大科学家牛顿曾经说过:“没有大胆的猜想,就做不出伟大的发现。”“大胆地跳跃到某种结论上”(卡尔·波普尔),就是猜想。在教学中我们可以将课本上封闭型的例、习题改造成开放型的问题,为学生提供猜想的机会,创造条件让他们进行猜想。在猜想中,进一步培养和发展学生的 The great scientist Newton once said: “Without daring conjectures, we cannot make great discoveries.” “Barely jumping to some sort of conclusion” (Karl Popper) is guessing. In teaching, we can transform closed textbooks and exercises into open-ended questions, provide students with opportunities for conjecture, and create conditions for them to conjecture. In the conjecture, further training and development of students