计量经济学题库

主蒸汽及高、低温再热蒸汽系统采用单元制系统，均采用“双管、单管、双管”的布置方式。主蒸汽管道和高温再热蒸汽管道分别从过热器和再热器的出口联箱的两侧引出，然后汇成一根母管，到汽轮机前再分成两根支管分别接入高压缸和中压缸左右侧主汽关断阀和再热关断阀。theoilleveltothenormaloillevel.(2)forthesecondarypreventionoftheleakageofcoolingwaterpipefittings,valvepartsbeforeinstallationtocheck...4.2measurestoeliminatequalitydefectsofcablescablelayinginfrontofthecableconstruction,design,supervisionandconstructionunitstodeliverthedesign,anddrawingthethird.Combinedtheengineeringfieldtofindfault,addingomitteditems.BecausetheunitusedcomputerDCScontrolandaddsagreatdealofcontrolandsignalcables.Soyoushouldcarefullyreview,checksformissingphysicalcable,readyforconstructionandtoverifycablelength,specifications,familiarwiththecablechannelandthedevicelocationandbracketcablebracketonthesectionnumber.Atthetimeofpreparationoftheinventoryofcable,firstofall,theprofessionalcarefullystudyelectricalschematics,inaccordancewiththeprincipleofaccountingthecablepathcablevolume,thenumberofcoresused,totalvolumeanddesigninventorycheckcabletocablewithandwithoutomission,layingofthecableinordertoensuretheprocessdoesnotputacableonecable.Finally,atthetimeofinventory,preparedtotakethesamepaththecablestogether.Inventorypreparationiscompleted,laterineachenclosureaffixedonbothsidesofeachsideofthecableyouwanttolayaccuratelyverifycablelengthsandsetaside.Bridgeshouldbecombined,correctingerrors,avoidstraight,nocablebridgescaffoldingusedintheconstruction,notallowedtouseelectricity(fire)cutting,fixcabletray,cabletrayisnotallowedasaweldinggroundconnectionorcabletraycannotbeusedforotherprocesses计量经济学总复习题库一、单项选择题1．计量经济学成为一门独立学科的标志是（B）。A．1930年世界计量经济学会成立B．1933年《计量经济学》会刊出版C．1969年诺贝尔经济学奖设立D．1926年计量经济学（Economics）一词构造出来2．在计量经济模型中，由模型系统内部因素决定，表现为具有一定的概率分布的随机变量，其数值受模型中其他变量影响的变量是（B）。A．内生变量B．外生变量C．滞后变量D．前定变量3．下面属于横截面数据的是（D）。A．1991－2003年各年某地区20个乡镇企业的平均工业产值B．1991－2003年各年某地区20个乡镇企业各镇的工业产值C．某年某地区20个乡镇工业产值的合计数D．某年某地区20个乡镇各镇的工业产值4．经济计量分析工作的基本步骤是（A）。A．设定理论模型→收集样本资料→估计模型参数→检验模型B．设定模型→估计参数→检验模型→应用模型C．个体设计→总体估计→估计模型→应用模型D．确定模型导向→确定变量及方程式→估计模型→应用模型主蒸汽及高、低温再热蒸汽系统采用单元制系统，均采用“双管、单管、双管”的布置方式。主蒸汽管道和高温再热蒸汽管道分别从过热器和再热器的出口联箱的两侧引出，然后汇成一根母管，到汽轮机前再分成两根支管分别接入高压缸和中压缸左右侧主汽关断阀和再热关断阀。theoilleveltothenormaloillevel.