椭圆,e为离心率,p为一动点,PF1F2为直角三角形有几个,0<e<1

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椭圆,e为离心率,p为一动点,PF1F2为直角三角形有几个,0<e<1
This is a black backpack改为同义句 关于After school的作文 We will perform ballet at the party tomorrow.变否定句:变疑问句:肯定回答:否定回答:They will buy (a new car)next year?(对括号提问)()()they () next year?I will stay in China (for two days)?对括号提问()() 我练习英语口语的发音,练习音标的时候嘴巴老是漏风,比如s这个音,老是漏风说的很浑浊,该怎么克服啊? Mrs Smith,who comes from___ European country,has formed the habit of attending church on SundaysMrs Smith,who comes from___ European country,has formed the habit of attending ____church on Sundays.A.an 不填; B.an; the C a; the D a; 不填 He is short and thin.还是He has short and thin.哪个对哪个错 一个草字头,底下一个仕,念什么啊 厘米cm的英语口语怎么说?用音标写出来. she is thin and small 还是 she is thin and short什么情况下用small ,什么情况下用short? 上面一个草字头下面一个仕途的仕 是什么字啊 Lily's sister is ___short_and_thin___(划线部分提问)______does Lily's sister ______ like? 德语填写动词1.Ergänzen Sie das Verb.1) Wann der Deutschunterricht?Um 8 Uhr der Deutschunterricht.2) Wie der Lehrer den Text?Er den Text durch Beispiele.3) Was ihr im Unterricht?Wir im Unterricht ein Diktat.4) Wie Zhang Ming den Text?Er den The mutton comes from the ___ The ______comes frotheflour.The paper comes from the ____ The boy comes from the country and he speak in a broad accent 的中文意思 步步高H8s和诺亚舟U18哪个好 草字头怎么读 求一片写事的文章, 谁能告诉我怎样能使一片文章用最快的速度传出去啊? “带有雪字的七言诗” 第三个字是你的七言诗 步步高H9与读书郎G50比,哪个更实用 快易典h8好,还是步步高h8好? Tom's father,as well as his mother,__in New York for a few more days.A.suggest him to stay B.suggested him that he should stay C.suggest him staying D.suggests he stay D,为什么不是B?求详解 短文填空, 短文填空 he is on his way to becoming a doctor为什么become用现在分词? 一个草字头 下边一个忘 念什么?左边一个口 右边一个不 念什么 杨利伟去太空里面穿的是什么做的内衣? 一个草字头 下面一格仕 念什么拼音哦 初二英语作文.给采纳,快一点急用 现在美式英语和英式英语哪个在世界上通用?并且在商业领域和公共场合...现在美式英语和英式英语哪个在世界上通用?并且在商业领域和公共场合应用的最为广泛? This is the way that he did things中that作什么成分啊?这是什么语法用法?