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【单选题】
当总效用以递减的速率增加时,边际效用应该是( )
A.
为正值，且不断增加
B.
为负值，但不断减少
C.
为正值，且不断减少
D.
为负值，但不断增加
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参考答案：
举一反三
【单选题】一个有4条边的树图,顶点的个数是( )。
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【简答题】He is quiet and shy. He likes to hide his eyes behind his hair. He doesn't smile very often. However,if you talk to him about music,he'll have a lot to say. This is Jay Chou,the 24-year-old Taiwanese ...
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【单选题】一个有8条边的树图,顶点的个数是( )。
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9
B.
7
C.
6
D.
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【单选题】一个有6条边的树图,顶点的个数是( )。
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8
B.
7
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6
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5
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【单选题】一个有6个顶点的树图,边的个数是( )。
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8
B.
7
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6
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5
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【单选题】一个有7条边的树图,顶点的个数是( )。
A.
8
B.
7
C.
6
D.
5
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【简答题】Talia: Tony, could we stop reporting on Nick? It's his life miserable.Tony: If he (1) ______ become a soccer superstar, then no one would care. Do you think we should stop reporting the news?Ta...
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【简答题】He is quiet and shy. He likes to hide his eyes behind his hair. He doesn’t smile very often. However, if you talk to him about music, he’ll have a lot to say. This is Jay Chou, the 29-year-old pop kin...
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【简答题】He is quiet and shy. He likes to hide his eyes behind his hair. He doesn't smile very often. However, if you talk to him about music, he'll have a lot to say. This is Jay Chou, the 24-year-old Taiwane...
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【判断题】I thought about those small bits of self confidence that were so painstakingly built in boyhood, and how they were being crushed at the counter. I thought about how a boy could be so shy and felt so m...
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