1.已知集合A={x|y=x+1},B={yly=x2+1},则集合A∩B=A.{0,1B.{(0,1),(1,2)C.{1,2}D.[1,+∞)2.已知复数z满足z·(1-i)=-4(i为虚数单位),则|z|=A2B.2C.22D.43.已知数列{an}对任意的m,n∈N·,满足an+nam+an,且a4=6,则a3=A15B.7.17D.174.若sin(+a)=-,且a不是第二象限角,则tana=A12B.1C-512D-125