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【单选题】
表皮中增殖能力最强的是A.
基底层
B.
棘细胞层
C.
颗粒层
D.
角质层
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举一反三
【单选题】History is a record of mankind different historians, __________, interpret it differently.
A.
therefore
B.
on the contrary
C.
however
D.
consequently
【单选题】From the last sentence of the second paragraph we learn ______.
A.
advertising is no different from person-to-person selling in substance
B.
advertising extends sales promotion to a larger area
C.
advertising has greatly improved the production of goods
D.
it is very expansive to advertise a new product
【单选题】Which statement about the amateur is correct?
A.
Professionals and amateurs are very different from each other in science.
B.
The growth of specialization improves the amateur participation in science.
C.
In the twentieth century, due to the increasing developments of science, the difference between the professional and amateur becomes larger than before.
D.
A similar process of differentiation occurred in the specific societies of geology.
【单选题】Which of the following best states the feature of American education that makes it different from education in other countries?
A.
The large number of its schools.
B.
The variety of the courses offered in its schools.
C.
Its special consideration given to immigrants.
D.
Its underlying goal to develop every child's abilities to the fullest extent.
【单选题】传统的武器，它基本的工作原理通常是先点火、发射，然后依靠火药的推力在空中飞行，最后击中()爆炸。不管是枪炮还是导弹这些常规武器，包括很先进的核武器基本上都是这个原理。
A.
碉堡
B.
目标
C.
飞机
D.
武器
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