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【单选题】
已知商品X的价格为1.5元，商品Y的价格为1元，如果消费者从这种商品得到最大效用的时候商品Y的边际效用是30，那么商品X的边际效用应该是：（）A.
20
B.
30
C.
45
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【简答题】Last Sunday the Greens went to climb the hill. When they got home, it was very late. Mr. Green opened the front door and they both went into the house. Because it was too late, Mrs. Green turned on th...
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【单选题】When he _________ the door, he found his keys were nowhere.
A.
would open
B.
opened
C.
had opened
D.
was to open
【单选题】______ his eyes when she told him that it was time for them to leave.
A.
Hardly had he opened
B.
Scarcely did he open
C.
No sooner did he open
D.
He had no sooner opened
【单选题】Mario DeLiberty had been living a small businessman's dream. Twenty-one years ago he opened up the Westgate Pub in Havertown, Pennsylvania, after buying a seedy (破烂的) bar — 'a real trash can, everythi...
A.
DeLiberty ran a restaurant successfully but was being threatened by his competitors.
B.
DeLiberty was being sued for denying the handicapped their access to his business.
C.
DeLiberty offered poor services to his handicapped customers.
D.
There were some quality problems for the facilities in DeLiberty's pub.
【简答题】医患之间要建立亲密的关系,全科医生应能________即能从患者的观点来看他们的问题。
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