题目

阅读理解 Recently, a junior highschool sent several students back home because they broke the school uniform (校服) rules. Should students wear school uniforms? The Young Worldmagazine held a discussion on this topic (话题) . Kennedy: The school uniform is veryimportant, because it always reminds me that I am supposed to go out of my wayto study hard. It also helps prevent school bullying (欺凌) .If everyone wears the same clothes, it is impossible to laughat other people's clothing. Manson: The uniform has to beearned (获得) through efforts. Studentsshould start school with no uni12．已知全集U={1，2，3，4，5，6，7，8}，A={x|x2-3x+2=0}，B={x|1≤x≤5，x∈Z}，C={x|2＜x＜9，x∈Z}．（以下请用列举法表示）（1）求A集合与B集合（2）求A∪（B∩C）（3）求（∁UB）∪（∁UC）．