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本刊2002年第4期《对一道初中物理竞赛题的再议》一文(以下简称《再》文)中提供了解决1999年全国初中物理竞赛(复赛)第4题的一种方法。其实,换个角度认识这道试题将更有助于学生的理解与运用。 《再》文作者从不准确温度计1℃代表的实际温度值推导得出(2)式并应用(2)式求得:t_实=25.16℃和t_实=42℃的结果。笔者认为:《再》文中有几处欠妥:
The article “Reconsideration of a junior high school physics contest title” (hereinafter referred to as “RE” article) in the 4th issue of the magazine provides a method for solving the fourth problem of the 1999 national junior high school physics competition (rematch). In fact, understanding this question from a different perspective will help students understand and use it more. The author of the “Re” writer derives the formula (2) from the actual temperature value represented by the inaccurate thermometer 1°C and applies the formula (2) to obtain the results: t_real=25.16°C and t_real=42°C. The author believes that there are several defects in the re-text: