在研究瓦斯危险源辨识方法、分类分级方法的基础上分析煤矿瓦斯危险源系统结构，通过典型事故案例剖析煤矿瓦斯事故危险源系统结构。
On the basis of studying on identification, classification, gradation of gas accident hazard, the structure of coal mine gas accident is analyzed by means of typical accident.
案例教学的方法主要包括分解法、综合法、比较法、分类法和证伪法。
The methods of case teaching mainly involve the resolution method, the comprehensive method, the comparative method, the classification method and the false-proving method.
案例教学是高职餐饮服务技能课的一项重要教学方法，案例的选择和分类是搞好案例教学的前提。
Case-teaching is an important teaching method in Food and Beverage skill class. How to choose and classify them are of prime important.
案例教学是高职餐饮服务技能课的一项重要教学方法，案例的选择和分类是搞好案例教学的前提。
Case-teaching is an important teaching method in Food and Beverage skill class. How to choose and classify them are of prime important.
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