在人教版以往的教材中有许多经典习题,它们不仅可以有效地考查学生知识掌握的程度、思维水平的高低,同时题目本身还具有十分广阔的拓展空间,可以说这些习题为学生自主学习和教师教学提供了重要载体 There are many classic exercises in the teaching materials of the People’s Education Press. They can not only effectively examine the level of knowledge mastery of students, the level of thinking, but also have a very broad room for development. It can be said that these exercises are independent learning and Teacher teaching provides an important vehicle