A是B的2/5,A:B=():();A比B多2/5=():()

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A是B的2/5,A:B=():();A比B多2/5=():()
A是B的2/5,A:B=():();A比B多2/5=():()

A是B的2/5,A:B=():();A比B多2/5=():()
2:5 7:5