問題詳情

18. An NMR spectrometer that operates at a frequency of 60 MHz for C NMR spectra, operates at what frequency for H NMR spectra?
(A) 15 MHz
(B)30MHz
(C) 60 MHz
(D)120 MHz
(E)240 MHz

參考答案

答案：E
難度：困難0.333333
統計：A(0),B(1),C(0),D(0),E(1)