1.若集合A=(1,2,3,4,5),B={x|nx>0},则A∩B=A.(3,4,5B.(2,3,4,5C.{35D.{1,2,3,4,52.已知p:Vx∈(0,+∞),x-log:x≥0,则pA.x∈(0,+∞),x-log:x<0B.x∈(0,+∞),x-log:x≤0C.3x∈(-∞,0],x-logx≤0D.3x∈(0,+∞),x-log2x<03.化简:ABCB+CD-ED-AE=A.0 B.AB C. BA D. CA12m7ein33in27°