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板书是教学中最基本、最常见的辅助手段,相对于其他教学手段所传递信息的短暂性,板书能多次长时间的向学生传递信息,对教学内容
Writing a book is the most basic and most common aid in teaching. Compared with the short-term information conveyed by other teaching methods, the writing of a book can transmit information to students for many times,