职高数学《集合》练习题

在本省行政区域内从事草原保护、管理、建设和利用以及承包经营等活动，适用本条例。本条例所称草原，是指具有草原生态功能或者适用于畜牧业生产的天然草原和人工草地。天然草原包括草地、草山和草坡，人工草地包括改良草地和退耕还草地。appearanceoftheweldappearancequalitytechnicalrequirementsoftheprojectmustnothaveamoltenmetalstreamdoesnotmeltthebasemetaltoweld,weldseamandheat-affectedzonesurfacemustnothavecracks,pores,defectssuchascraterandash,surfacesmoothing,weldandbasemetalshouldbeevenlysmoothtransition.Width2-3mmfromtheedgeofweldGroove.Surfacereinforcementshouldbelessthanorequalto1+0.2timestheslopeedgewidth,andshouldnotbegreaterthan4mm.Depthofundercutshouldbelessthanorequalto0.5mm,totallengthoftheweldsonbothsidesundercutnotexceed10%oftheweldlength,andlongcontinuousshouldnotbegreaterthan100mm.Wrongsideshouldbelessthanorat0.2T,andshouldnotbegreaterthan2mm(wallthicknessmmt)incompleteornotallow7.57.5.1installationqualityprocessstandardsoftheelectricalenclosureCabinetsurfaceisclean,neat,nosignificantphenomenonofconvex,closetonature,closethedoor.7.5.2CabinetCabinetfacepaintsnopaint,returnedtorusted,consistentcolor.7.5.3uniformindirectgapfromtoptobottom,slotwidth1.5mm7.5.4adjacentCabinetsurfaceroughnessis0.7.5.5thecabinetsfirmlyfixed,craftsbeautiful.7.5.6Cabinetsurfacegauge,switchcabinetmarkclear,neat,firmpaste.7.5.7Terminalrowofneat,isreliable,theappearanceiscleanandnotdamaged.7.5.8cablesneatandclean,solidbinding,bindingprocessinappearance.7.5.9thefirstcableproductionfirm,craftsbeautiful,clearsignagedoesnotfade.7.5.10fireproofpluggingtight,nocracksandpores.7.67.6.1ofthestandardelectricalwiringqualitytechnologycablea,themulti-corewirebuncharrangementshouldbeparalleltoeachother,horizontalwireharnessorwireshouldbeperpendiculartothelongitudinalmulti-corewirebunch.Thedistancebetweenthewireharnessandwireharnesssymmetry,andascloseaspossible.B-corewiringharnessintoround,multi-corewirebunchusedgwirebinding,fastening（一）集合及表示方法1、“①难解的题目;②方程012x;③平面直角坐标系内第四象限的一些点;④很多多项式”中，能组成集合的是()。A.②B.①③C.②④D.①②④2．下列选项中元素的全体可以组成集合的是（）A.学校篮球水平较高的学生B.校园中长的高大的树木C.2007年所有的欧盟国家D.中国经济发达的城市3、下列命题正确的个数为…………………()。（1）很小两实数可以构成集合；（2）}1|{2xyy与}1|),{(2xyyx是同一集合（3）5.0,21,46,23,1这些数组成的集合有5个数；（4）集合},,0|),{(Ryxxyyx是指第二、四象限内的点集；A.0个B.1个C.2个D.3个4．集合{(x，y)|y＝2x－1}表示()A．方程y＝2x－1B．点(x，y)C．平面直角坐标系中的所有点组成的集合D．函数y＝2x－1图象上的所有点组成的集合5．已知集合,,Sabc中的三个元素是ABC的三边长，那么ABC一定不是（）A.锐角三角形B.直角三角形C.钝角三角形D.等腰三角形6．设集合M＝{x∈R|x≤33}，a＝26，则()A．a∉MB．a∈MC．{a}∈MD．{a|a＝26}∈M7．方程组x＋y＝1x－y＝9的解集是()A．(－5,4)B．(5，－4)C．{(－5,4)}D．{(5，－4)}8．方程组20{yxyx的解构成的集合是（）A．)}1,1{(B．}1,1{C．（1，1）D．}1{9．下列集合中，不同于另外三个集合的是()A．{0}B．{y|y2＝0}C．