如果|x+1|+(y+2)2=0,并且ax-3ay=1,那么a=______. 发布时间:2017-04-07 01:32 │ 来源:www.tikuol.com 题型:填空题 问题: 如果|x+1|+(y+2)2=0,并且ax-3ay=1,那么a=______.
题型:填空题 情景交际。1. 当别人问你“How many books do you have?”时,你可以回答:[ ]A. I have one book. B. I have two book.2. 李明手里拿着几枝钢笔,你想知道他到底有多少枝,你怎样问他?[ ]A. May I have one pen? B. How many pens do you have? 查看答案