论文部分内容阅读
众所周知,数学以逻辑严谨著称,因此培养学生用“环环相扣、滴水不漏”的思维链条来解决问题绝对是数学教学的“主旋律”.但笔者从一次教学中发现,有一类“选择题”由于本身具有较大的思维难度,再加上学生的“功利思想”以及方法选择上的片面性,在考查中所起的效果却是与以上特点背道而驰的.笔者就此进行了粗浅的调查与分析,现阐述如下.一、教学片断师:下面请思考以下问题:已知二面角α-l-β的大小为50°,P为空间中任意一点,则过点P且与平面α和平面β所成的角都是
As we all know, mathematics is known for its rigorous logic, so to train students to solve the problem with “interlocking, drip ” thinking chain is definitely the “melody ”, but the author found from a teaching, there is a class of “Multiple choice questions” because of their own greater difficulty of thinking, coupled with the students “utilitarian thought ” and the methodological aspects of the one-sidedness, the effect in the test is contrary to the above characteristics.I author of this A superficial investigation and analysis, are described as follows: First, the teaching of film division: Now consider the following questions: known dihedral angle α-l-β size of 50 °, P is any point in space, the point P And the angle formed by both plane α and plane β is