Train abstract sumarizing ability,so that the proper idea can be drawn;Train scattering thinking ability,so that the debatable trend can be wide;Train gathering thinking ability,so that the best way can be made to decide branch thesis;Train dialectial thinking ability as well as deformed and ordinal thinking ability to advance the depth of arqumentation.

Firstly,under the assumptions of same type of system components,this paper analyzes Markov model using the maintenance sequence as a breakthrough point,and proves that for certain maintenance sequences,the single state probability can be calculated according to the class state probability.

Base on the practical process of chemistry teaching in Middle School,from two porints,this article deals with how to help the students to think in orders and learn organic chemistry well.