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现在中考题目越来越趋向于开放性。以考查学生的发散思维和全面分析问题的能力。下面我们举一例简要说明。例在一根充满水的铁管子一端敲击一下。在另一端的人贴近水管能听到几次声音(声音在钢铁中传播速度V船=5200米/秒,在水中传播速度V水=1500米/秒)。分析刚拿到这个题目,大部分同学都把它当成一个简单的问答题来回答了,有的答1次、有的答2次、有的想全面点的答3次。究竟能听到几次声音,要通过定量的分析才能知道。我们知
The subject of the examination now tends to be more open. To examine students’ divergent thinking and ability to analyze problems comprehensively. Below we give a brief explanation. For example, tap on one end of a water-filled iron pipe. The person at the other end can hear several sounds in close proximity to the water pipe (voice travels in steel V boat = 5200 m/s, speed in water V water = 1500 m/s). The analysis just got this topic, most of the students have answered it as a simple question and answer, and some answer 1 times, some answer 2 times, and some want to fully answer 3 times. How many sounds can you hear? It must be known through quantitative analysis. We know