vector删除指定元素

若函数y=ax^2-2x+lnx在定义域内单调递增,则实数a的取值范围 We don't know _____.-It is said that he was born in Canada.A.what he is B.where he was born C.where he comes from D.if he lives here 这一题B.C好像都可以用,实在想不通.要详细一点点哦, —We don't know_____.—It is said that he was born in Canada.A.what he isB.when he was bornC.where he comes fromD.if he lives here ———were you born?———are you?I don’t know you ———is your birtgday?选词填空 1、when 2、what 3、who 4、where He doesn't know ____ is _____he was born.A.that, where B.that,whatC.where,that D.what, where选哪个,为什么?若能从语法角度解释清楚,追加悬赏20分,绝不失言! 污水的一级处理,二级处理,三级处理,深度处理各是什么,它们有什么区别? 《泊船瓜洲 》诗的意思在线等待 二级运算放大与一级放大区别?把一个微弱的信号放大600倍,采用一级放大600倍与二级放大10*60倍有什么区别吗 一道数学题…计算的 三级训练数学题12分之1加20分之1加30分之1加42分之1加56分之1加72分之1等于多少? 设F(X)=LG(1+2^x+A.4^X)/3,其中A属于R,如果X属于(-无穷大,1]时,F(X)有意义,求A的取值范围. 函数f（x）＝x＋1的定义域为［1,16］,F（x）＝f（2x）＋f^2（x）＋1,求函数F（x）的值域 Is this house_he was born in?A.the oneB.thatC.which He ______born in Suzhou.是填is还是was 英语单项选择He dosen't know --------is-------he was born.A.that where B.that what C.where that D.what where请问 选什么 说明理由 8.— Does anyone know _____?— I hear that he was born in Sweden.A.what he is B.when he was born这题选择什么呢? we do not know（ ） it is said that he was born in sewdenwhat he isif he lives herewhere he comes fromwhich country is he from理由谢谢了 已知两相交直线的斜率,求其夹角度数的公式求大神帮助 两直线夹角计算公式 两直线夹角公式是怎么推导的?就是这个公式：tanα=|k1-k2/1+k1k2|绝对值 两直线夹角公式已知两条直线方程l1:Ax1+By1+C1=0 l2:Ax2+By2+C=0要求他们的夹角具体怎么求啊? 小女不才,I Was Born To Love You 的意思? 谁有i was born to love you的歌词?! gueen的歌. i was born to be somebody是什么意思 But I was born to love was born to什么意思 一个两层书架,共放书128本,把上层的17本搬到下层,上层的书比下层的还多2本,原来上下两层各放多少本? 已知m属于一切实数R,直线L:mX-(m2+1)Y=4m（注:m2表示m的平方）,则直线L斜率的取值范围是什么, （高二数学）关于“经过两点的直线的斜率公式”的疑问在高二上数学教科书里,推导用两点的坐标表示直线的斜率,在坐标平面内,设直线p1p2的倾斜角是A,斜率是k,向量p1p2的方向是向上的.那么 某工厂计划用两年的时间把成本降低到64%,如果每年降低的百分数相同,求这个百分数 求求求解初二的函数应用题!某童装加工企业今年五月份每位工人平均加工童装150套,最不熟练的工人加工的童装套数为平均套数的60%.为了提高工人的积极性,按规定完成外商订货任务,企业计 A,B两个商场平时以同样价格出售相同的商品,春节期间让利酬宾,A商场所有商品按8折价格出售;在B商场消费金额超过200元后,超出部分可在这家商场按7折价格购物.试问如何选择商场来购物更经