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在短期均衡时所达到的平均成本处于最低点，这时资源自由流动，生产要素的效率得到了最有效的发挥
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现实中完全竞争的情况很少，一般来说，竞争必然引起垄断。
词汇题1单选题Part IIVocabulary & Structure (10 minutes)Directions: This part is to test your ability to construct correct and meaningful sentences. It consists of 2 sections.Section ADirections: In this section, there are 10 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked A), B), C) and D). Then you should mark the corresponding letter on theAnswer Sheetwith a single line through the center.25. We regard customer complaints as an opportunity to _____ our service.A) bring B) receive C) improve D) obtain
26. We took advantage of its sports facilities _____ staying at the hotel.A) although B) while C) until D) unless
27. It has been decided that Mr. Li will _____the company when the CEO retires.A) put off B) call for C) bring about D) take over
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