试题与答案

红外分光光度法测定总萃取物和石油类的含量，波数2930cm-1条件下测定的是（）基团

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题目：

红外分光光度法测定总萃取物和石油类的含量，波数2930cm-1条件下测定的是（）基团中C-H键的伸缩振动。

A．CH2

B．CH3

C．芳香环

答案：

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