中国古代气候与朝代

函数y=sin^2x+2cosx,在[π/3,2π/3]的最小值 求 y=sin^2x-2cosx的最大最小值 日省吾身, 谁知道炯炯有神的近义词啊?急 余弦函数y=cos2x的定义域为?已知2cosx-1=m ,则m的取值范围是?使得y=5cos(2x-π/3)取得最大值的X值是? 已知 -1/m>1 求m的取值范围? 小明急得火冒三丈. 能帮我解答一下初二的数学题吗? 综合英语的单选题,求大侠建议11.Joe first heard of the man referred to as a distinguished artist.11.____ Joe first heard of the man referred to as a distinguished artist.A.It was Steven thatB.It was Steven whoC.It was from Steven thatD.Tha 炯炯有神等词的问题,着急!炯炯有神 诲人不倦 迫不及待 学而不厌 见贤思齐 川流不息 逝者如斯 看到这些词你想到了谁?写出有关人物的语言或能赞颂他的名人名言, 例：炯炯有神内似的词语 照样子写词语炯炯有神【 】、【 】、【 】 描写冬天的作文,大神,解答一下 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