解:
∵解不等式①得:x≤2,
解不等式②得:x>﹣3,
∴不等式组的解集为﹣3<x≤2.
以初速度v0水平抛出一个物体,经过时间t速度的大小为vt,经过时间2t,速度大小的正确表达式应该是( )
Christmas is my favourite 1. On Christmas, my family 2 my aunt,uncle and cousin to our house. We 3 gifts to each other. I give my cousin a 4 gift. We sing the Christmas 5 together. I think we are very happy.
持____ 炮____ 担____
挂____ 跑____ 坦____
_______ that the scientist will give us a talk next month?