已知A={x|y=1-2x+2x-1x+2},B={y|y=x2-2x-3,x∈ 发布时间:2017-04-13 17:37 │ 来源:www.tikuol.com 题型:填空题 问题: 已知A={x|y=1-2x+2x-1x+2},B={y|y=x2-2x-3,x∈[0,3)},则用区间表示A∩B=______A∪B=______.
题型:填空题 The boy who was believed _____ in the last exam was being questioned by the teacher when I entered his office. [ ]A. to cheat B. cheating C. to have cheated D. having cheated 查看答案