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關於23B.24C.25D.26的百科

數列{an}的通項公式為an=2n﹣49，當Sn達到最小時，n等於（　　）　A．23B．24C．25D．26

  • 數列{an}的通項公式為an=2n﹣49，當Sn達到最小時，n等於（　　）　A．23B．24C．25D．26

  • 問題詳情：數列{an}的通項公式為an=2n﹣49，當Sn達到最小時，n等於（）A．23B．24C．25D．26【回答】B考點：等差數列的前n項和；等差數列與一次函數的關係．專題：計算題．分析：由已知可判斷數列wie等差數列，並且可得等差數列{an}的前24項為負值，從第25項開始為正值，由出現正項前的和最小可得*．解答：解：由an=2...
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HowtoMakeFriendsGoodfriendshiphasmanyadvantages.   26  ...

  • HowtoMakeFriendsGoodfriendshiphasmanyadvantages.   26  ...

  • 問題詳情：HowtoMakeFriendsGoodfriendshiphasmanyadvantages.   26  Butformanyofusitisdifficultandrequirescourage.Belowaresomehelpfulsuggestionsonhowtomakeandkeepfriends.Startaconversation.Startingaconversationisanimportantstepinmakingnewfriends.____...
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下列為同類項的一組是（　　）A．x3與23B．﹣xy2與yx2     C．7與﹣     D．ab與7a
26.Shecouldn’tunderstandhisteacher

  • 26.Shecouldn’tunderstandhisteacher

  • 問題詳情：26.Shecouldn’tunderstandhisteacher___________(entire).27.Lastmonth,thousandsofhouses__________(destroy)inthestorm.28.JohnGoodallhasdevotedallherlife_______________theprotectionofwildlife.29.Thenumberofpeopletakingpartinthelecturelastweek____...
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在2min內，通過小燈泡燈絲橫截面的電荷量是24C，通過它的電流是　　　　　　A．　
26.Themedicinehaslostits

  • 26.Themedicinehaslostits

  • 問題詳情：26.Themedicinehaslostits____(strong),youcan’ttakeit.27.Howbeautifullyshesings!Ihaveneverhearda____voice.(good)28.Hewasintearsand____(obvious)veryupset.29.---MustIreturnthebooktoday? ---No,you____,youcankeepitforanotherweek.30.ThisisMr.Green...
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26．作文題目：

  • 26．作文題目：

  • 問題詳情：26．作文題目：____________使我受益匪淺要求：（1）橫線上要求填的是一本書的書名或是一篇文章的篇名，要寫的是某一本書或某一篇文章使“我”受益匪淺。文中的“我”必須是考生自己；（2）不僅要寫出書名或文章名，還要寫出作者的姓名或者筆名來；（3）要具體寫出書中或文章中的哪個或哪...
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WhenIwasaboy,everyholidaythatIhadseemedwonderful.My  26...

  • WhenIwasaboy,everyholidaythatIhadseemedwonderful.My  26...

  • 問題詳情：WhenIwasaboy,everyholidaythatIhadseemedwonderful.My  26  tookmebytrainorbycartoahotelbythe  27 .Allday,Iseemtoremember,I  28  onthesandswithstrange  29  children.Wemadehousesandgardens,and  30  thetidedestroythem.Whenthetid...
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Whatisafairwage?    26    Thesearesomeofthequestionsthe...

  • Whatisafairwage?    26    Thesearesomeofthequestionsthe...

  • 問題詳情：Whatisafairwage?    26    ThesearesomeofthequestionstheUnitedNationsInternationalLabourOrganization(ILO)hasrecentlyinvestigated. Withaglobalpopulationofoversevenbillion,isitactuallypossibletomeasureanaverageamount?   27   Using...
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Inmyopinion,weshouldtryourbest   26  (realize)ourgoalse...

  • Inmyopinion,weshouldtryourbest   26  (realize)ourgoalse...

  • 問題詳情：Inmyopinion,weshouldtryourbest   26  (realize)ourgoalseventhough   27 islittlehope.Theeffortsseemtobethelightsinthedarkness,leadingthewaytohopeandsuccess.   Iusedtobe   28  shygirlinmyprimaryschool.IwasweakinEnglishatthattime...
  • 10805
26.Thelittleboywascurious

  • 26.Thelittleboywascurious

  • 問題詳情：26.Thelittleboywascurious________everythingintheexhibitionhall.27.His ________(arrive)broughtcompletesilencetotheroom.28.Whatremindedme________yourfatheristhewayyouspeak.29.Mr.LiYangthinks________necessarythatwereadEnglishaloud.30.HenryAdams...
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26造句怎麼寫

  • 26造句怎麼寫

  • 1、Eachinitialcantakebeoneofthe26Englishletters,meaningthereare26x26=676possiblevaluesforthefirstandlastinitials.2、StudyonPelletsofXL-4-26SolidDispersionsandXL-4-26SolidDispersions;3、26歲時要學會的人生26課。4、ResultsOfatotalof100cases,51(51%)werec...
  • 9826
BEIJING,Feb.26(ChinaDaily)--Asthesmogorangewarningconti...

  • BEIJING,Feb.26(ChinaDaily)--Asthesmogorangewarningconti...

  • 問題詳情：BEIJING,Feb.26(ChinaDaily)--Asthesmogorangewarningcontinues,touristattractionsinBeijingareexperiencingasignificantdecline(下降)invisitornumber.AnewreportlaunchedbyBeijingauthoritiesonthemorningofFebruary24indicatesthattheconcentrationofPM2.5h...
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閲讀程序（如圖），若a=45，b=20，c=10，則輸出的結果為（　　）　A．10B．20C．25D．45
下列染*體數目，一般不可能是體細胞的是A．23B．24C．46D．68

  • 下列染*體數目，一般不可能是體細胞的是A．23B．24C．46D．68

  • 問題詳情：下列染*體數目，一般不可能是體細胞的是A．23B．24C．46D．68【回答】A【解析】試題分析：細胞*中最重要的變化是細胞核中染*體的變化，在細胞*的過程中，染*體複製加倍，隨着*的進行，染*體分成完全相同的兩份，分別進入兩個新細胞中，這種變化的重要意義在於：細胞核中有遺傳物質DNA，而DNA...
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An-26造句怎麼寫

  • An-26造句怎麼寫

  • 1、TheAntonovAn-26isaturbopropmilitarytransportaircraft,amodificationoftheAN-24.2、An-26isthemostwidespreadtransportplaneintheworld.3、An-26cantakeonboardupto5.5tonnesofload(or40paratroopers)andgetittothedistanceof2500kmatanytimeoftheday,evenindiffic...
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Mobilephonesareeverywhereinbigcities.Itseemsthat 26 can...

  • Mobilephonesareeverywhereinbigcities.Itseemsthat 26 can...

  • 問題詳情：Mobilephonesareeverywhereinbigcities.Itseemsthat 26 cansurvivewithoutone.Mobilephonesareagreat 27 tostayconnectedwithfriendsandfamily.28,itisimportanttorememberthattherearecertaintimes 29 youshouldnotbeusingyourphone,especiallyasastuden...
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計算：（﹣）5×26＝　  　．

  • 計算：（﹣）5×26＝　  　．

  • 問題詳情：計算：（﹣）5×26＝  ．【回答】﹣2．【分析】根據冪的乘方解答即可．【解答】解：，故*為：﹣2【點評】此題考查冪的乘方，關鍵是根據冪的乘方的法則解答．知識點：整式的乘法題型：填空題...
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．計算：153°﹣26°40′=

  • ．計算：153°﹣26°40′=

  • 問題詳情：．計算：153°﹣26°40′=_______．【回答】126°20′．【考點】度分秒的換算．【分析】根據度分秒的減法，相同單位相減，不夠減時向上一單位借1當60再減，可得*．【解答】解：原式=152°60′﹣26°40′=126°20′．故*為：126°20′．知識點：角題型：填空題...
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右圖中a點經緯度是A.（2°N，26°E）       B.（2°N，26°W)C.（2°S，26°W）   ...
Thejobsofthefuturehavenotyetbeeninvented.   26   Byhelp...

  • Thejobsofthefuturehavenotyetbeeninvented.   26   Byhelp...

  • 問題詳情：Thejobsofthefuturehavenotyetbeeninvented.   26   Byhelpingthemdevelopclassicskillsthatwillservethemwellnomatterwhatthefutureholds.1.CuriosityYourchildrenneedtobedeeplycurious.   27   Askkids,“Whatingredients(配料)canweaddtomaketh...
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CyberBoy5-26-20122:15pmHi,I’mplanningatriptoEuropethiss...

  • CyberBoy5-26-20122:15pmHi,I’mplanningatriptoEuropethiss...

  • 問題詳情：CyberBoy5-26-20122:15pmHi,I’mplanningatriptoEuropethissummer.Ihaven’tdecidedwheretogoyet,butI’dliketoexperienceBritainandFrance.AndIdon’twanttospendtoomuchmoney,anyideas? Esperanto5-26-20122:23pmIhadtourtoBritainlastyear.It’saverynicepl...
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11°23′26″×3．

  • 11°23′26″×3．

  • 問題詳情：11°23′26″×3．【回答】原式=33°69′78″=34°10′18″．知識點：角題型：計算題...
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如圖，△ABC中，AD是BC的中垂線，若BC=8，AD=6，則圖中*影部分的面積是（　　）　A．48B．24C...
26﹣17+（﹣6）﹣33；

  • 26﹣17+（﹣6）﹣33；

  • 問題詳情：26﹣17+（﹣6）﹣33；【回答】原式＝26﹣6﹣17﹣33＝20﹣40＝﹣20；知識點：有理數的加減法題型：計算題...
  • 4303

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