∠BOC-∠BOD=40° ∠BOC+∠BOD=180
则 ∠BOC=110 ∠BOD=70
则 ∠AOC=180-∠BOC=70
OE平分∠AOC 则 ∠EOC=∠AOC/2=35
ze 则 ∠BOE=∠EOC+∠BOC=35+110=145