数学教学讲究清楚明白地呈现,追求一览无余的通畅,便于学生观其形,明其里,察其实,然而,事物总是具有两面性,有时我们需要“反其道而行之”——“犹抱琵琶半遮面”地适度“遮掩”。这正如美学观点所说的那样:“曲径通幽”比一览无余更能激起人们对美好事物产生积极的情感体验,能让人们接近事物的内在本质。 Mathematic teaching stress is clearly presented, the pursuit of unobstructed unobstructed, easy for students to view its shape, clear it, observe the fact, however, things always have two sides, and sometimes we need “the opposite” “Still hold half cover” Moderate “Cover ”. This, as the aesthetic point of view puts it, is that “winding paths” can inspire people to have a positive emotional experience of beautiful things rather than glance, and allow people to approach the intrinsic essence of things.