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在现实中,教学资源无处不在,操场上的跑道线(直道线)就是很好的教学资源。笔者通过教学实践,发现跑道线不仅具有传统的
In reality, teaching resources are ubiquitous. The playground runway (straight line) is a good teaching resource. The author through teaching practice, found that the runway line not only has the traditional