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【单选题】
“有些学生努力学习以避免考试不及格”这种行为符合( )A.
正强化原则
B.
负强化原则
C.
惩罚原则
D.
强化消退原则
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【简答题】恒温烘箱是测定蛋白质的主要设备。
【简答题】阅读理解。 Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few obvious benefits? Why should resources be spent on space rather than ...
【简答题】Should staff that performs well at work be rewarded? (Why? / Why not? )
【简答题】阅读理解 Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few apparent benefits? Why should resources be spent on space rather than ...
【简答题】阅读理解。 Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few apparent benefits? Why should resources be spent on space rather than...
【简答题】阅读理解。 Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few apparent benefits? Why should resources be spent on space rather than...
【单选题】#00330038003000301585065697105请问“男”更适合放在哪个变量中？
A.
a
B.
address
C.
sex
D.
num
【单选题】请问“男”更适合放在哪个变量中？
A.
address
B.
num
C.
a
D.
sex
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