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Artificial refrigeration involves all of the following processes EXCEPT
2011-09-14
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What can be inferred from paragraph 1 about cold storage before the invention of artificia
2011-09-14
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The word perishable in paragraph 1 is closest in meaning to
2011-09-14
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根据以下材料，回答题：What is the main reason that people developed methods of refrigeration?
2011-09-14
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