- 问题详情:若变量满足约束条件,则的最大值是A.12B.26C.28D.33【回答】C【详解】目标函数可以变形为,做函数的平行线,当其经过点A(4,4)时截距最大时,即z有最大值为=.[点评]解决线*规划题目的常规步骤:一列(列出约束条件)、二画(画出可行域)、三作(作目标函数变形式的平行线)、四求(求出最优解)....
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- 问题详情:(2012年高考(四川文))若变量满足约束条件,则的最大值是()A.12B.26C.28D.33【回答】C【解析】目标函数可以变形为,做函数的平行线,当其经过点B(4,4)时截距最大时,即z有最大值为=.【点评】解决线*规划题目的常规步骤:一列(列出约束条件)、二画(画出可行域)、三作(作目标函数...
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- 问题详情:Myhometowniscloseto (33) magnificentriver.Atpresent,anewthemeparknamed“WaterWorld”isbeingbuilt.Thepark (34) (consist)ofthreeparts.Itismodeledafterlifeintheocean.FishLifeisintheeast.Youcanhavealookat (35) (vary)kindsoff...
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- 问题详情:KeepingadiaryinEnglishisoneoftheeffectiveways 33 (improve)ourEnglishwritingability. Comparedwithotherformsofwriting,itisshorterandtakes 34 (little)time.ItcanhelpustodevelopthehabitofthinkinginEnglish.Ifwepersist(坚持)inthispracti...
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- 问题详情:ADreamRealizedZhaoYang,33,anemployeeofaFrenchcompanyinBeijing,whohastraveledextensivelyintheUnitedStatesbymotorbike.IhavebeenaddictedtoHarley-DavidsonmotorcyclessinceIwasyoung,andknowingthatmotorcycle-relatedcultureisverypopularintheUS,Idecid...
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- 问题详情:计算(﹣3)+(﹣9)的结果是()A.﹣12B.﹣6C.+6D.12【回答】A知识点:各地中考题型:选择题...
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- 问题详情:为了求1+3+32+33+…+3100的值,可令M=1+3+32+33+…+3100,则3M=3+32+33+34+…+3101,因此,3M﹣M=3101﹣1,所以M=,即1+3+32+33+…+3100=,仿照以上推理计算:1+5+52+53+…+52015的值是.【回答】.【考点】1E:有理数的乘方.【分析】根据题目信息,设M=1+5+52+53+…+52015,求出5M,然后相减计算...
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- 问题详情:请从33-A或33-B两题中任选一个作答,若两题均作答,按33-A计分。33-A 33-B 大理石 (1)实验室用高锰*钾制取氧气的化学方程式为 。(2)*收集到的气体为氧气的方法是 。(1)用大理石和稀盐*制取二氧化碳的化学方程式为 。(2)检验二氧化碳已经收集满的方...
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- 问题详情:(-3)×(-0.12)×(-2)×33;【回答】-30 知识点:有理数的乘除法题型:计算题...
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- 33ofLife'sMostPowerfullessons.SeeFigure33forthecorrectplacement.Economiststhoughttheindexwoulddropto33.AnalysisofEndometrialStromalSarcoma-33CasesReportTheexceptionistheyen,undervaluedby33%.ResearchAdvancesinIL-33andReceptorST2Lastyear,carsaleswereu...
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- 问题详情:如果a、b为实数,满足+b2-12b+36=0,那么ab的值是_______.【回答】 -知识点:实数题型:填空题...
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- 问题详情:二氧化碳的相对分子质量为()A.44gB.44C.28D.28g【回答】考点:相对分子质量的概念及其计算..专题:化学式的计算.分析:根据相对分子质量为构成分子的各原子的相对原子质量之和;相对分子质量单位是“1”,不是“克”,常常省略不写;进行分析解答.解答:解:二氧化碳的相对分子质量为12+16...
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- 问题详情:Fear(33)______befeltintheheartaswellasinthehead,accordingtoastudythathasfoundalinkbetweenthecyclesofabeatingheartandthechanceofsomeonefeelingfear.Testsonhealthyvolunteersfoundthattheyweremorelikelytofeelasenseoffearatthemomentwhentheirheartsa...
