题目

请阅读下图中六个小标题，将其与下列五位同学对此问题的陈述进行匹配，并在答题卡上将该项涂黑。选项中有一项为多余项。 44.If you feel like you haven’ t exactly defined who you are, leave your country for a period of time. There is something about having to manage yourself in a new place. There is something about having to plan ahead and search on your own. I' m sure you' ll have a better understanding of who you are and what you have to offer to the world. 45.You’ll return home with a heart to value and treasure everything around you. You在大型游乐场里，小明乘坐如图所示匀速转动的“摩天轮”，正向最高点运动．对此过程，下列说法正确的是（ ） A.小明的重力势能保持不变B.小明的动能保持不变C.小明的机械能保持不变D.小明的动能先增大后减少