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答题时间:30 分
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上传时间:2010-3-6
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    一、选择题(每题5分,共100分)
    1 冬季某天我国三个城市的最高气温分别是-10℃、1℃、-7℃,把它们从高到低排列正确的是
    A.-10℃、-7℃、1℃           
    B.-7℃、-10℃、1℃ 
    C.1℃、-7℃、-10℃         
    D.1℃、-10℃、-7℃


    2



    3 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    3、下列计算:①0-(-5)=-5;②(-3)+(-9)=-12;③;④(-36)÷(-9)=-4.其中正确的个数是


    A.1个            
    B.2个           
    C.3个          
    D.4个


    4 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    4、计算:的结果是


    A.5         
    B.6         
    C.7         
    D.8


    5 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    5、若-x2yn与3yx2是同类项,则的值是

    A        
    B.3         
    C.1         
    D.2



    6


    7 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    7、下列算式中,正确的是

    A    
    B     
    C    
    D


    8 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    8、下列各式中,与相等的是

    A     
    B     
    C     
    D



    9 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;} 下列多项式相乘,结果为x2-x-6的是
    A.(x-3)(x-2)        
    B.(x+3)(x-2)      
    C.(x-3)(x+2)      
    D.(x-6)(x+1)


    10 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    10、下列实数:,(每两个1之间依次多一个4),中无理数个数有


    A. 1个         
    B. 2个        
    C.3个         
    D. 4个


    11 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    11、若,则的值是


    A.0      
    B.1      
    C.-1     
    D.2009


    12


    13 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}


     



    14


    15


    16 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    16、已知,(其中x≠0,m、n为正整数),则的值等于

    A.           
    B            
    C          
    D



    17 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;} 下列四个代数式: (1) (x+y)(-x-y);  (2) (x-y)(y-x);  (3) (2a+3b)(3b-2a); (4) (2x-3y)(2y+3x). 其中能用平方差公式计算的有
    A.1个              
    B.2个             
    C.3个             
    D.4个


    18


    19 /* Generator: eWebEditor */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;font-size:10.5pt;font-family:Calibri;}div.Section1 {page:Section1;}

    19、已知xy5,xy=6,则的值是

    A        
    B       
    C          
    D



    20


     



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