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防汛抗旱知识500问（一）
2026-03-23
网络整理
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Key Point:第一部分 治水典故、历史重大水旱灾害、水文化传承等一、单选题1.黄河历史上经常改道泛滥，造成灾害。一般认为，有史料记载的黄河第一次大改道发生在（ ）。A.公元前二十一世纪 B
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