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关于23B.24C.25D.26的百科

数列{an}的通项公式为an=2n﹣49，当Sn达到最小时，n等于（　　）　A．23B．24C．25D．26

  • 数列{an}的通项公式为an=2n﹣49，当Sn达到最小时，n等于（　　）　A．23B．24C．25D．26

  • 问题详情：数列{an}的通项公式为an=2n﹣49，当Sn达到最小时，n等于（）A．23B．24C．25D．26【回答】B考点：等差数列的前n项和；等差数列与一次函数的关系．专题：计算题．分析：由已知可判断数列wie等差数列，并且可得等差数列{an}的前24项为负值，从第25项开始为正值，由出现正项前的和最小可得*．解答：解：由an=2...
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An-26造句怎么写

  • An-26造句怎么写

  • 1、TheAntonovAn-26isaturbopropmilitarytransportaircraft,amodificationoftheAN-24.2、An-26isthemostwidespreadtransportplaneintheworld.3、An-26cantakeonboardupto5.5tonnesofload(or40paratroopers)andgetittothedistanceof2500kmatanytimeoftheday,evenindiffic...
  • 14656
WhenIwasaboy,everyholidaythatIhadseemedwonderful.My  26...

  • WhenIwasaboy,everyholidaythatIhadseemedwonderful.My  26...

  • 问题详情：WhenIwasaboy,everyholidaythatIhadseemedwonderful.My  26  tookmebytrainorbycartoahotelbythe  27 .Allday,Iseemtoremember,I  28  onthesandswithstrange  29  children.Wemadehousesandgardens,and  30  thetidedestroythem.Whenthetid...
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26﹣17+（﹣6）﹣33；

  • 26﹣17+（﹣6）﹣33；

  • 问题详情：26﹣17+（﹣6）﹣33；【回答】原式＝26﹣6﹣17﹣33＝20﹣40＝﹣20；知识点：有理数的加减法题型：计算题...
  • 4303
Thejobsofthefuturehavenotyetbeeninvented.   26   Byhelp...

  • Thejobsofthefuturehavenotyetbeeninvented.   26   Byhelp...

  • 问题详情：Thejobsofthefuturehavenotyetbeeninvented.   26   Byhelpingthemdevelopclassicskillsthatwillservethemwellnomatterwhatthefutureholds.1.CuriosityYourchildrenneedtobedeeplycurious.   27   Askkids,“Whatingredients(配料)canweaddtomaketh...
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在2min内，通过小灯泡灯丝横截面的电荷量是24C，通过它的电流是　　　　　　A．　
如图，△ABC中，AD是BC的中垂线，若BC=8，AD=6，则图中*影部分的面积是（　　）　A．48B．24C...
下列为同类项的一组是（　　）A．x3与23B．﹣xy2与yx2     C．7与﹣     D．ab与7a
Inmyopinion,weshouldtryourbest   26  (realize)ourgoalse...

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

  • 问题详情：Inmyopinion,weshouldtryourbest   26  (realize)ourgoalseventhough   27 islittlehope.Theeffortsseemtobethelightsinthedarkness,leadingthewaytohopeandsuccess.   Iusedtobe   28  shygirlinmyprimaryschool.IwasweakinEnglishatthattime...
  • 10805
BEIJING,Feb.26(ChinaDaily)--Asthesmogorangewarningconti...

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

  • 问题详情：BEIJING,Feb.26(ChinaDaily)--Asthesmogorangewarningcontinues,touristattractionsinBeijingareexperiencingasignificantdecline(下降)invisitornumber.AnewreportlaunchedbyBeijingauthoritiesonthemorningofFebruary24indicatesthattheconcentrationofPM2.5h...
  • 10890
26.Shecouldn’tunderstandhisteacher

  • 26.Shecouldn’tunderstandhisteacher

  • 问题详情：26.Shecouldn’tunderstandhisteacher___________(entire).27.Lastmonth,thousandsofhouses__________(destroy)inthestorm.28.JohnGoodallhasdevotedallherlife_______________theprotectionofwildlife.29.Thenumberofpeopletakingpartinthelecturelastweek____...
  • 6817
26.Thelittleboywascurious

  • 26.Thelittleboywascurious

  • 问题详情：26.Thelittleboywascurious________everythingintheexhibitionhall.27.His ________(arrive)broughtcompletesilencetotheroom.28.Whatremindedme________yourfatheristhewayyouspeak.29.Mr.LiYangthinks________necessarythatwereadEnglishaloud.30.HenryAdams...
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Mobilephonesareeverywhereinbigcities.Itseemsthat 26 can...

