The cost question has naturally become one of the key issues in the economics study as well as the major problem focused on by economists in real world.
因此，成本问题就理所当然的成为经济学研究的最重要的问题之一，现实世界中也一直是经济学家研究的主要问题。
Question 3 conveys behavioral coping, also called "problem-focused."
问题3传达的是行为应对，也称“问题焦点”。
Method the teaching method of problem-focused case discussion was used in the process of training before on duty, and the effectiveness was evaluated through examination of ability.
方法在岗前培训中采取案例问题式教学，通过能力题考试进行学习效果评价。
Method the teaching method of problem-focused case discussion was used in the process of training before on duty, and the effectiveness was evaluated through examination of ability.
方法在岗前培训中采取案例问题式教学，通过能力题考试进行学习效果评价。
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