若(3x+4y)2=(3x﹣4y)2+B,则B=( ). 发布时间:2017-05-15 17:58 │ 来源:www.tikuol.com 题型:填空题 问题: 若(3x+4y)2=(3x﹣4y)2+B,则B=( ).
题型:填空题 Only after Mary read her composition the second time ____ the spelling mistake.A.did she noticeB.she noticedC.does she noticeD.she has noticed 查看答案