  • Mobilephonesareeverywhereinbigcities.Itseemsthat 26 can...

  • 问题详情：Mobilephonesareeverywhereinbigcities.Itseemsthat 26 cansurvivewithoutone.Mobilephonesareagreat 27 tostayconnectedwithfriendsandfamily.28,itisimportanttorememberthattherearecertaintimes 29 youshouldnotbeusingyourphone,especiallyasastuden...
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阅读程序（如图），若a=45，b=20，c=10，则输出的结果为（　　）　A．10B．20C．25D．45
．计算：153°﹣26°40′=

  • ．计算：153°﹣26°40′=

  • 问题详情：．计算：153°﹣26°40′=_______．【回答】126°20′．【考点】度分秒的换算．【分析】根据度分秒的减法，相同单位相减，不够减时向上一单位借1当60再减，可得*．【解答】解：原式=152°60′﹣26°40′=126°20′．故*为：126°20′．知识点：角题型：填空题...
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26造句怎么写

  • 26造句怎么写

  • 1、Eachinitialcantakebeoneofthe26Englishletters,meaningthereare26x26=676possiblevaluesforthefirstandlastinitials.2、StudyonPelletsofXL-4-26SolidDispersionsandXL-4-26SolidDispersions;3、26岁时要学会的人生26课。4、ResultsOfatotalof100cases,51(51%)werec...
  • 9826
26．作文题目：

  • 26．作文题目：

  • 问题详情：26．作文题目：____________使我受益匪浅要求：（1）横线上要求填的是一本书的书名或是一篇文章的篇名，要写的是某一本书或某一篇文章使“我”受益匪浅。文中的“我”必须是考生自己；（2）不仅要写出书名或文章名，还要写出作者的姓名或者笔名来；（3）要具体写出书中或文章中的哪个或哪...
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计算：（﹣）5×26＝　  　．

  • 计算：（﹣）5×26＝　  　．

  • 问题详情：计算：（﹣）5×26＝  ．【回答】﹣2．【分析】根据幂的乘方解答即可．【解答】解：，故*为：﹣2【点评】此题考查幂的乘方，关键是根据幂的乘方的法则解答．知识点：整式的乘法题型：填空题...
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11°23′26″×3．

  • 11°23′26″×3．

  • 问题详情：11°23′26″×3．【回答】原式=33°69′78″=34°10′18″．知识点：角题型：计算题...
  • 5564
HowtoMakeFriendsGoodfriendshiphasmanyadvantages.   26  ...

  • HowtoMakeFriendsGoodfriendshiphasmanyadvantages.   26  ...

  • 问题详情：HowtoMakeFriendsGoodfriendshiphasmanyadvantages.   26  Butformanyofusitisdifficultandrequirescourage.Belowaresomehelpfulsuggestionsonhowtomakeandkeepfriends.Startaconversation.Startingaconversationisanimportantstepinmakingnewfriends.____...
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右图中a点经纬度是A.（2°N，26°E）       B.（2°N，26°W)C.（2°S，26°W）   ...
Whatisafairwage?    26    Thesearesomeofthequestionsthe...

  • Whatisafairwage?    26    Thesearesomeofthequestionsthe...

  • 问题详情：Whatisafairwage?    26    ThesearesomeofthequestionstheUnitedNationsInternationalLabourOrganization(ILO)hasrecentlyinvestigated. Withaglobalpopulationofoversevenbillion,isitactuallypossibletomeasureanaverageamount?   27   Using...
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26.Themedicinehaslostits

  • 26.Themedicinehaslostits

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

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

  • 问题详情：CyberBoy5-26-20122:15pmHi,I’mplanningatriptoEuropethissummer.Ihaven’tdecidedwheretogoyet,butI’dliketoexperienceBritainandFrance.AndIdon’twanttospendtoomuchmoney,anyideas? Esperanto5-26-20122:23pmIhadtourtoBritainlastyear.It’saverynicepl...
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下列染*体数目，一般不可能是体细胞的是A．23B．24C．46D．68

  • 下列染*体数目，一般不可能是体细胞的是A．23B．24C．46D．68

  • 问题详情：下列染*体数目，一般不可能是体细胞的是A．23B．24C．46D．68【回答】A【解析】试题分析：细胞*中最重要的变化是细胞核中染*体的变化，在细胞*的过程中，染*体复制加倍，随着*的进行，染*体分成完全相同的两份，分别进入两个新细胞中，这种变化的重要意义在于：细胞核中有遗传物质DNA，而DNA...
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