民下面一个日

设向量b能由向量组a1,…am线性表示,但不能由Ⅰ:a1,…am-1向量组线性表示,记向量组Ⅱ:a1,…,am-1,b.证明向量am不能由向量组Ⅰ线性表示但能由向量组Ⅱ线性表示 怎样才能认识外国的网友呢?我想练习外语 直线y=kx+b与y+3x交与A(m,6）且y=kx+b经过B(3,7)求k,b 直线m：y=3x-1与直线n：y=kx垂直,则k=___；若直线a垂直于直线m,且过点（0,1）,则直线a的解析式为 两条直线y=-3x与y=kx+b相交于p（-1,m）则关于x y的二元一次方程组y=-3x y=kx+b 如何找国外的网友? 寻找国外网友的有效途径如题 怎么寻找外国网友 怎么交外国网友?我想交一个外国的网友练英语,怎么能交到啊?上哪交?我是真诚发问的. 1000=a+b+100+200a b各是多少 能解不 1000里面有几个100 广东省立中山图书馆一般在哪个阅览室写作业啊 描写罗敷采桑工具美的句子是:从众人反应侧面烘托罗敷美丽的句子： 外国网友发的英文信手工翻中ok,honey))need me frankly?))you even cannot imagine how i am happy to see this words))))))Do you think i have faithfulness with you?my flower))))Waiting for evening to speak with you,you make me more brave))is i 外国网友发的英文信手工翻中4You are smart,beautiful princess for me,you know,baby,that's why I chosen you and so like you...I like alone girl,smart,beautiful,like a princess...many girls which are arounf me only think about my money or be 外国网友发的英文信手工翻中5Today had my mother's birthday,on the next will go to her and make a present...I like to make presents for people,don't know why...How you spent this day?maybe any sport or something interesting?wish you have a 外国网友发的英文信手工翻中3I really don't very like,when see many boy's comments on your profile,I htink they harass you...they only think about your beauty and body...they look in your sexy photos and loose control...maybe some of your 网友发的英文信,手工翻1very busy now,no time to write a letter,but I will...have a nice day...opened your profile saw comment from other boy...hot words,my mood become crazy after that...want to see your new pics maybe,but can't...so,have a 当x>0时,函数f(x)=(a2-1)x (2和x是指数) 的值总大于1,则实数a的取值范围是?我只知道正确答案是 绝对值a大于根号二 若直线y等于kx加b平行于直线y等于3x加2且在y轴上的交点坐 求x的取值范围 1+x/1-x（1/9≤x≤1/2）的取值范围怎么求? 若直线y=kx+b平行于直线y=3x+4,且过点（1,-2）,则b=------. 省部级表彰是什么意思 怎莫用正方体说明8减1等于10? 省级青年文明号是什么意思 ＜＜放水＞＞阅读题答案放 水贵州的朋友在我的纠缠下,终于勉为其难答应带我去参观号称"中国第一"的黄果树大瀑布.结果,我"到了黄河心就死"：黄果树大瀑布的水流量,竟然比我在女生宿舍 放水阅读题答案 放水 阅读理解放水　　1.贵州的朋友在我的纠缠下,终于勉为其难答应带我去参观号称“中国第一”的黄果树大瀑布.　　2.结果,我“到了黄河心就死”：黄果树大瀑布的水流量,竟然比我在女 我想了解一下各个省的区域划分,省级市, 用方位词介绍教室要一段话 方位词是什么