已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c

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已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:ca:b=1/2

已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c
已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c

已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c
a:b=1/2:2/5=5:4=15:12
b:c=1.2:0.5=12:5
a:b:c=15:12:5