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罗马仕宣布召回超 49 万台充电宝，极端场景下可能有燃烧风险，有多危险？为何有安全隐患的产品能够上市？
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rust中的pin是不是一个失败的设计?
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当年你们班第一名和最后一名的人都在干吗？
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做客孩子临走时带走几只玩具，我的孩子抗拒并一直哭，要怎么开导？
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count(*) count(1)哪个更快？
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