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【单选题】
已知商品X的价格为8元，商品Y的价格为3元。若消费者购买5个单位X和3个单位Y，此时X和Y的边际效用分别为20和14，那么为获得效用最大化，该消费者应该( )。(中山大学2006、2009研)A.
停止购买两种商品
B.
增加X的购买，减少Y的购买
C.
增加Y的购买，减少X的购买
D.
同时增加对两种商品的购买
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举一反三
【简答题】在Word中给文档加口令后,若忘记密码,则该文档_______打开,其口令无法删除。
【单选题】听力原文：W: What are you doing here? M: I'm preparing my fishing tools. W: What for? M: I'm going to fish with some of my friends. W: Are you fond of fishing? M: Yes. I like fishing after school and on Su...
A.
He is fishing.
B.
He is preparing for fishing.
C.
He is taking photos.
【单选题】I’m really a bit worried because I have no idea what my parents’ _________ will be to my poor examination result．
A.
expression
B.
reaction
C.
appearance
D.
expectation
【单选题】听力原文：W: What a beautiful car. M: My father bought it for me on my birthday. What can't we learn from the conversation?
A.
The boy has a car.
B.
His father bought the car for him.
C.
He doesn't like the car.
【单选题】what infuriated my mother most (par. 1 1)
A.
angered
B.
humiliated
C.
made laugh
D.
typified
【单选题】听力原文：W: What are you doing? M: I'm looking for my glasses. Q: What's the man looking for? (18)
A.
His glasses.
B.
His cat.
C.
His books.
【单选题】听力原文：W: What ages are your children? M: My first son is 24 and my second son is 20. My daughter is over 15. W: What about your wife and you? M: My wife is 46 and I'm twice my first son's age. How old ...
A.
50.
B.
48.
C.
46.
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