题目

听下面一段较长对话，回答以下小题。 （1） How does the woman feel about the event? A . Surprised. B . Bored. C . Interested. （2） Why do people attend the event according to the man? A . To learn how to bargain. B . To buy fashionable items. C . To find a meaningful purchase. 答案：C C已知函数f(x)=0，(x＞0)π，(x=0)π2+1，(x＜0)，则f（f（f（-1）））的值等于（　　）A．π2-1B．π2+1C．πD．0