题目内容

除去中药中多糖常用( )法

A. 酸减法
B. 水醇法
C. 醇醚法
D. 活性炭
E. 盐析法

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The company at which Mark is employed has 80 employees, each of whom has a different salary. Mark’s salary of $43,700 is the second-highest salary in the first quartile of the 80 salaries. If the company were to hire 8 new employees at salaries that are less than the lowest of the 80 salaries, what would Mark’s salary be with respect to the quartiles of the 88 salaries at the company, assuming no other changes in the salaries

A. The fourth-highest salary in the first quartile
B. The highest salary in the first quartile
C. The second-lowest salary in the second quartile
D. The third-lowest salary in the second quartile
E. The fifth-lowest salary in the second quartile

The fabric needed to make 3 curtains sells for $8. 00 per yard and can be purchased only by the full yard. If the length of fabric required for each curtain is 1.6 yards and all of the fabric is purchased as a single length, what is the total cost of the fabric that needs to be purchased for the 3 curtains()

A. $40.00
B. $38.40
C. $24.00
D. $16.00
E. $12.80

最后馏出的是( )

A. 单萜烯
B. 单萜酸
C. 单萜醇
D. 单萜醚
E. 倍半萜
F. 采用分馏法分离上述化合物时,馏出顺序为

3%~5%碱溶液洗脱得到( )

A. 糖
B. 皂苷
C. 有机酸
D. 生物碱
E. 甾体苷元
F. 用大孔吸附树脂分离中药成分时

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