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- 问题详情:Boltrunstobigwin (33)_______youareafanofathleticsornot,chancesarethatyouhaveheardofUsainBolt---thefastestmanontheplanet.Afterthe29-year-oldJamaicanhadwonvictoriesinthe100and200metermen’sdashes,Aug29sawhimtakehome(34)_______thirdgoldmedalina...
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- 问题详情:已知*A={x|x2+ax+12b=0}和B={x|x2-ax+b=0},满足(∁RA)∩B={2},A∩(∁RB)={4},求实数a,b的值.【回答】解:由条件(∁RA)∩B={2}和A∩(∁RB)={4},知2∈B,但2∉A;4∈A,但4∉B.将x=2和x=4分别代入B,A两*中的方程得即解得a=,b=-即为所求.知识点:*与函数的概念题型:解答题...
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- 问题详情:Lastmonth,I(33)_______(return)toAustraliatoattendmyeldersister’swedding.Althoughitwasaverymodernwedding,mysisterkeptonetradition(34)_______comesfromanoldEnglishpoem.Thepoemsaysthatabridemustwear:“Somethingold,somethingnew,somethingborroweds...
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- 问题详情: 33.__________ SongZuyingisthemostfamoussopranoinChina.IntheeyesoftheChinesepeople,SongZuyingisthestarofart.Shewasborninabeautifulplace--GuzhangCountyinWestHunan.Inrecentyears,shehasbeenawardedmanyhighestprizesinvariousmusiccontests...
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- 问题详情:已知3x3y2与﹣2x3my2是同类项,则4m﹣24的值是()A.20B.﹣20C.28D.﹣28【回答】B考点:同类项. 分析:根据同类项的概念求解.解答:解:∵3x3y2与﹣2x3my2是同类项,∴3m=3,∴m=1,则4m﹣24=4﹣24=﹣20.故选B.点评:本题考查了同类项的知识,解答本题的关键是掌握同类项定义中的两个“相同”:相同字母的指数相同...
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- 问题详情:AmericansandArabsaredifferent 33 itcomestotheirspacehabits.Arabswouldratherhaveclosecontact.Dr.Hallhasexplainedthat 34 (belong)toatouchcultureandinconversation,theArabsalwaysenvelop(包裹)theotherperson.Theyholdhishand,lookintohiseye...
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- Theexoplanet,calledWASP-12b,isagasgiant,likeJupiter.WASP-12bisagaseousplanet,about1.5timesthemassofJupiter,andalmosttwicethesize.被叫作WASP-12b的行星是目前发现的最热的行星(约4,000华氏度,或约2,200摄氏度),相比于任何一颗已知的行星,它离运行的恒星最近。...
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- 问题详情:Areyouplanninganewjobornewcareer?(33)______ ______theongoingeconomicslowdownmeansmostindustriesstillfacecutbacks(裁员),thereisonefieldthat’slikelytogrowsteadilyinthefuture:HealthCareField.Jobopportunitiesinhealthcareareontheriseandexpectedt...
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- 问题详情:同一主族的两种元素的原子序数之差不可能是()A.16 B.26C.36 D.46【回答】解析:选D以惰*元素的原子序数为特例,惰*元素的原子序数分别为2、10、18、36、54、86、118,则16=18-2,26=36-10,36=54-18,A、B、C项均有可能,D不可能。知识点:元素周期律题型:选择题...
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- 问题详情:Thebelief(33)_________animalscanpredictearthquakeshasbeenaroundforcenturies.In373B.C.,it’srecordedthatanimals,includingrats,snakesandweasels(鼬鼠),desertedtheGreekcityofHelicesjustdaysbefore(34)________quakedestroyedtheplace.Sincethen,thereh...
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- 问题详情:33°15′16″×5.【回答】33°15′16″×5=165°+75′+80″=165°+76′+20″=166°16′20″知识点:角题型:计算题...
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- 问题详情:有理数-32,(-3)2,|-33|,按从小到大的顺序排列是( ) A.<-32<(-3)2<|-33| B.|-33|<-32<<(-3)2C.-32<<(-3)2<|-33| D.<-32<|-33|<(-3)2【回答】C知识点:有理数的乘方题型:选择题...
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