单项选择题
天然石材的最小规格为（）。
A.80mm x 60mm x 15mm
B.100mrn x 90mm x 15mm
C.200mm x 120mm x 15mm
D.300mm x 150mm x 15mm
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单项选择题
A.80mm x 60mm x 15mm
B.100mrn x 90mm x 15mm
C.200mm x 120mm x 15mm
D.300mm x 150mm x 15mm
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