已知椭圆的两个焦点分别为f1f2

get cracking 为什么会有雨夹雪…… javax.mail.MessagingException:553 authentication is required,smtp2,DNGowLBbuQPU2mFIeZiQBw==.59922S2 1214372564 什么毛病?我程序代码:DataInputStream dis = new DataInputStream(request.getInputStream()) ;String send = dis.readUTF() ;String subje 553 You are not authorized to send mail,authentication is required You are not authorized to send mail,authentication is required是什么意思? I am going hiking in mountains.不是be going to怎么没了,帮我分析一下吧>3 英语翻译还有最后那个at the close是什么词组吗?给讲讲, Are you going on the trip with us?----I'd like to ,but with my exams on Monday,I know I really_______A.wouldn't B.will not C.shouldn't D.shall not 雨夹雪是怎么形成的? 英联邦包括哪些国家当前的英联邦还包括哪些国家 英联邦都包括哪些国家 梦戴维角膜塑形镜好吗?我最近发现我的近视应该去医院治疗一下、去到医院以后测出来左眼散光100度但没有近视 ,右眼近视75度有一点散光 .医院告诉我要配镜,要不就配框架眼睛.还有就是戴 大家觉得treasurer or secretary什么意思啊 原文大致是treasurer or secretary for habitat of humanity 应该是一个社团之类的东西 we shall need a secretary to keep the records of the club,and write and answer challenges.''翻译 三大使役动词是什么?英语 求有关PLC就是Programmable Logic Controller英文文献 最好有中文对照 满意追加100PLC可编程逻辑控制器 英文文献 最好带翻译 跪求高手帮助 万分感谢! PROGRAMMABLE CONTROLLER什么意思 By nine o’clock,all the Olympic torch bearers had reached the top of Mount Qomolangma,（ ）appeareBy nine o’clock,all the Olympic torch bearers had reached the top of Mount Qomolangma,（ ）appeared a rare rainbow soon.A.of whichB.on whichC.fr By nine o'clock,all the Olympic torch bearers had reached the top of MountBy nine o’clock,all the Olympic torch bearers had reached the top of Mount Qomolangma,______appeared a rare rainbow soon.A.of which B.on which C.from which D.above whichB怎 please come ____ Mr Cool's clouthes store.填写介词 帮帮忙吧 怎么把一件事写成一篇通顺字数又够又好的作文? nine o clock in the 填空 2 Call Mr.white -----066-2886 --- more information填上适当单词 1 Make works harder ---- ciass now 2 listen ------ jack .He sings more loudly than jim 用适当单词补全对话 A 26 that B that ‘s sam A； 27 you know him B yes,he’s Mr King 的意思!Mr King 是王先生还是金先生啊? 【一道高一英语单选】Peter,my English teacher,praised me,____even harder in the future.A.encouraging me to studyB.encouraging me studying C.encouraged me studying D.encouraged me to study I will never forget ___ was my English teacher,Peter,who encouraged me what happens.A heB thatC itD this为什么用it,不用he 质量检测考作文没写完字数虽然满了怎么办 会扣几分 语文作文字数够,结尾没写,会扣多少分, 初三一摸考60分作文没写完扣几分 字数够了 without pain.without sacrifice.we would not have hing.是什么意思?大神们帮帮忙 Without sacrifice,without death,we should have nothing翻译成中文是什么意思? This I did at nine o'clock,after which I sat reading the paper.