新北师大版八年级上数学期中测试试卷含答案

Shang,andactionShangwithtoXIcomradeforGeneralSecretaryofCentralkeepheightconsistent;anywhenareputdisciplinerulesisinfront,enhancedorganizationconcept,andobeyOrganizationdecided;tosetrightofworldview,andOutlookonlifeAndtoleadacleanslimfamily,alwaysadheretotheCommunists'spiritualhome;toconsciouslypracticetheparty'spurpose,keepingqualities.CPCrequirementsinsection-levelcadresabovetobeabenchmark,playanexemplaryrole,adheretotheloyalcleanplay,JiaoYulu-agoodcadreofactivitiescarriedoutintheordinarypartymemberspracticingpioneerstandardpostsetupactivities.Weallpartymemberstofurtherenhancepoliticalparcore,situationawareness,awareness,awareness,beliefandfaith,accordingtopositions,downtownRiverregulation,diversionofhydraulicProcess,protectionofthemotherRiver,ruralsafetywaterdrinkingproject,constructionoffloodcontrolanddroughtrelief,waterinecologicalcivilizationconstructionandotherkey,think,often,moreactive,hands-on,disciplinedandstrictrules,play,courage,givefullplaytotheexemplaryrole,thesuccessfulcompletionoftasks.Threereformasthecoreofrealchange,completelychange,andchangeimage.Thisfundamentalaimofeducationinordertosolvetheproblem,forthisreason,weinsistonproblem-oriented,enhancetheawarenessofproblems,problemsofreforminplace,continuousimprovementinstyle,tobetterservethepeople,tobetterpromotethewaterconservancywork.Firstofall,tofindtheproblem.I'mlearningeducationprogramme,inviewofthecurrentconstructionoftheparty,proposedtofocusonsolutionoffuzzyidealsandbeliefswaver,consciousness,purposeofthepartyweaksense,honestyandself-disciplineawarenessisnotstrong,depressed,sixissuesofethicalmisconduct.Vastnumbersofpartymembersandcadresshouldcloselyreallifepersonalandideologicalwork,reflectionsonthestandardcontrol,checkthependulumproblem,pinpointproblems,getreal,deep,identification,findthemaintarget,layingtheFoundationforfurthercorrectiveactionimplementation.新北师大版八年级上数学期中测试试卷一、选择题（每小题3分，共18分）1.满足下列条件的三角形中，不是直角三角形的是（）A.三内角之比为1︰2︰3B.三边长的平方之比为1︰2︰3C.三边长之比为3︰4︰5D.三内角之比为3︰4︰52.下列计算结果正确的是（）A.332）（－B.636C.523D.353233.下列说法正确的有（）（1）带根号的数是无理数；（2）无理数是带根号的数；（3）开方开不尽的都是无理数；（4）无理数都是开方开不尽的；（5）无理数是无限小数；（6）无限小数是无理数。A.2个B.3个C.4个D.5个4.若x轴上的点P到y轴的距离为3，则点P的坐标为（）A.（3，0）B.（3，0）或（－3，0）C.（0，3）D.（0，3）或（0，－3）5.y=kx+（k－3）的图象不可能是（）6.如下图，梯子AB靠在墙上。梯子的底端A到墙根O的距离为2m，梯子的顶端B到地面的距离为7m，现将梯子的底端A向外移动到A'，使梯子的底端A到墙根O的距离等于3m，同时梯子的顶端B下降到B'，那么BB'（）A.小于1mB.大于1mC.等于1mD.小于或等于1m二、填空题（每小题3分，共30分）7.2的倒数是；32的相反数是；绝对值等于2的数是。Shang,andactionShangwithtoXIcomradeforGeneralSecretaryofCentralkeepheightconsistent;anywhenareputdisciplinerulesisinfront,enhancedorganizationconcept,andobeyOrganizationdecided;tosetrightofworldview,andOutlookonlifeAndtoleadacleanslimfamily,alwaysadheretotheCommunists'spiritualhome;toconsciouslypracticetheparty'spurpose,keepingqualities.CPCrequirementsinsection-levelcadresabovetobeabenchmark,playanexemplaryrole,adheretotheloyalcleanplay,JiaoYulu-agoodcadreofactivitiescarriedoutintheordinarypartymemberspracticingpioneerstandardpostsetupactivities.Weallpartymemberstofurtherenhancepoliticalparcore,situationawareness,awareness,awareness,beliefandfaith,accordingtopositions,downtownRiverregulation,diversionofhydraulicProcess,protectionofthemotherRiver,ruralsafetywaterdrinkingproject,constructionoffloodcontrolanddroughtrelief,waterinecologicalcivilizationconstructionandotherkey,think,often,moreactive,hands-on,disciplinedandstrictrules,play,courage,givefullplaytotheexemplaryrole,thesuccessfulcompletionoftasks.Threereformasthecoreofrealchange,completelychange,andchangeimage.Thisfundamentalaimofeducationinordertosolvetheproblem,forthisreason,weinsistonproblem-oriented,enhancetheawarenessofproblems,problemsofreforminplace,continuousimprovementinstyle,tobetterservethepeople,tobetterpromotethewaterconservancywork.Firstofall,tofindtheproblem.I'mlearningeducationprogramme,inviewofthecurrentconstructionoftheparty,proposedtofocusonsolutionoffuzzyidealsandbeliefswaver,consciousness,purposeofthepartyweaksense,honestyandself-disciplineawarenessisnotstrong,depressed,sixissuesofethicalmisconduct.Vastnumbersofpartymembersandcadresshouldcloselyreallifepersonalandideologicalwork,reflectionsonthestandardcontrol,checkthependulumproblem,pinpointproblems,getreal,deep,identification,findthemaintarget,layingtheFoundationforfurthercorrectiveactionimplementation.8.已知0)3(22ba，则2)(ba。9.一个实数的两个平方根分别是a+3和2a－5，则这个实数是。10.一次函数y=2x+b的图象与两坐标轴所围成的三角形的面积为8，则b=。11.将一根24cm的筷子，置于底面直径为15cm，高8cm的圆柱形水杯中，如图所示，设筷子露在杯子外面的长度为hcm，则h的取值范围是。12.已知点P（3，－1）关于y轴的对称点Q的坐标是（a+b，l－b），则ab的值为。13.若10的整数部分为a，小数部分为b，则a=，b=。14.如图，已知⊿ABC中，∠A=90°，AB=AC，CD平分∠ACB，DE⊥BC于E，若BC=15，则⊿DEB的周长为。15.已知y－2与x成正比例，当x=3时，y=l，则y与x的函数表达式是。16.已知－2x1，则124422xxxx化简的结果是。三、解答题（共52分）17.计算：（每小题4分，共8分）（1）3181083315275－－；（2）23)3(33271618.（4分）如图，写出△ABC的各顶点坐标，并画出△ABC关于y轴对称的图形。Shang,andactionShangwithtoXIcomradeforGeneralSecretaryofCentralkeepheightconsistent;anywhenareputdisciplinerulesisinfront,enhancedorganizationconcept,andobeyOrganizationdecided;tosetrightofworldview,andOutlookonlifeAndtoleadacleanslimfamily,alwaysadheretotheCommunists'