某探究学习小组欲探究物体的加速度与力、质量的关系，他们在实验室组装了一套如图1所示的装置，图中小车的质量用M表示，钩码的质量用m表示．要顺利完成该实验，则：

短文改错。

例： Jim get up at seven in the morning.         gets

    I live in the country and my father was ____ a farmer. He is now forty—five year ____ old. Because of years of hard work, he looks old ____ than his age.When I was young, he use ____  to tell me the importance of study. Father knows little about English and other subject____ . But he usually gives me some good advices ____ on how To learn my lessons good____. He is not only kind to me But also very strict with me. With the____  help, I've made great progress. I'll never forgot ____ what he taught me. I think my father is a ____ best father in the world.

一般植物生长需要量最多的无机盐不包括（　　）

抛物线 $y=-x^2+2x-2$ 经过平移得到 $y=-x^2$ ，平移方法是（　　）