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最佳答案:The sychronization of generators must meet quasi-synchronizing conditions, and i
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最佳答案:stract:The public crisis is the public public relations crisis,is in the social
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最佳答案:第一行The security 改为 the security 逗号后面字母小写第三行researching 也可改为investigating第三行末,so
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最佳答案:In order to protect the safety of drinking water of the city,NYC started a mega