已知全集U=R,A={x|2 x+1 >4},B={x|lg(x+1)<1},则集合(? U A)∩B等于( )
A.
{x|1<x<9}
B.
{x|x>9}
C.
{x|-1<x<1}
D.
{x|-1<x≤1}
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