对成年人而言,楼梯踏步高度以左右较为舒适,踏步宽度以左右为宜。()
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对成年人而言,楼梯踏步高度以左右较为舒适,踏步宽度以左右为宜。()
A.150mm,300mm
B.300mm,150mm,
C.200mm,300mm
D.150mm,300mm
参考答案:
对成年人而言,楼梯踏步高度以左右较为舒适,踏步宽度以左右为宜。()
A.150mm,300mm
B.300mm,150mm,
C.200mm,300mm
D.150mm,300mm
参考答案: