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如圖所示,在平面直角坐標系中,拋物線 經(jīng)過A(-1,0),B(3,0)C(0,3),三點,其頂點為D,連接BD,點P是線段BD上一個動點(不與B、D重合),過點P作Y軸的垂線,垂足為E,連接BE. (1)求拋物線的解析式,并寫出頂點D的
2019-07-24
熱點推薦: 英語詞匯篇章式記憶匯總(20篇文章稿定)
2019-07-24
語言基礎(chǔ)知識、語言基本能力和解題技巧等方面提出一些英語備考的策略與建議: 1.依托課本的單元話題記憶詞匯。詞匯的復(fù)習(xí)以話題為切入點,這樣能較容易地勾起同學(xué)們對相關(guān)詞匯的回憶?砂褑卧~放在句子中記憶,關(guān)注
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2019-07-24
上海世博會對中國的影響 As we all know that 2010 World Expo will be held in Shanghai , this is the first time that China hosted the World Expo. The World Expo has a long history but it has never been
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Greenland is the largest island in the world. It is in the 1 of Europe. Near Greenland is another island. It is small. Its 2 is Iceland. Do you think that Greenland is green and warm? Do you think th
2019-07-24
2019-07-24
熱點推薦: 英語詞匯篇章式記憶匯總(20篇文章稿定)
2019-07-24
根據(jù)中文大意和英文提示詞語,寫出意思連貫、符合邏輯、不少于60詞的短文.所給英文提示詞語供選用.請不要寫出你的校名和姓名. 世界上已有許多國家發(fā)現(xiàn)了新型H1N1流感病毒(H1N1 flu virus)病例.據(jù)了解,人感染該病毒
2019-07-24
Have you ever asked yourself why children go to school? You will probably __1__ they go to learn languages, geography, history, science and all __2__ subjects. That is quite __3__, but __4__ do they
2019-07-24
熱點推薦: 英語詞匯篇章式記憶匯總(20篇文章稿定)
2019-07-24
There was once a millionaire who loved money than anything else in the world. He didn t know exactly how much he had, so he took on a little girl to __1__ all his money for him. It __2__ the little g
2019-07-24
The earthquake in Yushu An earthquake happened on April 14th in the Yushu county of Qinghai province. There are many people died in this earthquake. When we heard the news, we were all shocked and sa
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Do you know how to study __1__ and make your study more effective ( 有效的)? We all know that Chinese students usually study very hard for long __2__, This is very good ,but it doesn t__3__a lot ,for
2019-07-24
節(jié)約水是我們每個人的責(zé)任 As we know, water is very important to man, we can t live without water. The amount of water which is suitable to drink is less and less. But some people don t care about it.
2019-07-24
有關(guān)限塑令問題 根據(jù)國務(wù)院發(fā)布的 限塑令 ,自2008年6月1日起,在所有超市、商場實行塑料購物袋有償使用制度,超市、商場一律不得免費提供塑料購物袋。請你寫一篇英語短文,要求包括以下內(nèi)容: 現(xiàn)狀:目前中國每天
2019-07-24
熱點推薦: 英語詞匯篇章式記憶匯總(20篇文章稿定)
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A. 1-5 CDBCA 6-10 DABDB 11-15 ABCAC 16-20 BABBC 21-25 BDABB 26-30 BCCDB 31-35 DACDD 36-40 BDAAD 41-45 BBBAC 46-50 DCADD 51-55 ACABC 56-60 BABCB 61-65 CCABB 66-70 BBBAC B. 71. driving 72. to help 73.
