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【单选题】
个人从事有目的的活动时，由于遇到障碍和干扰，需要不能得到满足时的一种消极的情绪状态称为
A.
期望
B.
挫折
C.
公平
D.
强化
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参考解析：
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B.
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C.
the author has a car that can think for itself
D.
some computers now can already make loud complaints
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A.
0.3
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【单选题】Families packed into their cars and drove across the country to ______ the new frontier.
A.
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search
C.
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D.
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A.
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B.
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【单选题】Families packed into their cars and drove across the country to ______ the new frontier.
A.
investigate
B.
search
C.
explore
D.
inspect
查看完整题目与答案