题目

—The ticket said that the famous singer would come here this evening． —Yes．It’s really       to hear that． A．strange    B．sorry    C．wrong      D．surprised 答案：A已知函数的零点按从小到大的顺序排列成一个数列，则该数列的前n项的和为Sn，则S10=（ ）A．B．29-1C．45D．55