{x|x＝0}D．{x＝0}10.由实数x，－x，x2，－3x3所组成的集合里面元素最多有________个．11．用适当的符号填空：（1）}01{2xx；（2）{1，2，3}N；在本省行政区域内从事草原保护、管理、建设和利用以及承包经营等活动，适用本条例。本条例所称草原，是指具有草原生态功能或者适用于畜牧业生产的天然草原和人工草地。天然草原包括草地、草山和草坡，人工草地包括改良草地和退耕还草地。appearanceoftheweldappearancequalitytechnicalrequirementsoftheprojectmustnothaveamoltenmetalstreamdoesnotmeltthebasemetaltoweld,weldseamandheat-affectedzonesurfacemustnothavecracks,pores,defectssuchascraterandash,surfacesmoothing,weldandbasemetalshouldbeevenlysmoothtransition.Width2-3mmfromtheedgeofweldGroove.Surfacereinforcementshouldbelessthanorequalto1+0.2timestheslopeedgewidth,andshouldnotbegreaterthan4mm.Depthofundercutshouldbelessthanorequalto0.5mm,totallengthoftheweldsonbothsidesundercutnotexceed10%oftheweldlength,andlongcontinuousshouldnotbegreaterthan100mm.Wrongsideshouldbelessthanorat0.2T,andshouldnotbegreaterthan2mm(wallthicknessmmt)incompleteornotallow7.57.5.1installationqualityprocessstandardsoftheelectricalenclosureCabinetsurfaceisclean,neat,nosignificantphenomenonofconvex,closetonature,closethedoor.7.5.2CabinetCabinetfacepaintsnopaint,returnedtorusted,consistentcolor.7.5.3uniformindirectgapfromtoptobottom,slotwidth1.5mm7.5.4adjacentCabinetsurfaceroughnessis0.7.5.5thecabinetsfirmlyfixed,craftsbeautiful.7.5.6Cabinetsurfacegauge,switchcabinetmarkclear,neat,firmpaste.7.5.7Terminalrowofneat,isreliable,theappearanceiscleanandnotdamaged.7.5.8cablesneatandclean,solidbinding,bindingprocessinappearance.7.5.9thefirstcableproductionfirm,craftsbeautiful,clearsignagedoesnotfade.7.5.10fireproofpluggingtight,nocracksandpores.7.67.6.1ofthestandardelectricalwiringqualitytechnologycablea,themulti-corewirebuncharrangementshouldbeparalleltoeachother,horizontalwireharnessorwireshouldbeperpendiculartothelongitudinalmulti-corewirebunch.Thedistancebetweenthewireharnessandwireharnesssymmetry,andascloseaspossible.B-corewiringharnessintoround,multi-corewirebunchusedgwirebinding,fastening2（3）{1}}{2xxx；（4）0}2{2xxx．12.含有三个实数的集合既可表示成}1,,{aba，又可表示成}0,,{2baa，则20042003ba.13、⑴用列举法表示下列集合：①},,20,20|),{(Zyxyxyx=②_;__________},,,|{},2,1,0{baMbabaxxPM14.用描述法表示下列集合：①所有正偶数组成的集合②被9除余2的数组成的集合15．用适当的方法表示以下集合：(1)大于10而小于20的合数所组成的集合；(2)方程组2219xyxy的解集。（3）第一、三象限内的点组成的集合。（4）直角坐标平面内X轴上的点的集合；(5)抛物线222yxx的点组成的集合；(6)使216yxx有意义的实数x的集合。16.,Rx则}2,,3{2xxx中的元素x应满足什么条件？17.已知集合043|2xaxxA（1）若A中有两个元素，求实数a的取值范围，(2)若A中至多只有一个元素，求实数a的取值范围。在本省行政区域内从事草原保护、管理、建设和利用以及承包经营等活动，适用本条例。本条例所称草原，是指具有草原生态功能或者适用于畜牧业生产的天然草原和人工草地。天然草原包括草地、草山和草坡，人工草地包括改良草地和退耕还草地。appearanceoftheweldappearancequalitytechnica