中国与越南边境线是多少公里

已知在RT△ABC中,∠C=90°,BC=3,AB=5,若把三角形ABC以点C为旋转中心旋转90°,点A旋转到点A'的位置,那么点A与点A'之间的距离AA'_____正三角形ABC经过旋转以后能与正三角形DBC重合,这样的旋转中心共__ she ( ）（ drink）some tea with her friend this afternoon.用括号内正确的形式填空拜托了各位 谢谢she ( ）（ drink）some tea with her friend this afternoon.用括号内正确的形式填空 是填过去时还是将来时 并说 she usually sees her friends.they often drink tea together.前面动词sees 后面drink为什么一个是复数另一个不是? 初二作文《我和母亲(父亲)的几件事》600-700字记叙文望可以真实些,事与事之间的转折要好.(事件和转折不要老土的,新颖一些)送伞,送医院,送牛奶,误会你了的都不要.每个事件可从一些优秀文 A characteristic of American culture that has become almost a tradition is to respect the self-made man - the man who has risen to the top through his own efforts,usually beginning by working with his hands.While the leader in business or industry or 作文,（对妈妈的感激与爱）600字以上的记叙文, vc++中什么时候用assert()?assert()作用等同于哪个函数? 丑小鸭真的是天鹅蛋还是后天养成 天鹅蛋为什么会在鸭窝里不要说编故事的需要 假如丑小鸭不是天鹅蛋,会怎样? 《丑小鸭》中|“只要你是一直天鹅蛋,就算是生在鸭场里也没有什么关系.”这句话给我们的启示. 丑小鸭明明是一只天鹅蛋,为什么作者要这样这样安排材料——丑小鸭是经过努力后才变成“天鹅”的?知道的一定要发答案上来,不管对还是错不追究* traveled和travelled到底哪个对请详细解释一下traveled和travelled,到底哪个是travel的过去是.其中一个是错的,还是2个都对用处不一样?如果2个都对请解释他们的用法. 在七下语文课本中,丑小鸭为什么要拼死飞向天鹅?天鹅蛋怎样才能成为真正的天鹅?只要你是一只天鹅蛋,,有什么关系. 有人认为丑小鸭是天鹅蛋所孵化的,不管努力与否,它都注定是一只天鹅而不是别的东西.你怎样看待这个问题做双面回答!要有道理!好就加30分! 对Your jacket is green中的green提问,人称代词用MY 还是your? her jacket is white (对划线部分提问） 划线white 对is white提问 many people dream about traveling to other_____(行星） 王老师您好,麻烦您也把人教版七年级到九年级的英语课程MP3音频和单词的MP3音频给我发一份. And not a word is left unspoken意思歌词是:(Jonas Brothers (ft.Miley Cyrus))With every strike of lightningComes a memory that lastsAnd not a word is left unspokenAs the thunder starts to crash为什麼"And not a word is left unspoken"这句会译 I'd like to ______some new words. Write some new words is notebook.是什么意事 some are w_______the new words一条线 Why the person who was left is not me中文意思是什么 会哪题做哪题答了一定有好评 西部片英语是western还是western film "影响" 的名词形势,英文怎么说?除了influence,表示长期影响的,impact 是短期的冲击吧,长期影响用impact 合适么,比如with the influence from my father,.....这个influence换成什么好呢, ____ has made our city Dalian was ____ she is today?-__________ has made our city Dalian __________ she is today?-It is the Party’s policy that has made it take on a new look.A.What,that B.That,what C.What,what D.That,that选什么?为什么?是什 I have some words to tell you.words里面的s要去掉吗? January 29th,i have some words to sayi think this is a good way to practice my english.at least this moment these words are conveyed by english.these days i am confused by the law of the society.i don't know why the world i see by myself is so differ some words have been cut out Someone____is reading under the tree may be a good student.A.who B.whom C.that D.which