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【单选题】
某粗集料经筛分试验，53mm、37.5mm筛上的通过量均为100%，31.5mm筛上的筛余量为15%，则该粗集料的最大粒径和最大粒径分别为( )。A.
37.5mm、37.5mm
B.
53mm、31.5mm
C.
37.5mm、31.5mm
D.
31.5mm、31.5mm
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