求两道比的应用题1.AB两地相距360米,甲乙分别从AB两地相对开出,4小时相遇,已知速度比为4:5,2.两块同样质量的铜锌合金,第一块中铜:锌=2:5 .第二块铜:锌=1:3现将两块合金合成一块,求新合
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![求两道比的应用题1.AB两地相距360米,甲乙分别从AB两地相对开出,4小时相遇,已知速度比为4:5,2.两块同样质量的铜锌合金,第一块中铜:锌=2:5 .第二块铜:锌=1:3现将两块合金合成一块,求新合](/uploads/image/z/11956770-18-0.jpg?t=%E6%B1%82%E4%B8%A4%E9%81%93%E6%AF%94%E7%9A%84%E5%BA%94%E7%94%A8%E9%A2%981.AB%E4%B8%A4%E5%9C%B0%E7%9B%B8%E8%B7%9D360%E7%B1%B3%2C%E7%94%B2%E4%B9%99%E5%88%86%E5%88%AB%E4%BB%8EAB%E4%B8%A4%E5%9C%B0%E7%9B%B8%E5%AF%B9%E5%BC%80%E5%87%BA%2C4%E5%B0%8F%E6%97%B6%E7%9B%B8%E9%81%87%2C%E5%B7%B2%E7%9F%A5%E9%80%9F%E5%BA%A6%E6%AF%94%E4%B8%BA4%EF%BC%9A5%2C2.%E4%B8%A4%E5%9D%97%E5%90%8C%E6%A0%B7%E8%B4%A8%E9%87%8F%E7%9A%84%E9%93%9C%E9%94%8C%E5%90%88%E9%87%91%2C%E7%AC%AC%E4%B8%80%E5%9D%97%E4%B8%AD%E9%93%9C%EF%BC%9A%E9%94%8C%3D2%EF%BC%9A5+.%E7%AC%AC%E4%BA%8C%E5%9D%97%E9%93%9C%EF%BC%9A%E9%94%8C%3D1%EF%BC%9A3%E7%8E%B0%E5%B0%86%E4%B8%A4%E5%9D%97%E5%90%88%E9%87%91%E5%90%88%E6%88%90%E4%B8%80%E5%9D%97%2C%E6%B1%82%E6%96%B0%E5%90%88)
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