A:蜗居网瘾一柱香形色可疑
B:惊蛰洗涮放冷剑白头偕老
C:诀别煤炭下马威好高务远
D:娇嗔松弛捋虎须报仇血恨
——Be quiet! Mr Smith is coming.——Don't worry. It__________be him. Mr Smith is much taller.
商朝时的国家“档案”用什么文字书写( )
(Ⅰ)若a=b=1,求函数f(x)的单调区间;
(Ⅱ)若a=0,且当x≥0时,f(x)≥1总成立,求实数b的取值范围;
(Ⅲ)若a>0,b=0,若f(x)存在两个极值点x1,x2,求证;f(x1)+f(x2)<e.