弄清模糊的历史知识固原县三营一中杨茂福在中学历史教科书上，自很多相应的历史地图。在这些地图当中，有些隐形的知识容易被教师忽视或根本引不起注意。学生往往因此形成模糊的概念，影响学生正确理解历史知识。现举几例，供广大师生在教与学中参考。例一，《世界近代现... Find out the vague historical knowledge Yang Maofu of Sanying No. 1 Middle School in Guyuan County has a lot of historical maps in the middle school history textbooks. In these maps, some invisible knowledge is easily overlooked by teachers or simply cannot be noticed. Students often form a vague concept, affecting students to correctly understand historical knowledge. Here are a few examples for reference by teachers and students in teaching and learning. Example 1, "The modern world is...