合理膳食是指( )
填上与左图相对应的英文代表字母。
①多少个苹果?____ A. Here you are.
②谢谢。 ____ B. How many apples?
③给你。____ C. Thank you.
设函数f(x)=|x﹣2|+|x﹣a|,x∈R.
(Ⅰ)求证:当a=﹣1时,不等式lnf(x)>1成立;
(Ⅱ)关于x的不等式f(x)≥a在R上恒成立,求实数a的最大值.
—___________ is it from your home to school?
—Ten minutes on foot.