课本中的例习题大都是“条件完备,结论明确”的封闭式题型,若能在教学活动中加大例习题的开放性,譬如在解完题后,对原题的条件、结论、题型作进一步的开拓思考,引伸出新问题和新的解法;或是把例习题同平时生活联系在一起改编成以应用性为主的探索题、方案设计题、阅读理解题等等,必将大大增强学生思维的发散性和创造性,更大地激发学生的学习热情,提高创 Exercises in textbooks are mostly “closed conditions”, “the conditions are complete, the conclusion is clear,” if we can increase the openness of exercises in teaching activities, such as the solution to the problem, the conditions of the original title, conclusion , Questions for further exploration and development, the extension of new problems and new solutions; or the case of daily life associated with the usual adapted into application-based exploration questions, program design questions, reading comprehension questions and so on, Will greatly enhance the divergence and creativity of students thinking, and more to stimulate students’ enthusiasm for learning, improve record