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【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;

D1:1000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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