.vip)
第九题化学英语题 . T! O5 b' r) W. U8 hWhat is always correct about the molecular ion, M+, in a mass spectrum of a compound?$ n t1 o w' H( B/ I(欢迎访问avcar:https://avcar.vip)
A. The M+ ion peak has the smallest m/z ratio in the mass spectrum. 3 a4 K: p0 U+ S4 jB. The m/z ratio of the M+ ion peak gives the relative molecular mass of the molecule. + E u. g9 I. k9 j, B8 \) W/ yC. The M+ ion is the most stable fragment formed during electron bombardment./ Q: [$ [& i4 d. @/ w7 F# s/ `(欢迎访问avcar:https://avcar.vip)
D. The M+ ion peak has the greatest intensity in the mass spectrum.2 H" B) O! C8 f% \/ t( `$ l) M(欢迎访问avcar:https://avcar.vip)