参数方程的法向量

机械基础题在轴上切制螺纹时,轴应留有.,磨削阶梯轴时,轴肩等处应留有砂轮的. 谁有CAD基础练习题 机械方面的·~ 求做一个一元二次方程,使它的两个根是方程2x^2-3x-1=0的各个根的2倍 1.W:May I help you?M:Yes.Is that Mr.Johnson speaking?W:I'm sorry.Mr.Johnson is not in now.Would you call later again or would you like to leave a message?M:( )W:Certainly.( )M:Yes.My name is George Green.My telephone numberis247-2239.W:OK.( )M:Thank 1.Did you interview him yesterday = Did you ___ ___ ___ ___ him yesterday 2.I didn't see so tal a tree.= I didn't see ____ a _____tree. 【1】 _____ Dasan is from Canada ,_____he can speak Chinese very well.A.Although,but B.Although,/ C.Although,so D./,so【2】Let us talk about the difference ______Chinese and English names.A.on B.of C.between D.with (1).There's something wrong with my bike.(对something提问） (2).I don't know when and how I should leave for Nanjing.(该简单句）还有一道There is plenly of rain in the south of China.(反意疑问句） The little girl ____ (look) very nice. The little girl is very pretty.改为感叹句——the little girl is!——pretty little girl she is! () very confused,the little girl looked ((语法好的进,我想知道这个.做下此题,very confused,the little girl looked up the information in the book to find out the answerA Being feel B feltC feelingD to feel这个题考的是什么语法, The little girl writes very carefully.（改为感叹句） ______ ________ the little girl writes! 初中定语从句辨析在定语从句中,whom与who什么时候可以相互转化,什么时候不能相互转化.还有如何判定关系词在从句中作主语、宾语、定语或其他成分.求详解. 高中英语必修三, 已知关于x的方程mx+2=2（m-x）的解 高中英语必修一 高中英语必修一如何教 有几道英语题问, 几道英语题（希望大家给家指点指点）1 What is that in English? ______.A:lt is egg B:That is eggC:It is a egg D:It is an egg2 _______is this pen? It is Wang Fang'sA:Who's 希望你这句话是对我说的 ,这句话用英文怎么说如题 已知△ABC和点M,对空间内的任意一点O满足,向量OM=1/3(向量OA+向量OB+向量OC),若向量AB+向量AC=m向量AM则m等于多少.我已经会做一大半了.设AB中点为G.我会做到是2/3向量OG加1/3向量OC=OM了/然后怎么OM 设O为△ABC的外心,点M满足向量OA+向量OB+向量OC=向量OM,则M是△ABC的 定语从句的练习题 带讲解的 五年级英语作业本 英语翻译人教版PEP六年级下册APPENDIX1的 翻译 The theater group performed a three-act play. 英语翻译：他们乘索道过河.They cross the river____ ______. 将下列方程化为一元二次方程的一般形式,并分别指出它们的二次项系数,一次项系数和常数项 (3x－2)将下列方程化为一元二次方程的一般形式,并分别指出它们的二次项系数,一次项系数和常数 @##￥%……&*（）——+|+——）（（*&……%%￥￥#：“}{”? The most common way latchkey children deal with their fears is by hiding.It might be in a shower stall,under a bed,or in a closet.The second is TV.They'll often play it at high volume.It's hard to get statistics (情况) on latchkey children,the long Complete the sentences with the words and phrases in the box.[kiss noses say goodbye shake hands smile three times ]In China,people (1)____with each other and(2)____.In America,they hug.Two friends hug each other when they meet or(3)____,and mothers 知道比重,如何去配该溶液?如：配硝酸比重为1.07的硝酸. 六年级上册英语活动手册14页和15页的答案最好快点,我急需!QQ：1070076213