C-14-Q018mediumsingle_mcqTriangles ABCABCABC and DEFDEFDEF have equal heights hhh, and bases BC=aBC=aBC=a, EF=dEF=dEF=d. Then △ABC:△DEF=?\triangle ABC : \triangle DEF = ?△ABC:△DEF=?aa:da:da:dbd:ad:ad:ach:hh:h