Excuse me, ______ do you say that in Chinese? [ ]
A. what
B. how
C. when
D. who
答案:B
已知函数f(x)=x2+ax+blnx(x>0,实数a,b为常数).
(Ⅰ)若a=1,b=-1,求f(x)在x=1处的切线方程;
(Ⅱ)若a=-2-b,讨论函数f(x)的单调性.
循环流化床锅炉的主要优点是什么?