A/14=B/16=C/18=D/20,那么A:B=( ):( ),C:B=( ):( ),D:B=( ):( )快!谢谢!

问题描述:

A/14=B/16=C/18=D/20,那么A:B=( ):( ),C:B=( ):( ),D:B=( ):( )
快!谢谢!