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若變量滿足約束條件,則的最大值是A.12B.26C.28D.33
  • 若變量滿足約束條件,則的最大值是A.12B.26C.28D.33

  • 問題詳情:若變量滿足約束條件,則的最大值是A.12B.26C.28D.33【回答】C【詳解】目標函數可以變形爲,做函數的平行線,當其經過點A(4,4)時截距最大時,即z有最大值爲=.[點評]解決線*規劃題目的常規步驟:一列(列出約束條件)、二畫(畫出可行域)、三作(作目標函數變形式的平行線)、四求(求出最優解)....
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(2012年高考(四川文))若變量滿足約束條件,則的最大值是(  )A.12B.26C.28D.33
WASP-12b造句怎麼寫
  • WASP-12b造句怎麼寫

  • Theexoplanet,calledWASP-12b,isagasgiant,likeJupiter.WASP-12bisagaseousplanet,about1.5timesthemassofJupiter,andalmosttwicethesize.被叫作WASP-12b的行星是目前發現的最熱的行星(約4,000華氏度,或約2,200攝氏度),相比於任何一顆已知的行星,它離執行的恆星最近。...
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Boltrunstobigwin (33)
  • Boltrunstobigwin (33)

  • 問題詳情:Boltrunstobigwin (33)_______youareafanofathleticsornot,chancesarethatyouhaveheardofUsainBolt---thefastestmanontheplanet.Afterthe29-year-oldJamaicanhadwonvictoriesinthe100and200metermen’sdashes,Aug29sawhimtakehome(34)_______thirdgoldmedalina...
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有理數-32,(-3)2,|-33|,按從小到大的順序排列是(  ) A.<-32<(-3)2<|-33|  ...
33°15′16″×5.
  • 33°15′16″×5.

  • 問題詳情:33°15′16″×5.【回答】33°15′16″×5=165°+75′+80″=165°+76′+20″=166°16′20″知識點:角題型:計算題...
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已知*A={x|x2+ax+12b=0}和B={x|x2-ax+b=0},滿足(∁RA)∩B={2},A∩(...
  • 已知*A={x|x2+ax+12b=0}和B={x|x2-ax+b=0},滿足(∁RA)∩B={2},A∩(...

  • 問題詳情:已知*A={x|x2+ax+12b=0}和B={x|x2-ax+b=0},滿足(∁RA)∩B={2},A∩(∁RB)={4},求實數a,b的值.【回答】解:由條件(∁RA)∩B={2}和A∩(∁RB)={4},知2∈B,但2∉A;4∈A,但4∉B.將x=2和x=4分別代入B,A兩*中的方程得即解得a=,b=-即爲所求.知識點:*與函數的概念題型:解答題...
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已知3x3y2與﹣2x3my2是同類項,則4m﹣24的值是(  ) A.20B.﹣20C.28D.﹣28
  • 已知3x3y2與﹣2x3my2是同類項,則4m﹣24的值是(  ) A.20B.﹣20C.28D.﹣28

  • 問題詳情:已知3x3y2與﹣2x3my2是同類項,則4m﹣24的值是()A.20B.﹣20C.28D.﹣28【回答】B考點:同類項. 分析:根據同類項的概念求解.解答:解:∵3x3y2與﹣2x3my2是同類項,∴3m=3,∴m=1,則4m﹣24=4﹣24=﹣20.故選B.點評:本題考查了同類項的知識,解答本題的關鍵是掌握同類項定義中的兩個“相同”:相同字母的指數相同...
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二氧化碳的相對分子質量爲(  ) A.44gB.44C.28D.28g
  • 二氧化碳的相對分子質量爲(  ) A.44gB.44C.28D.28g

  • 問題詳情:二氧化碳的相對分子質量爲()A.44gB.44C.28D.28g【回答】考點:相對分子質量的概念及其計算..專題:化學式的計算.分析:根據相對分子質量爲構成分子的各原子的相對原子質量之和;相對分子質量單位是“1”,不是“克”,常常省略不寫;進行分析解答.解答:解:二氧化碳的相對分子質量爲12+16...
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同一主族的兩種元素的原子序數之差不可能是(  )A.16  B.26C.36  D.46
33造句怎麼寫
  • 33造句怎麼寫

  • 33ofLife'sMostPowerfullessons.SeeFigure33forthecorrectplacement.Economiststhoughttheindexwoulddropto33.AnalysisofEndometrialStromalSarcoma-33CasesReportTheexceptionistheyen,undervaluedby33%.ResearchAdvancesinIL-33andReceptorST2Lastyear,carsaleswereu...
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Areyouplanninganewjobornewcareer?(33)
  • Areyouplanninganewjobornewcareer?(33)

  • 問題詳情:Areyouplanninganewjobornewcareer?(33)______ ______theongoingeconomicslowdownmeansmostindustriesstillfacecutbacks(裁員),thereisonefieldthat’slikelytogrowsteadilyinthefuture:HealthCareField.Jobopportunitiesinhealthcareareontheriseandexpectedt...
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爲了求1+3+32+33+…+3100的值,可令M=1+3+32+33+…+3100,則3M=3+32+33+...
  • 爲了求1+3+32+33+…+3100的值,可令M=1+3+32+33+…+3100,則3M=3+32+33+...

