My sister has been in Shanghai for a year. However,she doesn't think she will ever________to the fast pace of life there.
A:adapt
B:adopt
C:contribute
D:add
与河外星系同一天体系统层次的是( )
已知函数f(x)=x﹣alnx,g(x)=﹣ 1+ax,(a∈R).
(Ⅰ)若a=1,求函数f(x)的极值;
(Ⅱ)设函数h(x)=f(x)﹣g(x),求函数h(x)的单调区间;
(Ⅲ)若在1,e(e=2.718…)上存在一点x0,使得f(x0)<g(x0)成立,求a的取值范围.
计算下面长方形的周长.
长25厘米,宽8厘米.
周长=____