看完诗词大会的读后感

已知3、a、4、b、5这五个数据,其中a、b是方程x^2-3x+2=0的两个根,则这五个数据的标准差是___根号2____什莫叫标准差?初三好像没学过! 1几知定点A(4,2),O是坐标原点,则线段OA的垂直平分线方程是__;2.己知实数x,y满足x+y大于或等于2;,x-y小于或等于2;0小于或等于y小于或等于3;则z=2x-y的最大值是__; 语法题目请解释分析谢谢为什么不选Cby the time the course ends ( )a lot about culture.A.we'll learnt B.we r leaving C.we have learnt D.we'll have learnt 语法题目请解释分析谢谢为什么不选Ayour mother ( ) for u everywhere.where have u been?A.had looked B.has been looking C.looked D.was looking 语法题目请解释分析谢谢为什么不选BMr.Wilson asked me if these islands ( ) Italy.A.have been belonged to B.r belong to C.belong to D.belonged to 中国上下五千年和世界上下五千年各10篇50字的读后感 《世界上下五千年》读后感 how were the assistants in the store?_____friendly 1.they ere 2.they were 3.they did 4.they do 高一梦游天姥妗留别,古诗为焦仲卿妻作得两片翻译以及文章的中心思想所表达作者的情感! 注：人教版的 语文文言文中,怎样辨别而,之的意义 高一下语文古文哪篇比较重要人教版的 朝花夕拾读后感1000 寻找朝花夕拾读后感1000 You ( ) so much;you r wasting your money.A.ought to not smoke B.oughtn't smokeC.oughtn't to smokeD.oughtn't smoking 在小于100的自然数中,能被3或7整除的数共有多少个? 口字旁加个宏是什么字 新概念英语第三册35课的问题有1句：Those who seek it undertake an arduous journey and can never be sure that they will find it.为什么SURE后面用THAT不是WHETHER? 5篇读后感400字也可以推荐一下读什么书,因为我会写不会读书,最好都要!我会额外加分的 请教新概念三册 第33课 语法问题最后一句话 .for they greedily devoured what left of the cake (它们贪婪的吃掉了剩下的蛋糕).这句话的语法不太懂啊 what 在句子中表示什么意思?做什么成分啊? 类似的句 新概念英语3册3课语法问题有一句话是：其中有一尊雕像,她的躯体是在公元前15世纪的历史文物中发现的,而她那身首异处的脑袋却碰巧是在公元前5世纪的文物中找到的.The body of one statue was fo 上面羽字下面白字怎么读 八年级物理周刊第八期2011-2012第二章光现象单元测试卷 He decides to work ______than last year.（请说明理由,A.more hardB.much hardC.much harderD.a little hardE.more harder work harder in school this year .这里的work harder是比较级吗》 新概念第三册第三十六课语法分析后半部分：After having been wounded towards the end of the war,he had been sent to hospital and was separated from his unit.The hospital had been bombed and Hans had made his way back into Western Ger He decides to work ____ than last year.A.haedlier B.more hardly C.much harder D.a little hard lim(x^n-1)/(x-1)(x趋向于1n为正整数)的极限 从句的谓语动词的时态一致还是要往后推一个时态 组词：见.现.车.轮.其.期.弟.第. he runs ____(fast)this year than he did last year.如果填faster 原因是什么? 求答案,高一英语单选