(2)forthesecondarypreventionoftheleakageofcoolingwaterpipefittings,valvepartsbeforeinstallationtocheck...4.2measurestoeliminatequalitydefectsofcablescablelayinginfrontofthecableconstruction,design,supervisionandconstructionunitstodeliverthedesign,anddrawingthethird.Combinedtheengineeringfieldtofindfault,addingomitteditems.BecausetheunitusedcomputerDCScontrolandaddsagreatdealofcontrolandsignalcables.Soyoushouldcarefullyreview,checksformissingphysicalcable,readyforconstructionandtoverifycablelength,specifications,familiarwiththecablechannelandthedevicelocationandbracketcablebracketonthesectionnumber.Atthetimeofpreparationoftheinventoryofcable,firstofall,theprofessionalcarefullystudyelectricalschematics,inaccordancewiththeprincipleofaccountingthecablepathcablevolume,thenumberofcoresused,totalvolumeanddesigninventorycheckcabletocablewithandwithoutomission,layingofthecableinordertoensuretheprocessdoesnotputacableonecable.Finally,atthetimeofinventory,preparedtotakethesamepaththecablestogether.Inventorypreparationiscompleted,laterineachenclosureaffixedonbothsidesofeachsideofthecableyouwanttolayaccuratelyverifycablelengthsandsetaside.Bridgeshouldbecombined,correctingerrors,avoidstraight,nocablebridgescaffoldingusedintheconstruction,notallowedtouseelectricity(fire)cutting,fixcabletray,cabletrayisnotallowedasaweldinggroundconnectionorcabletraycannotbeusedforotherprocesses5．将内生变量的前期值作解释变量，这样的变量称为（D）。A．虚拟变量B．控制变量C．政策变量D．滞后变量6．同一统计指标按时间顺序记录的数据列称为（B）。A．横截面数据B．时间序列数据C．修匀数据D．原始数据7．进行相关分析时的两个变量（A）。A．都是随机变量B．都不是随机变量C．一个是随机变量，一个不是随机变量D．随机的或非随机都可以8．表示x和y之间真实线性关系的是（C）。A．01ˆˆˆttYXB．01()ttEYXC．01tttYXuD．01ttYX9．参数的估计量ˆ具备有效性是指（B）。A．ˆvar()=0B．ˆvar()为最小C．ˆ()0－＝D．ˆ()－为最小10．对于01ˆˆiiiYXe，以ˆ表示估计标准误差，Yˆ表示回归值，则（B）。A．iiˆˆ0YY0＝时，（－）＝B．2iiˆˆ0YY＝时，（－）＝0C．iiˆˆ0YY＝时，（－）为最小D．2iiˆˆ0YY＝时，（－）为最小11．产量（X，台）与单位产品成本（Y，元/台）之间的回归方程为ˆY3561.5X＝，这说明（D）。A．产量每增加一台，单位产品成本增加356元B．产量每增主蒸汽及高、低温再热蒸汽系统采用单元制系统，均采用“双管、单管、双管”的布置方式。主蒸汽管道和高温再热蒸汽管道分别从过热器和再热器的出口联箱的两侧引出，然后汇成一根母管，到汽轮机前再分成两根支管分别接入高压缸和中压缸左右侧主汽关断阀和再热关断阀。theoilleveltothenormaloillevel.(2)forthesecondarypreventionoftheleakageofcoolingwaterpipefittings,valvepartsbeforeinstallationtocheck...4.2measurestoeliminatequalitydefectsofcablescablelayinginfrontofthecableconstruction,design,supervisionandconstructionunitstodeliverthedesign,anddrawingthethird.Combinedtheengineeringfieldtofindfault,addingomitteditems.BecausetheunitusedcomputerDCScontrolandaddsagreatdealofcontrolandsignalcables.Soyoushouldcarefullyreview,checksformissingphysicalcable,readyforconstructionandtoverifycablelength,specifications,familiarwiththecablechannelandthedevicelocationandbracketcablebracketonthesectionnumber.Atthetimeofpreparationoftheinventoryofcable,firstofall,theprofessionalcarefullystudyelectricalschematics,inaccordancewiththeprincipleofaccountingthecablepathcablevolume,thenumberofcoresused,totalvolumeanddes