已知a+b=4,ab=1,则a2+b2的值是______. 发布时间:2017-05-15 00:39 │ 来源:www.tikuol.com 题型:填空题 问题: 已知a+b=4,ab=1,则a2+b2的值是______.
题型:填空题 —__________ is it to your home town from here?— Well, it takes a little over three hours to get there by coach.A.How soonB.How muchC.How longD.How far 查看答案