——You have a beautiful voice. I love your songs.
——___________
A:No, I'm not.
B:Thank you.
C:It's OK.
D:That's all right.
已知函数y=f(x)(x∈R)的图象过点(1,0),f′(x)为函数f(x)的导函数,e为自然对数的底数,若x>0,xf′(x)>1下恒成立,则不等式f(x)≤lnx的解集为( )
下列变形中,正确的是( )