Chemical class is the compulsory course in the middle school.It is

one of my favorable classes.When I first contact with this subject,I am

interested in it.In my mind,it is miracle.It can see the nature of

object.For example,through chemical class,I learn how does water

form.Knowing this makes me feel like a little talent.I have a great

sense of achievement.Maybe it is my curiosity makes me like this class

so much.To be honest,to explore knowledge is very excited and

interesting.