2024年河南省中招导航模拟试卷(六)数学.考卷答案

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2024年河南省中招导航模拟试卷(六)数学.考卷答案试卷答案

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9.Whatdessertdoesthewomanlikebest?A.Teaicecream.B.Bananacupcakes.C.Strawberrypancakes.听第8段材料,回答第10至12题

10.Howdoesthewomansound?A.Satisfed.B.:Unhappy.C.Excited.11.Whatdoesthewomanprobablydo?A.She'salawyerB.She'sadoctor.C.She'sasalesperson12.Whenwillthewomantakeherholiday?A.Inthesummer.B.InthefallC.Inthewinter.听第9段材料,回答第13至16题

13.Whatisthewomandoing?A.Hostingashow.B.GivingalectureC.Havingaclass.14.HowdidSteven'smotherinfluencehim?A.BysendinghimtopoetryclassesB.Byteachinghimtowritebusinessplans.C.Byaskinghimtoreadfromearly.childhood.15.WhatdoesStevenfindmostdifficultinwriting?A.Findingtherightwords.B.Choosingasuitabtetopic.C.Describingrealexperiences.16.WhatisSteven'sopiniononhisownwriting?A.Creatlve.B.Successful.C.Encouraging.听第10段材料,回答第17至20题

17.Whatistherateoftheaverageglobaltemperatureincrease?A.0.15to0.20Cperyear.B.0.15to0.20Ceveryfiveyears.C.0.15to0.20Cperdecade.18.Atwhataveragetemperaturewillcoralreefsbegintodie?A.35℃B.37℃.C.38℃.l9.Whatwillhappeniftheaveragetemperaturereaches39℃to41℃?Sunflowerswon'tsurviveanymore.B.Mostcountrieswillbedrowned.C.Seaanimalswilldiemassively.20.Whatdoesthespeakermeanintheend?A.Weshouldmakesomechanges.B.Wehavelostourlastchance.C.Weeanstopglobalwarming.高三英语第2页(共12页)

分析求出A中x的范围确定出A,求出B中y的范围确定出B,求出两集合的交集即可.

解答解:由A中y=$\sqrt{{x}^{2}-2x-3}$,得到x2-2x-3≥0,即(x-3)(x+1)≥0,
解得:x≥3或x≤-1,即A=(-∞,-1]∪[3,+∞),
由B中y=$\sqrt{{x}^{2}-2x-3}$≥0,得到B=[0,+∞),
则A∩B=[3,+∞),
故选:C.

点评此题考查了交集及其运算,熟练掌握交集的定义是解本题的关键.