简述培训的类型
参考答案:按照培训的目的分类:晋职培、入职培训和在职培训
按照培训的载体分类:传统培训方式和电子培训方式
按照师生间的关系分类:单向讲授和师生互动
—John has hurt his leg.
—Really? ______? [ ]
A. Who did that
B. How did that happen
C. What's wrong with him
D. Why was he so careless
什么叫控制网的优化设计?它分为哪几类?各类要解决的主要问题是什么?