题目

．计算：(4x5－3x3＋2x2)÷2x2. 答案：.解：原式＝4x5÷2x2＋(－3x3)÷2x2＋2x2÷2x2＝2x3－x＋1.This is a _______job, I feel ______ of it.A. tired, tired B. tiring, tired C. tired, tiring D. tiring, tiring