【題目】假設(shè)我們的教室長(zhǎng)9米、寬7米。如果要繪制教室平面圖（繪圖紙的大小為20厘米×30厘米），你認(rèn)為選用下列哪個(gè)比例尺最為合適（ ）

A.1：25B.1:40C.1:100D.1:1000

【答案】B

【解析】

A．1:25的比例尺1厘米代表實(shí)地距離25厘米，繪制的教室平面圖長(zhǎng)、寬分別是36厘米、28厘米，不合適，故A錯(cuò)誤；

B．1:40的比例尺1厘米代表實(shí)地距離0.4米，繪制的教室平面圖長(zhǎng)、寬分別是22.5厘米、17.5厘米，合適，故B正確；

C．1:100的比例尺1厘米代表實(shí)地距離1米，繪制的教室平面圖長(zhǎng)、寬分別是9厘米、7厘米，不合適，故C錯(cuò)誤；

D．1:1000的比例尺1厘米代表實(shí)地距離10米，繪制的教室平面圖長(zhǎng)、寬分別是0.9厘米、0.7厘米，不合適，故D錯(cuò)誤；故選B。

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