单项选择题
水工建筑物中的板厚不宜小于100mm,板厚在250mm以下按()的模数递增,板厚在250mm以下按()的模数递增,板厚超过800mm时则以()的模数递增。
A.50mm,100mm,200mm
B.50mm,100mm,150mm
C.10mm,50mm,100mm
D.10mm,20mm,50mm
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单项选择题
A.50mm,100mm,200mm
B.50mm,100mm,150mm
C.10mm,50mm,100mm
D.10mm,20mm,50mm
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