The cost of Yaocheng is more for the working people, and it is deeper and more difficult to use drawings. Every major has a teacher to take the whole course, paying more attention to the difficulties in practical work, and it is very practical, more like an old master imparting work experience. Advantages: There are more dry goods.

② Cost of firewood and gas

Chai Qi's cost, once a cost teacher, is famous in school. Teacher Chai talked about the theoretical part, giving lectures with full confidence and loud voice. The software is brought by other teachers, and the theory is better and more car-scrapping! Advantages: Good reputation.