资源核验
1.已知集合A={x∈Nx≤3},B={x|-1≤x≤5},则A∩B=A.{1,2,3}B.{0,1,2}C.{0,1,2,3D.{-1,0,1,2,3}2.若复数z满足|2+1|+|z-1|=4,则||的最小值为A.1B.√2C.3D.2