“疑”是思维的开端,是创造的基础,教会学生质疑问难,是调动学生学习积极性的重要手段,也是培养学生学习能力的有效途径。一个有价值的问题,就像在平静湖面上投入一粒石子,掀起学生思维的波澜,叩开学生想象的大门,鼓起学生探索的风帆。所以,教师应力求培养学生质疑问难的能力,使学生积极主动地参与新知的学习。一使学生勇于质疑问难学生对于刚刚获得的知识,往往会产生这样或那样的问题,但有些学生尽管心中存疑,也不敢当堂直述疑问,一怕 “Doubt ” is the beginning of thinking, is the foundation of creation, and it is an important means to mobilize the enthusiasm of students to learn. It is also an effective way to train students’ learning ability. A valuable question is like putting a stone on a calm lake, setting off waves of student thinking, knocking on the door of a student’s imagination and encouraging students to explore the sails. Therefore, teachers should strive to cultivate students’ ability to question and answer questions so that students actively participate in the learning of new knowledge. First, the students brave to question the hard-won students For the newly acquired knowledge, often have one or the same problem, but some students despite the hearts of doubt, do not dare to be honest, a fear