问题
选择题
下列各组线段,能成比例线段的是( ) A.3cm,6cm,7cm,9cm B.2cm,5cm,0.6dm,8cm C.3cm,9cm,1.8dm,6cm D.1cm,2cm,3cm,4cm |
答案
答案:C
下列各组线段,能成比例线段的是( ) A.3cm,6cm,7cm,9cm B.2cm,5cm,0.6dm,8cm C.3cm,9cm,1.8dm,6cm D.1cm,2cm,3cm,4cm |
答案:C