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Mr. Robinson had to travel somewhere on business, and as he was in a hurry, he decided to go by __1__ . He liked sitting __2__ a window when he was flying, so he got onto the plane, he looked for a w
2019-07-24
根據(jù)中文提示和英文書信內(nèi)容,寫一封意思連貫、符合邏輯、不少于60詞的回信,信的開頭和結(jié)尾已經(jīng)給出,其字數(shù)不計入所完成的回信內(nèi)。 假如你叫Zhang Fang,是美國中學(xué)生Lucy的筆友,你收到了她的電子郵件。請根據(jù)她
2019-07-24
81. He didn t finish _______(write) the book until last week. 82. --- How long did it take you _______(do) your homework yesterday? --- About half an hour. 83. Let me _______(help) you _______(water)
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2008年政府取消了 五一 黃金周( May golden week ),但是,最近有些人又提出要恢復(fù)7天的長假.同學(xué)們也在校園網(wǎng)的 自由論壇 上展開了激烈的討論.請你選用下面表格所提供的信息,寫一篇短文,談?wù)劵謴?fù)長假的利與弊,
2019-07-24
現(xiàn)在全世界都在倡導(dǎo) 低碳生活 (low-carbon life),即:降低二氧化碳的排放,采取低能量、低消耗、低開支的生活方式。低碳生活對我們大家都有好處,請你寫一篇短文向一家英文報社投稿。內(nèi)容包括:你的具體做法、你的
2019-07-24
( )1. She reached the top of the hill and stopped _______ on a big rock. A. to have rested B. resting C. to rest D. rest ( )2. Do you know the boy _______ under the big tree? A. lay B. lain C. laying
2019-07-24
假如你叫李飛,是學(xué)校 校園英語報 的編輯。你收到你同學(xué)張麗的姐姐的來信。請根據(jù)這位姐姐的要求,給張麗寫一封回信。 Dear Editor, I am really worried about my sister, Zhang Li. She always watches TV or rea
2019-07-24
( )11. The house is not big enough for us all _______. A. to live in B. to be lived in C. to live D. for living in ( )12. A clock is made for _______ us the time. A. tell B. telling C. to tell D. tel
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( )41. We must try our best to stop the pollution _______ a happier life. A. from living B. to live C. living D. live ( )42. --- Hello, what are you reading? --- A book _______ by Bill Gates. A. writ
2019-07-24
假設(shè)你叫Liu Yan,初中三年,你與同學(xué)們在一起學(xué)習(xí)、參加各種活動,相互幫助,彼此之間建立了深厚的友誼.校園網(wǎng)的英語論壇開辟了 Thank you letter 專欄.請按下面的要求給你的同學(xué)Ling Feng寫一封感謝信.注意:1.
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深刻理解概念。 概念是數(shù)學(xué)的基石,學(xué)習(xí)概念(包括定理、性質(zhì))不僅要知其然,還要知其所以然,許多同學(xué)只注重記概念,而忽視了對其背景的理解,這樣是學(xué)不好數(shù)學(xué)的,對于每個定義、定理,我們必須在牢記其內(nèi)容的基礎(chǔ)
2019-07-24
已知:如圖所示,關(guān)于x的拋物線 與x軸交于點A(-2,0)、點B(6,0),與y軸交于點C. (1)求出此拋物線的解析式,并寫出頂點坐標; (2)在拋物線上有一點D,使四邊形ABDC為等腰梯形,寫出點D的坐標,并求出直線AD的解析式;
2019-07-24
如圖,拋物線F: 的頂點為P,拋物線:與y軸交于點A,與直線OP交于點B.過點P作PD x軸于點D,平移拋物線F使其經(jīng)過點A、D得到拋物線F : ,拋物線F 與x軸的另一個交點為C. ⑴當a = 1,b=-2,c = 3時,求點C的坐標(直接
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如圖11,AB是⊙O的直徑,弦BC=2cm, ABC=60?. (1)求⊙O的直徑; (2)若D是AB延長線上一點,連結(jié)CD,當BD長為多少時,CD與⊙O相切; (3)若動點E以2cm/s的速度從A點出發(fā)沿著AB方向運動,同時動點F以1cm/s的速度從B點出發(fā)
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#p#分頁標
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如圖,拋物線的頂點為A,與y 軸交于點B. (1)求點A、點B的坐標. (2)若點P是x軸上任意一點,求證:PA-PB
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#p#分頁標題#e# 答案解析在下一頁 題號 11 12 13 14 15 16 17 18 19 20 答案 B B C C C C D D C A
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