level 9
菜刀打马花 对面战力不是高太多的话根本活不过两回合啊
2021年01月03日 07点01分
1
level 12
年轻人不要在网上晒自己, 要多多学习提升自己的知识才是正事! 那么,让我来考考你化学,是英语题哟,还可以提高你的英语能力!
What is always correct about the molecular ion, M+, in a mass spectrum of a compound?
A. The M+ ion peak has the smallest m/z ratio in the mass spectrum.
B. The m/z ratio of the M+ ion peak gives the relative molecular mass of the molecule.
C. The M+ ion is the most stable fragment formed during electron bombardment.
D. The M+ ion peak has the greatest intensity in the mass spectrum.
2021年01月03日 07点01分
3
level 13
年轻人不要在网上晒自己, 要多多学习提升自己的知识才是正事! 那么,让我来考考你化学,是英语题哟,还可以提高你的英语能力!
What is always correct about the molecular ion, M+, in a mass spectrum of a compound?
A. The M+ ion peak has the smallest m/z ratio in the mass spectrum.
B. The m/z ratio of the M+ ion peak gives the relative molecular mass of the molecule.
C. The M+ ion is the most stable fragment formed during electron bombardment.
D. The M+ ion peak has the greatest intensity in the mass spectrum.
2021年01月03日 11点01分
4