所谓开放型命题,是指命题的题设条件、解析策略或题目结论具有开放性(多元而不惟一)特点的命题。下面试举一二进行分析、探究。●难点:磁场例.试设计一种估算你家电视功率的方法。解析:打开电视将音量调至适中位置,停止家中其它用电器,然后仔细观察并记录自家使用的电度 The so-called open propositions refer to propositions of the propositions, analytical strategies, or problematic conclusions that are open (multiple but not unique) propositions. Let’s try one or two for analysis and exploration. ● Difficulty: Magnetic field. Try to design a method to estimate the power of your TV. Resolution: Turn on the TV to adjust the volume to a neutral position, stop other appliances at home, and then carefully observe and record the electricity used by your home.