Problem-Based Teaching operates in the problem situation and aims at solving problems through learners' teamwork.
“基于问题式教学”是把学习置于问题情境中，通过学习者的小组合作学习来解决问题。
Then main problems and obstacles in problem solving of chemical experiments are found through test.
通过测验发现学生实验问题解决过程中存在的主要问题，从中发现其思维障碍。
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