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【单选题】
一个中性的刺激与一个原来就能引起某种反应的刺激相结合,而使动物学会对那个中性刺激作出反应,这是( )。A.
经典性条件反射
B.
操作性条件反射
C.
观察学习
D.
试误——联结学习
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举一反三
【单选题】It was not until he arrived in class _____ realized he had forgotten his book.
A.
when he
B.
that he
C.
and he
D.
he
【单选题】Hemingway told his editor Max Perkins that the book was not so much about a generation being lost, but that “the earth abideth forever.” He thought the characters in _____ may have been “battered” but...
A.
Farewell to Arms
B.
The Old Man and the Sea
C.
The Sun Also Rises
D.
The Snow of Kilimanjaro
【单选题】Hemingway told his editor Max Perkins that the book was not so much about a generation being lost as about "the earth abideth forever." He thought the characters in _____ may have been "battered" but ...
A.
Farewell to Arms
B.
The Old Man and the Sea
C.
The Sun Also Rises
D.
The Snow of Kilimanjaro
【简答题】造血组织主要由 和 组成。
【简答题】造血组织由_____组织和______细胞构成
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