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2024河南中考学业备考全真模拟试卷(8)数学试卷答案

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omputershavebeenplayingandwinningchmenGrandmasterssethe198medicineswonderifthechess-playingrobothadaflashofrecognition:somerobotsarehelpingtocontrolairplanedsofothers.rosceansndspaceshipsnhsrsheromdrerButthsooavior,whichsckplayingchesshilethe7-yearontheotherehdocointerestsofartistorcomputerengineerwhocoudmakethfdatesDVDwiththenextupdateiesinotherMaybethat'swhentherobotcoudn'keepitstsefaid.32.Whatdoethehhnkrinheingboy?D.Itisunbelievable.oisapplyingA.Itisintentional.B.Itisaccidental.C.Itisunforgivable.zeesintheir33.WhoistoblamefortheattackaccordingtoSergeySmagin?D.Theboy.needtostillA.Theinventor.B.Therobot.C.TheprogramD.Game.”34.Whatdoestheunderlinedword"ambush"inparagraph3mean?B.Attack.C.Defeat.A.Change.35.Whatcanbeinferredabouttherobotfromthelastparagraph?B.Ithasplayedandwon.A.Ithasbeenoutofdate.D.Itmightdislikeitsrole.C.Itfailedtoflyairplanes.根据短文内容，从短文后的选项中选出能填入空白处的最佳选项

选项中有两项为多余选第二节（共5小题：每小题3分，满分15分）项

Managersacrossnearlyeveryindustrybelievedistractionsoarsasthetemperaturerises.36Morethananything,ourenvironmentimpactsourproductivity37Thinkaboutyourmorningcommute:It'sstickyandhumidevenat8a.m.andbythetimeyougetintoyourair-conditionedoffice,you'realreadyexhausted.Heatcausesmanypeopletofeellethargic,makingitmuchmoredifficulttofocusonthatmeetingyouhavefirstthing.on.AbsencesnaturallyimpactproductivitySure,peopletravelanddootherfunactivitiesyear-round,butmanypeoplehavemoregoingontheMoscowbetweenMayandSeptemberthantheydoanyotherperiod.38"Evenifyou'renottakinganexcitinghavebeenvacation,perhapsyourcoworkersareoutoftheofficealot,"Schinkesays."Thiscanimpacttheproductivitycalculatingofthewholeteam.”ayingrobot39.Thesunwon'tsetuntilpast8p.m.,soit'snaturaltowanttosoakupeverymomentafteryouemovedtheescapeyouroverlyair-conditionedoffice.Duringthesemonths,you'refarmorelikelytostayuplater,meaningyoufeelsleepywhenit'stimehannelthattoclockin.It'snottoodifferentthanthedeclineinproductivitythatfollowstheSuperBowlorSttainsafetyPatrick'sDay.40.grammadeA.HerearetherealreasonsB.Temperatureispartofthereasongton,readC.Herearesometipsonhowtodealwithitoy'shandD.Yoursleep(orlackofsleep)canbeafactorebetweenE.MorevacationtimemeanslessprogressctionwithF.Thisisreallywhyyou'relessproductiveinthesummerG.Butinsummer,itcouldbeamorefrequentoccurrence高三英语第6页（共8页）

分析方法一：直接赋值求解，先令x=y=0得f（0）=1，再令x=1，y=-1得f（-1）；
方法二：运用奇偶性求解，可先证函数f（x）-1为奇函数，再根据奇函数的性质求解．

解答解：方法一：直接赋值求解
∵f（x+y）=f（x）+f（y）-1，
∴令x=y=0得，f（0）=f（0）+f（0）-1，解得f（0）=1，
再令x=1，y=-1代入得，f（0）=f（1）+f（-1）-1，
所以，f（-1）=2-f（1）=4；
方法二：运用奇偶性求解
一般地，若f（x）满足：对任意x，y∈R都有f（x+y）=f（x）+f（y）-1，则f（x）-1为奇函数．
证明：∵f（x+y）=f（x）+f（y）-1，
∴f（x+y）-1=[f（x）-1]+[f（y）-1]，
构造函数，F（x）=f（x）-1，则上式可化为，F（x+y）=F（x）+F（y），
显然，F（x）为R上的奇函数，即y=f（x）-1为R上的奇函数．
因而，F（1）+F（-1）=0，即f（1）-1+f（-1）-1=0，解得f（-1）=4，
故答案为：4．

点评本题主要考查了抽象函数及其应用，涉及抽象函数奇偶性的判断和函数值的确定，属于中档题．

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