题目内容

TR

A. 相对迁移率(Rm)
B. 比移值(Rf值)
C. 分配系数
D. 容量因子
E. 保留时间

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Why did Hadisiko hasten to add "his companies also hold modern personnel management systems "

A. He thought Mysticism was not so good as expected.
B. He wanted to show they too focused on qualifications.
C. He wanted to mean they only hired qualified persons.
D. He wanted to indicate the possibility of combination of the scientific management with religion.

The writer of the article does not express the view, either directly or by implication, that ______.

A. sharply defined classifications of taste are needed
B. more research should be done regarding the molecular constituency of food
C. food values are objectively determined by an expert "smeller"
D. temperature is an important factor in the value of food

Van Deemter方程

A. 塔板高度与流动相流速关系式
B. 流动相需要高压泵才能输送
C. 电场强度增大,分离趋于完全
D. 十八烷基硅烷键合硅胶
E. 甲基硅橡胶SE-30或OV-1

我国人均林地面积不到世界人均水平的( )。

A. 50%
B. 40%
C. 30%
D. 20%

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