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因為8/A=B/8 所以,AB=64 所以,A,B成反比例!
2.1:0.7=6:2 2.1:6=0.7:2 2:0.7=6:2.1 2:6=0.7:2.1 0.7:2.1=2:6 0.7:2=2.1:6 6:2.1=2:0.7 6:2=2.1:0.7
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