配平

（1）____ Fe₃O₄+____ CO____ Fe+____ CO₂．

（2）____ C₂H₄+____ O₂____ CO₂+____ H₂O．

    Hello! I'm Linda. I have a good e-friend. Her name is Zhang Yun. Her English name is Betty. She is a Chinese girl, but she lives in the UK with her parents. Her father is a doctor and her mother is a teacher. She is ten years old. She call me big sister. She is good at English. She likes Chinese and I also like Chinese. She likes singing and playing basketball. This is my good e-friend. Do you want to know more?

全集$U=R,$$A=\left\{x|\left|x-1\right|>2\right\},B=\left\{x|x^2-6x+8<0\right\}$则$\left(C_{U}A\right)\cap B=$（   ）