如图所示,已知射线CB∥OA,∠C=∠OAB=100°,E、F在CB上,且满足∠FOB=∠AOB,OE平分∠COF．（1）求∠EOB的度数；（2）若平行移动AB,那么∠OBC：∠OFC的值是否随之变化?若变化,请找出规律；若不变,求出
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