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【多选题】
红外光谱产生的条件是A.
红外辐射能量等于分子振-转级跃迁的能量
B.
振动能级由基态跃迁至第一激发态
C.
分子振动必须是红外活性的
D.
分子振动时偶极矩不发生变化
E.
红外分光光度计的分辨率要高
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