初三化学上册

△ABC中,BC=7,AC=3,∠A=120°,求以点B、C为焦点且过点A的椭圆方程． 写出适合下列条件的椭圆的标准方程：a=4,bc=3√7,且b 已知 椭圆的2个交点是(3,0)(-3,0)且过点(7,8)求椭圆得标准方程 I hope you______ the instructions ready before I come tomorrowA.to get B.shall get C.will get D.will have gotten 选哪个 1. I hope you______ the instructions ready before I xome tomrrw 2.Not a lways______they wantto 31A,to get B.shall fet C.will get D.will have goffen2A.beople can do what B.people cannot do what C.can people do what D.can t people do whet 求下列各数中的x 1、2^5×128=2^4x 2、3^3x+1=27×81急 -2 27 128 349 ()求括号里的数字 The team was counting on Joe__the raceA.won B.win C.wins D.to win the team was counting on Joe to win the race 怎么判断一个方程是否表示椭圆 椭圆方程中的a和b表示的什么?最好能画出图,在图中表示出a和b的位置 1 要怎么样才会真正的放开?为什么我放不开? 急,会计题求助～下列各项中可以引起所有者权益减少的有?下列各项中可以引起所有者权益减少的有A以低于成本价销售产品B用盈余公积弥补亏损C宣告分配利润D宣布发放股票股利 多选!还有 英语翻译STEEL BAR SS400怎么翻译,急用! 1.乳酸菌有有氧呼吸的形态么?它有氧呼吸时是产生水和二氧化碳吧?2.酵母菌与乳酸菌在结构上的不同.3.酵母菌与细菌在结构上的不同. THE MILL ON THE FLOSS PENGUIN CLASSICS怎么样 为何会引起所有者权益减少? 什么是VB KCG khes gqx wq ,q e vb ny nge wg im e THE MILL ON THE FLOSS OXFORD WORLDS CLASSICS怎么样 vfb vb kc wq kr udh kb . I told her that he hoped that they could go together again.这句话有2个从句解释一下结构谢谢! the tisishs hoped that by the time theymoved in august,marc would grow more accustomed to the idea of leaving怎么翻译? British Broadcasting Corporation简称（bbc）是什么意思呢? 英语翻译little和a little修饰不可数名词,few和a few修饰可数名词,那为什么这里用了few,people 不是不可数名词么? 08年看流星女友最近非得要看流星 跟我说不管有没有都让我带她去所以 我家在北京市朝阳区 请问本区内有没有比较辽阔的场地 好让我陪女友看流星呢（如果女友满意 我愿意追加分数） when he stopped in a village further on中的further 那整句该怎么翻译？ 英语翻译when he stopped at a village later on,he was told that a queen bee must be hidden in his car as there were thousands of bees nearby. When he____at a village,是填reached 还是 went on没有arrived的选项 ktr 什么意思 ktr是什么意思