习题课的教学作用:一是巩固概念、规律,反馈信息,了解教学效果;二是深化、活化知识,培养思维品质,提高应用能力;三是训练科学表达能力和严谨的逻辑思维能力。习题课中的研究,侧重于发散思维、聚合思维;对比总结、联想迁移、活化知识。精选例题,(体现基础知识应用、基本方法训练 The role of exercises in teaching: First, to consolidate the concept, the law, feedback information, understand the effectiveness of teaching; Second, to deepen, activate knowledge, develop thinking quality, improve the application ability; Third, training scientific expression ability and rigorous logical thinking ability. The study in the exercises class focuses on divergent thinking and convergent thinking; contrasting summarization, association migration, and activating knowledge. Selected examples, (embodies the application of basic knowledge, basic method training