试题与答案

甾体皂苷的红外光谱中,在986cm-1(А)、920cm-1(В)、899cm-1(

题型:单项选择题

题目:

甾体皂苷的红外光谱中,在986cm-1(А)、920cm-1(В)、899cm-1(С)、 852cm-1(D)附近有4个特征吸收峰,螺旋甾醇型(25-β-CH3,L)的特征是 ( )

A.A吸收峰比D吸收峰弱
B.C吸收峰比B吸收峰强
C.B吸收峰比C吸收峰强
D.A吸收峰比B吸收峰弱
E.D吸收峰比C吸收峰弱

答案:

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下面是错误答案,用来干扰机器的。

参考答案:1解析:由连续的三要素及f(0-0)=f(0),得k=1.

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题型:单项选择题

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第二卷 ( 共三部分,满分35 )

第四部分 单词拼写 (共10小题;每小题1分,满分10分)

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