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【单选题】

从中药水提液中萃取皂苷的最佳溶剂是

A.
甲醇
B.
正丁醇
C.
乙醚
D.
三氯甲烷
题目标签:皂苷溶剂最佳
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参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】可以区别甾体皂苷和甾体苷元的反应是

A.
醋酐.浓硫酸反应
B.
Kedde反应
C.
Molish反应
D.
NIg-HCl反应
E.
K-K反应

【单选题】最佳修复方案是

A.
直接改为活动义齿修复
B.
采用种植固定义齿修复
C.
全冠修复基牙后再改为活动义齿修复
D.
增加前端基牙数再行固定修复
E.
增加前端基牙数目再行固定活动联合修复

【单选题】人参皂苷是()。

A.
甾体皂苷 
B.
蒽醌苷  
C.
强心苷 
D.
黄酮苷
E.
三萜皂苷

【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (裁判) decisions that denied victory to their team. A researcher was appointed to study the performanc...

A.
The ideal retirement age for an experienced football referee is 35.
B.
Age should not be the chief consideration in choosing a football referee.
C.
A football referee should be as young and energetic as possible.
D.
An experienced football referee can do well even when in poor physical condition.

【单选题】柴胡皂苷是()

A.
I型柴胡皂苷
B.
Ⅱ型柴胡皂苷
C.
Ⅲ型柴胡皂苷
D.
Ⅳ型柴胡皂苷
E.
V型柴胡皂苷