以“My future”为题，写一篇不少于五句话的短文。
My future
I want to be a teacher in my future. I like to teach English and music. I can speak English with my students in class. After class, we can sing songs together. What do you want to be?
物体m从倾角为α的固定的光滑斜面由静止开始下滑，斜面高为h，当物体滑至斜面底端时，重力做功的功率为（ ）
给加横线字注音
咆哮____ 沙丘____ 辽阔____
下列关于物质分类合理的是 （ ）
