试题与答案

多数皂苷水溶液强烈振摇能产生持久性泡沫,是因为() A.皂苷分子内亲脂性苷元和亲水性

题型:单项选择题 A1/A2型题

题目:

多数皂苷水溶液强烈振摇能产生持久性泡沫,是因为()

A.皂苷分子内亲脂性苷元和亲水性糖达到平衡状态降低了水溶液的表面张力

B.皂苷分子内亲脂性苷元和亲水性糖达到平衡状态增加了水溶液的表面张力

C.皂苷分子内亲水性苷元和亲脂性糖达到平衡状态降低了水溶液的表面张力

D.皂苷分子内亲水性苷元和亲脂性糖达到平衡状态降低了水溶液的表面张力

E.以上说法都不对

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:本题考核的是建设工程项目质量目标的决定依据。业主的需求和法律法规的要求,是决定建设工程项目质量目标的主要依据。

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B.she was being followed

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B.she is followed by a stranger for a long time.

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