要一篇简单点的有关实验的英语作文

First welcome to our school lab . I am very happy to tell you what we should do before and in the experiment which we do in this lab . Before we get in the lab ,we should make some preparations . When we are in the lab ,we must follow the instruction of our teachers . And we can not touch anything without our teachers'permittion，because some chemical materials are dangerous to our skin . After having done the experiment , we are supposed to put the instrument back to the cupboard . Then we clear the room and eventually close the windows and lock the door.

亲，对我的回答满意的话，就给个好评吧。如果还有不清楚的地方，可以跟我继续交流哦。