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1、XXX学校2014-2015学年度2月同步练习学校:姓名:班级:考号:第I卷(选择题)请点击修改第I卷的文字说明评卷人得分一、选择题(本题共20道小题,每小题0分,共0分)1.【来源】2014年高考真题一一理科数学(安徽卷)义+y—2<0,x,y满兄约束条件、久-2),-2<0,若z=y-ax取得最大值的最优解不哗丁,则实数a.的2x-y+2>0.值为(A)丄或-12(B)2或丄2(C)2或1(D)2或-12.【來源】2014高考真题理科数学(辽宁卷)当xe[—2,1]时,不等式o?—x2+4;v+320恒成立,则实数a的収值范围是()9A.[—5,一3
2、]B.[一6,—]C.[—6,—2]D.[—4,—3]83.【來源】2014年高考真题一一理科数学(湖北卷)由不等式%<0^>0确定的平面区域记为£2,,不等式y-%-2<0x+y<1x+〉,>-2确定的平区域记为在中随机取一点,则该点恰好在内的概率为(A.1B.-4C.I4.【来源】2014年高考真题理科数学(山东卷)已知x,y满足约束条件%—y—1<0,2x-y-3>0,当目标函数z=ax+by(a>0,/?>0)在该约束条件下取到最小值2^时,6Z2+/?2的最小值为(A)5(B)4(C)75(D)25.【来源】2014年高考真题理科数学(四川卷)
3、若设<7〉/?〉0,C<6/<0,则一定有()&->dlcAIn--J<-cB(C)—>—(D)—<—clcdc1.【来源】2014年高考真题理科数学(四川卷)已知集合焱={又
4、义2—x—2幺0},集合S为整数集,则()(A){—1,0,1,2}(B){—2,—1,0,1}(C){0,1}(D){—1,0}2.【来源】2014年高考真题理科数学(映西卷)Inthepast,peopleusuallybelievedwhatnewlybornbabieswantedwasfoodandtobekeptwarmanddry.Theythoughtbabies
5、werenotableto36thingsuntiltheywerefiveorsixmonthsold.37-theresearchersintheUnitedStatesnowbelievebabiesbeginlearningontheirfirstoflife.Theysaybabiesarestrongly39bytheirenvironmentandonebabywill40一ifhisorhermotherdoessomethingthatthebabylikes.Ababylearnstogetthebestcarepossiblebys
6、milingtohermother.Thisishowbabiesstarttolearnto42andcommunicatewithotherpeople.Theresearcherssaythisabilitytolearn_43_inababyevenbeforebirth.Theyalso—44_theideathatnewlybornbabiescanandunderstandsoundstheyheardwhiletheywerestill46insidetheirmothers.Recently,anAmericanstudy—47_112
7、babiesfoundbabieslearnedbetterwhentheywere_48_.Thebabiesappearedtolearnwellwhethertheyweresittingupontheirown,sittinginseatsor49tositup.Theresearcherssaykeepingthatkind50hadwhattheycalleda51_effectonthebabies’abilitytolearnaboutobjects.Theysaythebodypositionmaybelinkedtodevelopme
8、ntinthe_52_,One53_saysbabiescanpaymoreattentionto54anobjectiftheydonothavetobe55abouttheirbalance.36.A.eatB.knowC.rememberD.learn37.A.BesidesB.WhileC.ButD.Therefore38.A.hourB.dayC.weekD.monthB.acceptedB.smileB.loveB.connectB.informsB.supportB.realizeCB.deliveringB.raisingB.lyingd
9、ownCB.forcedB.gestureB.unmarkedB.feeling