1.已知集合A={0,1,2,3,4,5),B={xgx≤},则A∩B=2A.{1,2}B{1,2,3C.{0,1,2,3}D.{0,1,2,3,4,5112.函数y=√-x6x+的定义域为)0[-÷,1B.[-1,3C.(-∞,-]u[1,+∞)(,+∞)