已知:(a-b)2=9;(a+b)2=25,则a2+b2=______. 发布时间:2017-05-14 22:06 │ 来源:www.tikuol.com 题型:填空题 问题: 已知:(a-b)2=9;(a+b)2=25,则a2+b2=______.
题型:填空题 What time ______ you _____ home last Friday?A. did; get to B. did; get C. do; reached D. are; getting 查看答案