(-12)2011×22011
=( -12×2) 2011
=（-1）2011
=-1．
故选C．
若存在实常数k和b，使函数f（x）和g（x）对其定义域上的任意实数x恒有：f（x）≥kx+b和g（x）≤kx+b，则称直线l：y=kx+b为f（x）和g（x）的“隔离直线”．已知h（x）=x2，φ（x）=2elnx，则可推知h（x），φ（x）的“隔离直线”方程为______．
(2014·皖南八校联考)________ Yao Ming has retired from the NBA，the pleasure we have got by watching him play basketball at home and abroad will last long.
A．Although
B．If
C．Since
D．Once
