单项选择题
幼儿园、小学楼梯的楼梯台阶踏步的宽度和高度的最小值为:()
A.0.28m;0.15m
B.0.26m;0.14m
C.0.30m;0.14m
D.0.26m;0.16m
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单项选择题
A.0.28m;0.15m
B.0.26m;0.14m
C.0.30m;0.14m
D.0.26m;0.16m
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