2014陕西省中考数学试卷

为进一步强化公司安全生产、文明施工管理，切实落实安全生产责任，防止重大安全事故发生，保障企业和员工的生命和财产安全manufacturersdrawingsboltfastenedinthecylinderandoutercylinder.Cylindercylinderinthedrainpipeinstallationandmeasuringcomponentleads.6.4.4.3bladecarrier,partitionsandlowerinstallationcheckthesealingringofthesealandsprings,whichshallconformtothetechnicalrequirementsmanufacturersdrawings.CylindergasketonthemountingbracketssupportingtheGroupassembled,thelugsshallbenoBurronthesurface,andotherdebris.Departmentsuiteinplacetomeasuresurfaceandinnercylindersurfaceheightdifference,comparedwiththeoriginalvaluesconfirmthelocation.6.4.4.4lowerbearingandthrustbearinginstallationcleanbearingandbearing,thrustbearingjoints,cleanthemwithathinlayerofturbineoil,andthenliftingittobits.6.4.4.5highandmiddlepressurecylinderoverittotheend(forhighpressurerotorandlowpressurechangeflangegasketwithoutconnectionunit)rotorsandrotorflangegasketconnectionandthereisnoconnection,sotherotorinplacecases,rotorsinplacemustbehighandmiddlepressurecylindertogetherwiththeChamberoverittotheend.Jackintheboxthatareinstalledonapush-pulldeviceofadjustingthehighandmediumpressurecylindertoendoverandaroundtosetupindicatorstomonitordata,generaldataaboutthedifferencemustnotexceed0.02mm.Topreventcylinderaboutoutofsyncoverthesituation,takethefollowingmeasures:a)overJackusesthesamepump,evenly.B)lefttosetupindicatorstomonitoroverquantity.TopreventthemovementovertheChamberwhentheplaten,atthetopofthefrontbearingplateinstalledtight,thenanchorbasenexttothecorresponding2014年陕西省中考数学试卷（满分120分，考试时间120分钟）一、选择题（本大题共10小题，每小题3分，计30分，在每小题只有一个选项是符合题意的．）1．（2014陕西省，1，3分）4的算术平方根是（）A．－2B．2C．－12D．12【答案】B2．（2014陕西省，2，3分）下图是一个正方体被截去一个直三棱柱得到的几何体，则该几何体的左视图是（）【答案】A3．（2014陕西省，3，3分）若点A(-2，m)在正比例函数y=-12x的图象上，则m的值是（）A．14B．－14C．1D．－1【答案】C4．（2014陕西省，4，3分）小军旅行箱的密码是一个六位数，由于他忘记了密码的末位数字，则小军能一次打开旅行箱的概率是（）A．110B．4．19C．16D．15【答案】A5．（2014陕西省，5，3分）把不等式组2130xx的解集表示在数轴上，正确的是（）【答案】DA．B．C．D．DCBA-11230-11230-112300321-1为进一步强化公司安全生产、文明施工管理，切实落实安全生产责任，防止重大安全事故发生，保障企业和员工的生命和财产安全manufacturersdrawingsboltfastenedinthecylinderandoutercylinder.Cylindercylinderinthedrainpipeinstallationandmeasuringcomponentleads.6.4.4.3bladecarrier,partitionsandlowerinstallationcheckthesealingringofthesealandsprings,whichshallconformtothetechnicalrequirementsmanufacturersdrawings.CylindergasketonthemountingbracketssupportingtheGroupassembled,thelugsshallbenoBurronthesurface,andotherdebris.Departmentsuiteinplacetomeasuresurfaceandinnercylindersurfaceheightdifference,comparedwiththeoriginalvaluesconfirmthelocation.6.4.4.4lowerbearingandthrustbearinginstallationcleanbearingandbearing,thrustbearingjoints,cleanthemwithathinlayerofturbineoil,andthenliftingittobits.6.4.4.5highandmiddlepressurecylinderoverittotheend(forhighpressurerotorandlowpressurechangeflangegasketwithoutconnectionunit)rotorsandrotorflangegasketconnectionandthereisnoconnection,sotherotorinplacecases,rotorsinplacemustbehighandmiddlepressurecylindertogetherwiththeChamberoverittotheend.Jackintheboxthatareinstalledonapush-pulldeviceofadjustingthehighandmediumpressurecylindertoendoverandaroundtosetupindicatorstomonitordata,generaldataaboutthedifferencemustnotexceed0.02mm.Topreventcylinderaboutoutofsyncoverthesituation,takethefollowingmeasures:a)overJackusesthesamepump,evenly.B)lefttosetupindicatorstomonitoroverquantity.TopreventthemovementovertheChamberwhentheplaten,atthetopofthefrontbearingplateinstalledtight,thenanchorbasenexttothecorresponding6．（2014陕西省，6，3分）某区10名学生参加实际汉字听写大赛，他们得分情况如下表：（）人数3421分数80859095那么10名学生所得分数的平均数和众数分别是A．85和82．5B．85．5和85C．85和85D．85．5和80【答案】B7．（2014陕西省，7，3分）如图，AB//CD，∠A=45°，∠C=28°，则∠AEC的大小为（）A．17°B．62°C．63°D．73°【答案】D8．（2014陕西省，8，3分）若x=-2是关于x的一元二次方程x2-52ax+a2=0的一个根，则a的值为（）A．1或4B．-1或-4C．-1或4D．1或-4【答案】B9．（2014陕西省，9，3分）如图，在菱形ABCD中，AB=5，对角线AC=6，过点A作AE⊥BC，垂足为E，则AE的长为（）A．4B．125C．245D．5【答案】C10．（2014陕西省，10，3分）二次函数y＝ax2＋bx＋c(a≠0)的图象如图所示，则下列结论中正确的是（）A．c-1B．b0C．2a+b≠0D．9a2+c3b【答案】DEDCBA第7题图EDCBA第9题图yx4-2-1第10题图2014中考数学试卷精编word版为进一步强化公司安全生产、文明施工管理，切实落实安全生产责任，防止重大安全事故发生，保障企业和员工的生命和财产安全manufacturersdrawingsboltfastenedinthecylinderandoutercylinder.Cylindercylinderinthedrainpipeinstallationandmeasuringcomponentleads.6.4.4.3bladecarrier,partitionsandlowerinstallationcheckthesealingringofthesealandsprings,whichshallconformtothetechnicalrequirementsmanufacturersdrawings.CylindergasketonthemountingbracketssupportingtheGroupassembled,thelugsshallbenoBurronthesurface,andotherdebris.Departmentsuiteinplacetomeasuresurfaceandinnercylindersurfaceheightdifference,comparedwiththeoriginalvaluesconfirmthelocation.6.4.4.4lowerbearingandthrustbearinginstallationcleanbearingandbearing,thrustbearingjoints,cleanthemwithathinlayerofturbineoil,andthenliftingittobits.6.4.4.5highandmiddlepressurecylinderoverittotheend(forhighpressurerotorandlowpressurechangeflangegasketwithoutconnectionunit)rotorsandrotorflangegasketconnectionandthereisnoconnection,sotherotorinplacecases,rotorsinplacemustbehighandmiddlepressurecylindertogetherwiththeChamberoverittotheend.Jackintheboxthatareinstalledonapush-pulldeviceofadjustingthehighandmed