题目

She has _______ this car for nearly ten years. A.buy                 B.bought              C.have                 D.had 答案：D已知函数f(x)＝x3＋ax2＋bx＋c，且0＜f(－1)＝f(－2)＝f(－3)≤3，则( )A.c≤3B.3＜c≤6C.6＜c≤9D.c＞9