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【简答题】
在一个完全竞争性行业里，某企业的成本函数为 TC＝Q3－8Q2＋30Q＋50 试寻找该企业盈亏平衡点和关门点的产量和相应的市场价格，并求出该企业的短期供给函数是什么?
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举一反三
【多选题】Listen to dialogue 1 about credit card and choose the best answer to each of the questions you will hear. 1. Why was one man stopped at the lobby of the hotel by the hotel staff? 2. Why is having a c...
A.
此选择无题
B.
此答案无题选择
C.
第三题Everybody is insured against everybody else.
D.
第一题Because he did not have a credit card number. 第二题Because you can use it to prove you are a trustworthy person.
【单选题】听力原文：M: It's hard to believe John has already finished his homework. W: Well, he copied Jack's homework and made a few changes. Q: What does the woman say about John? (17)
A.
John is a fast worker.
B.
John did Jack' s homework.
C.
John has not finished his homework.
D.
John didn't do the homework on his own.
【简答题】(Follow) ______ his brother, John became an engineer after he finished college.
【简答题】After he finished his duties on the farm, John often occupies himself by fishing.
【简答题】John Smith was lazy. He had finished his education and was happy to sit in his room and listen to the radio all day long. In fact, he had been doing nothing for almost six months, which worried his fa...
【单选题】John received an invitation to dinner, and with his work ____, he gladly accepted it. [ ]
A.
finished
B.
finishing
C.
having finished
D.
was finished
【单选题】--- Has John finished writing his compostion?--- No, and it______ two hours ago.
A.
should be finished
B.
should have finished
C.
should finish
D.
should have been finished
【单选题】“Has John finished writing his composition?” “No, and it ____two hours ago.”
A.
should be finished
B.
should have finished
C.
should finished
D.
should have been finished
【单选题】Listen to the passage on Credit Cards and choose the best answer to each of the questions you will hear. 1. In what way does a bank credit card differ from a store credit account? 2. Where can you use...
A.
1. The holder is not restricted to making pruchases in one place.
B.
4. B 7. B 8. B
C.
2. C 3. C
D.
5. D 6. D
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