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“比例尺”是什么?教材给出的定义是“图上距离和实际距离的比,叫做这幅图的比例尺”.比例尺是一个受条件限制的比.受哪些条件限制呢?
What is the “scale”? The teaching material is given the definition of “the distance between the map and the actual distance, called the scale of this map.” Scale is a conditional ratio.