—The programme is very popular.
—________. We all like it.
A:That's right
B:Not at all
C:Really?
D:You're welcome
设f(x)=-log3(x+1),x>63x-6-1,x≤6满足f(n)=-89,则f(n+4)=( )
The doctor tried his best the young man.
恩格斯说:“我们不要过分陶醉于对自然界的胜利。对于我们的每一次胜利,自然界都报复了我们。”下列人类所面临的诸多问题中能佐证这一观点的是( )