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={x∈Z.|-1≤x≤2},集合 ={0,2,4},则A.∩B.=( ) A. {0,2} B. {0,2,4} {-1,0,2,4} {-1,0,1,2,4}
={x∈Z|﹣1<x≤3},集合 ={1,2},则集合A.∩(∁R.B.)=( ) A.{0,3}B.{﹣1,0,1,2,3} {﹣1,0,3} {﹣1,0}
{x|x=0} {a|a2=0} {a=0} {0}
={(x,y)|x+2y﹣4=0},集合 ={(x,y)|x=0},则A.∩B.=( ) A.{0,2}B.{(0,2)} (0,2) ∅
到集合 的映射,若A.={-2,0,2},则A.∩B.=( ) A.{0}B.{2} {0,2} {-2,0}
{x│0≤x<1} {x│0≤x<2} {x│0≤x≤1} {x│0≤x≤2}
={x∈Z. | x2+x-2<0},则集合A.的一个真子集为 A.{x | -2<x<0} {x | 0<x<2} {0} {Ø}
{x | x > 0} {x | x > 2} {x | x < - 2或x > 0} {x | x < - 2或x > 2}
{0,1} {﹣1,0,1} {0,1,2} {﹣1,0,1,2}
={0,1,2},集合 ={x|x=2m,m∈N},则A.∩B=( ) A.{0}B.{0,2} {0,4} {0,2,4}
={1,2,3,4},集合,集合,则集合C.的真子集的个数为( ) A. 1 2 3 4