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在长期均衡点,完全竞争市场中每个厂商的利润都为零。因此,在价格下降时,行业中的所有厂商都无法继续运营。()
此题为判断题(对,错)。
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His work has ___ his health. The doctor suggests that he travel to the beach to have a holiday.
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She had to __________ several times a night when her baby was ill.
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