题目内容

【题目】假设我们的教室长9米、宽7米。如果要绘制教室平面图（绘图纸的大小为20厘米×30厘米），你认为选用下列哪个比例尺最为合适（ ）

A.1：25B.1:40C.1:100D.1:1000

【答案】B

【解析】

A．1:25的比例尺1厘米代表实地距离25厘米，绘制的教室平面图长、宽分别是36厘米、28厘米，不合适，故A错误；

B．1:40的比例尺1厘米代表实地距离0.4米，绘制的教室平面图长、宽分别是22.5厘米、17.5厘米，合适，故B正确；

C．1:100的比例尺1厘米代表实地距离1米，绘制的教室平面图长、宽分别是9厘米、7厘米，不合适，故C错误；

D．1:1000的比例尺1厘米代表实地距离10米，绘制的教室平面图长、宽分别是0.9厘米、0.7厘米，不合适，故D错误；故选B。

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