题目应为：BD、CD分别平分∠ABC、∠ACB,
EF过D,且EF∥BC,对吗?
EF=BE+CF.
证明：∵BD平分∠ABC,∴∠EBD=∠CBD,
∵EF∥BC,∴∠EDB=∠CBD,
∴∠EBD=∠EDB,
∴BE=DE,
同理：CF=DF,
∴EF=BE+CF.