  • 問題詳情:爲了求1+3+32+33+…+3100的值,可令M=1+3+32+33+…+3100,則3M=3+32+33+34+…+3101,因此,3M﹣M=3101﹣1,所以M=,即1+3+32+33+…+3100=,仿照以上推理計算:1+5+52+53+…+52015的值是.【回答】.【考點】1E:有理數的乘方.【分析】根據題目資訊,設M=1+5+52+53+…+52015,求出5M,然後相減計算...
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請從33-A或33-B兩題中任選一個作答,若兩題均作答,按33-A計分。33-A 33-B 大理石 (1)實驗...
(-3)×(-0.12)×(-2)×33;
   33.
  •    33.

  • 問題詳情:   33.__________   SongZuyingisthemostfamoussopranoinChina.IntheeyesoftheChinesepeople,SongZuyingisthestarofart.Shewasborninabeautifulplace--GuzhangCountyinWestHunan.Inrecentyears,shehasbeenawardedmanyhighestprizesinvariousmusiccontests...
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AmericansandArabsaredifferent  33  itcomestotheirspaceh...
  • AmericansandArabsaredifferent  33  itcomestotheirspaceh...

  • 問題詳情:AmericansandArabsaredifferent  33  itcomestotheirspacehabits.Arabswouldratherhaveclosecontact.Dr.Hallhasexplainedthat  34  (belong)toatouchcultureandinconversation,theArabsalwaysenvelop(包裹)theotherperson.Theyholdhishand,lookintohiseye...
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KeepingadiaryinEnglishisoneoftheeffectiveways  33  (imp...
  • KeepingadiaryinEnglishisoneoftheeffectiveways  33  (imp...

  • 問題詳情:KeepingadiaryinEnglishisoneoftheeffectiveways  33  (improve)ourEnglishwritingability.  Comparedwithotherformsofwriting,itisshorterandtakes  34 (little)time.ItcanhelpustodevelopthehabitofthinkinginEnglish.Ifwepersist(堅持)inthispracti...
  • 30829
如果a、b爲實數,滿足+b2-12b+36=0,那麼ab的值是
Lastmonth,I(33)
  • Lastmonth,I(33)

  • 問題詳情:Lastmonth,I(33)_______(return)toAustraliatoattendmyeldersister’swedding.Althoughitwasaverymodernwedding,mysisterkeptonetradition(34)_______comesfromanoldEnglishpoem.Thepoemsaysthatabridemustwear:“Somethingold,somethingnew,somethingborroweds...
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計算(﹣3)+(﹣9)的結果是(  ) A.﹣12B.﹣6C.+6D.12
Myhometowniscloseto  (33)   magnificentriver.Atpresent,...
  • Myhometowniscloseto  (33)   magnificentriver.Atpresent,...

  • 問題詳情:Myhometowniscloseto  (33)   magnificentriver.Atpresent,anewthemeparknamed“WaterWorld”isbeingbuilt.Thepark  (34)  (consist)ofthreeparts.Itismodeledafterlifeintheocean.FishLifeisintheeast.Youcanhavealookat  (35)   (vary)kindsoff...
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ADreamRealizedZhaoYang,33,anemployeeofaFrenchcompanyinB...
  • ADreamRealizedZhaoYang,33,anemployeeofaFrenchcompanyinB...

  • 問題詳情:ADreamRealizedZhaoYang,33,anemployeeofaFrenchcompanyinBeijing,whohastraveledextensivelyintheUnitedStatesbymotorbike.IhavebeenaddictedtoHarley-DavidsonmotorcyclessinceIwasyoung,andknowingthatmotorcycle-relatedcultureisverypopularintheUS,Idecid...
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Thebelief(33)
  • Thebelief(33)

  • 問題詳情:Thebelief(33)_________animalscanpredictearthquakeshasbeenaroundforcenturies.In373B.C.,it’srecordedthatanimals,includingrats,snakesandweasels(鼬鼠),desertedtheGreekcityofHelicesjustdaysbefore(34)________quakedestroyedtheplace.Sincethen,thereh...
  • 27420
Fear(33)
  • Fear(33)

  • 問題詳情:Fear(33)______befeltintheheartaswellasinthehead,accordingtoastudythathasfoundalinkbetweenthecyclesofabeatingheartandthechanceofsomeonefeelingfear.Testsonhealthyvolunteersfoundthattheyweremorelikelytofeelasenseoffearatthemomentwhentheirheartsa...
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