用1:250的比例画图 物体上1米长的线段应画多少? How long will you draw in a sheet of one mete
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用1:250的比例画图,物体上1米长的线段应画多少? How long will you draw in a sheet of one meter long with the scale of 1:250 ?
A.250mm
B.40mm
C.2.5mm
D.4mm

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4mm
