题目

His explanation was so clear that everyone could understand it with ________. A.the least effort possibly     B.possibly the least effort C.the possible least effort             D. the least possible effort 答案：D 解析: 略 已知：．(a∈R，a为常数) (Ⅰ)若f(x)在上最大值与最小值之和为5，求a的值； (Ⅱ)在(Ⅰ)的条件下，将f(x)的图像按向量m平移后得到y＝sin2x的图像，求m．