单项选择题

The  NMR spectra of the same compound were determined on a 60 MHz instrument and a 300 MHz instrument. The resonance frequencies of the same hydrogen nuclei measured on both instruments are ____; The H-H coupling constants of measured on both instruments are____.
A、the same, different;
B、the same, the same;
C、different, different;
D、different, the same.

题目列表

你可能感兴趣的试题

问答题

公务员考试常识题库及答案(第25001-25500题)-3

答案: 25087、以下哪项不属于国共内战的三大战役?正确答案:延安战役,
25088、波斯湾战争发生在哪一年?正确答案...
微信扫码免费搜题