冀教版-七年级数学下册期末测试题2

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relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod1,andtoolmeasurement2,andestimates16,andsubject:geometrypreliminaryknowledge(1)--lineandanglereviewcontentline,andsegment,andRay,andvertical,andparallel,andangleangleofclassification(slightly)17,andsubject:geometrypreliminaryknowledge(2)--planegraphicsreviewcontenttriangle,andedgesshaped,andround,andfanaxisymmetricgraphicsperimeterandareacombinationgraphicsofareasubject:Preliminaryknowledge(3)-reviewofsolidcontentcategory1-dshapesaredividedinto:cylinderandcone2,columnisdividedinto:cuboid,square3,coneconeofthefeaturesofcuboidsandcubesrelationshipbetweencharacteristicsofcircularconeisslightlysolidsurfaceareaandvolume1,size2,table...和和平与发展是当今世界发展的主题,中国作为屹立在世界东方的大国,要担负起重要的责任。从“亚太自由贸易区”到“亚投行”、“一带一路”,再到G20峰会,都体现出中国一个负责任的大国形象。PCBA七年级下期期末数学测试题一、选择题:(本大题共10个小题,每小题3分,共30分)1.下列计算错误的是·······························()A.743xxxB.632)(xxC.xxx33D.844216)2(yxxy2.若m>-1,则下列各式中错误的...是()A.6m>-6B.-5m<-5C.m+1>0D.1-m<23.已知a>b>0,那么下列不等式组中无解..的是()A.bxaxB.bxaxC.bxaxD.bxax4.一辆汽车在公路上行驶,两次拐弯后,仍在原来的方向上平行行驶,那么两个拐弯的角度可能为()(A)先右转50°,后右转40°(B)先右转50°,后左转40°(C)先右转50°,后左转130°(D)先右转50°,后左转50°5.解为12xy的方程组是()A.135xyxyB.135xyxyC.331xyxyD.2335xyxy6.如图,在△ABC中,∠ABC=600,∠ACB=800,BP平分∠ABC,CP平分∠ACB,则∠BPC的大小是()A.1000B.1100C.1150D.12007.四条线段的长分别为3,4,5,7,则它们首尾相连可以组成不同的三角形的个数是()A.4B.3C.2D.18.下列各式中,与2)1(a相等的是()A.12aB.12aC.122aaD.122aa9.如图,已知ABOC,OD平分AOC,D、O、E、三点在同一条直线上,那么AOE等于()A.45B.50C.135D.15510、为保护生态环境,陕西省某县响应国家“退耕还林”号召,将某一部分耕地改为林地,改变后,林地面积和耕地面积共有180平方千米,耕地面积是林地面积的25%,为求改变后林地面积和耕地面积各多少平方千米。设改变后耕地面积x平方千米,林地地面积y平方千米,根据题意,列出如下四个方程组,其中正确的是()A%25180xyyxB%25180yxyxC%25180yxyxD%25180xyyxCDOBAErelationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod1,andtoolmeasurement2,andestimates16,andsubject:geometrypreliminaryknowledge(1)--lineandanglereviewcontentline,andsegment,andRay,andvertical,andparallel,andangleangleofclassification(slightly)17,andsubject:geometrypreliminaryknowledge(2)--planegraphicsreviewcontenttriangle,andedgesshaped,andround,andfanaxisymmetricgraphicsperimeterandareacombinationgraphicsofareasubject:Preliminaryknowledge(3)-reviewofsolidcontentcategory1-dshapesaredividedinto:cylinderandcone2,columnisdividedinto:cuboid,square3,coneconeofthefeaturesofcuboidsandcubesrelationshipbetweencharacteristicsofcircularconeisslightlysolidsurfaceareaandvolume1,size2,table...和和平与发展是当今世界发展的主题,中国作为屹立在世界东方的大国,要担负起重要的责任。从“亚太自由贸易区”到“亚投行”、“一带一路”,再到G20峰会,都体现出中国一个负责任的大国形象。二、填空题:(每小题3分,共30分.)11.已知|m-2|+(3-n)2=0,则-nm=。12.“a的3倍与4的差不大于1”列出不等式是。13.在△ABC中,∠A=90°,∠B-∠C=14°,则∠B=°,∠C=°。14.一个两位数,十位数字比个位数字大5,,且这个两位数比两个数位上的数字之和的8倍还大5.如果设个位上的数为x,则可列方程。15.不等式2734xx的正整数解是_____.16.分解因式:3xx=__________.17.人体内有种细胞的直径为0.0105米,用科学记数法表示这个数为米。18.如图,∠1=55°,a∥b,则∠2=度。19.如果1kxx2是一个完全平方式,那么k的值是.20.现在规定两种新的运算“﹡”和“◎”:a﹡b=22ba;a◎b=2ab,如(2﹡3)(2◎3)=(22+32)(2×2×3)=156,则[2﹡(-1)][2◎(-1)]=.21.分解因式:(每小题4分,本题共8分)(1)xx3(2)-2x+x2+122.计算或化简:(每小题4分,本题共8分)(1)(—3)0+(+0.2)2009×(+5)2010(2)2(x+4)(x-4)三、解答题:23.从小明家到公路建一条水泥路,作出最短路线,并说明理由。24.解不等式组:.21512,4)2(3xxxx,并把解集在数轴上表示出来.21ab小明家relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeri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