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裁一张长24厘米宽9厘米长方形图画纸(如图 1),把它平分成三等分折叠,在纸张两侧方块上用小刀刻开两个向外能开的纸帘(如图2),在一张纸
Cut a long 24 cm wide and 9 cm rectangular drawing paper (Figure 1), bisect it equally divided into three equal parts, the paper on both sides of the box with a knife carved two outward to open the curtain (Figure 2 ), On a piece of paper