效率效率,Go,go,go,go......
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![效率效率,Go,go,go,go......](/uploads/image/z/1060045-61-5.jpg?t=%E6%95%88%E7%8E%87%E6%95%88%E7%8E%87%EF%BC%8CGo%2Cgo%2Cgo%2Cgo......)
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效率效率,Go,go,go,go......
效率效率,Go,go,go,go......
效率效率,Go,go,go,go......
5题,2,3能组成比例,6题,小红说的对,54:45=6/5=72:60,8题,第一问设实际长度为x,24.92:x=1:24,x=598.08,第二问,设模型长度为x,x:11.76=1:24,x=0.49