题目内容
在长期内，可以调整全部的生产要素。
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当平均成本递增时，边际成本也是递增的。
短期内企业可以调整生产规模。
最佳选择对应的机会成本最小。
[音频]At present, there are 16 (1)______ vocational schools in China, with millions of graduates every year. Generally speaking, they can be categorised into two (2)______ : middle vocational schools which are on the same level as high schools in China, and advanced professional schools offering knowledge and (3)______at a higher level. The average employment after graduation from such schools is even (4)______than that of people with bachelor degrees.
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