先化简,后求值:a2+b2a2-b2-2aba2-b2,其中a=3,b=2. 发布时间:2017-05-23 22:29 │ 来源:www.tikuol.com 题型:解答题 问题: 先化简,后求值:a2+b2a2-b2-2aba2-b2,其中a=3,b=2.
题型:解答题 All the skirts _____ . They _____ very well. [ ]A. sold out, are sold B. sell out, have soldC. have been sold out, sell D. have sold out, sell 查看答案