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ID:30200460
大小:4.64 MB
页数:109页
时间:2018-12-27
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1、1991-2011年全国初中数学联赛试题总汇1991年全国初中数学联合竞赛决赛试题第一试一、选择题本题共有8个小题,每小题都给出了(A)、(B)(C)、(D)四个答案结论,其中只有一个是正确的.请把正确结论的代表字母写在题后的圆括号内.1.设等式在实数范围内成立,其中a,x,y是两两不同的实数,则的值是(A)3;(B);(C)2;(D).答()2.如图,AB‖EF‖CD,已知AB=20,CD=80,BC=100,那么EF的值是(A)10;(B)12;(C)16;(D)18.答()3.方程的解是(A);(B);(C)或;(D).答()4.已知:(n是
2、自然数).那么,的值是(A); (B);(C); (D).答( )5.若,其中M为自然数,n为使得等式成立的最大的自然数,则M(A)能被2整除,但不能被3整除;(B)能被3整除,但不能被2整除;(C)能被4整除,但不能被3整除;(D)不能被3整除,也不能被2整除.答( )standardsandspecifications,serialnumbera1GB3323-2005steelfusionweldedbuttjoints,weldingengineering-Raylightingandqualityratingo
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5、lationengineering1GB150-982GB50128-2005verticalcylindricalsteelpressurevesselsteelweldedtankcodeforconstructionandacceptanceof3JB/T4735-1997steelweldedatmosphericpressurevessel4GB50231-2009mechanicalequipmentinstallationengineeringconstructionandacceptancespecificationfor5GB50
6、275-98compressor,fanandpumpinstallationengineeringconstructionandacceptancespecificationforlifting6HG20201-2000constructioninstallationengineeringconstructionstandard7,HG...Pressuregauges,usinganinstalledsparkarrestorforacetylenecylinders,illegalcarrying,usinggascylinders,each
7、operatorfined20Yuan.Gasbottlewithoutthehotsunexposuremeasures,responsibilitiesofteamafineof50Yuan.(7)atheightandtheopeningandprovisionalprotectivemeasureshavebeentaken,theresponsibleunitfined200Yuan,constructionpersoninchargeafineof50Yuan.(8)nopermittoworkandthejobinaccordance
8、withtheprovisions,onthejobunitfined300yuan,theunitwillcharge1
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