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问题 单项选择题 A1型题

目前ELISA技术中最常用的底物是

A．邻苯二胺

B．四甲基联苯胺

C．ABTS

D．对硝基苯磷酸酯

E．4-甲基伞酮

答案

参考答案：B

解析：目前ELISA技术中最常用的底物是四甲基联苯胺（TMB）。

多项选择题

下列哪些主题根据专利法第25条第1款第4项的规定不能被授予专利权：（）。

A.动物胚胎

B.动物组织

C.动物生殖细胞

D.转基因植物

E.植物种子

F.马铃薯块茎

G.植物细胞
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单项选择题

A narrowing of your work interests is implied in almost any transition from a study environment to managerial or professional work. In the humanities and social sciences you will at best reuse only a fraction of the material (1) in three or four years’ study. In most career paths academic knowledge only (2) a background to much more applied decision-making. Even with a " training " form of degree, (3) a few of the procedures or methods (4) in your studies are likely to be continuously relevant in your work. Partly this (5) the greater specialization of most work tasks compared (6) studying. Many graduates are not (7) with the variety involved in (8) from degree study in at least four or five subjects a year to very standardized job (9) . Academic work values (10) inventiveness, originality, and the cultivation of self-realization and self-development. Emphasis is placed (11) generating new ideas and knowledge, assembling (12) information to make a " rational " decision, appreciating basic (13) and theories, and getting involved in fundamental controversies and debates. The humanistic values of higher (14) encourages the feeling of being (15) in a process with a self-developmental rhythm. (16) , even if your employers pursue enlightened personnel development (17) and invest heavily in " human capital " —for example, by rotating graduate trainees to (18) their work experiences—you are still likely to notice and feel (19) about some major restrictions of your (20) and activities compared with a study environment.

（18）（）

A.improve

B.introduce

C.vary

D.achieve
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