C-14-Q023mediumsingle_mcqIn △ABC\triangle ABC△ABC, DE∥BCDE \parallel BCDE∥BC with DDD on ABABAB and EEE on ACACAC. Then —aAD:DB=AE:ECAD:DB = AE:ECAD:DB=AE:ECbAD:AB=AE:ACAD:AB = AE:AC only