题目

设ω>0，函数y＝sin(ωx＋)＋2的图象向右平移个单位后与原图象重合，则ω的最小值是________． 答案：  —What are you going to do tomorrow?—We’ll go to the West Hill for a picnic ________ it rains.A. UnlessB. ifC. until Dor