题目

What did you have ________ dinner? ( )A.of B.to C.for 答案：【答案】C【解析】句意：你晚饭吃的什么？What did you have for dinner?介词for的固定用法。故选C。 用秦九韶算法计算多项式在时的值时,的值为(    ) A. －845             B. 220               C. －57            D. 34