读图，完成下列各题。
已知△ABC∽△DEF， S△ABCS△DEF = 94 ，且AD为BC边上的中线，DG为EF边上的中线，则AD：DG=____．
此时单击鼠标会 ( )
find out, feel like, quite a few, bring out, come out, of course, at least, make up, care about, dress up
”形状，如下图所示： 