题目

To be great, you must be smart, confident, and, _______,honest. A. therefore    B. above all C. however      D. after all 答案:B定义在R上的函数f(x),对任意的x都有f(x+4)≤f(x)+4和f(x+3)≥f(x)+3,且f(1)=2,f(0)=1,则f(2009)=20102010.
英语 试题推荐