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复合树脂中填料的主要作用为赋予材料良好的物理性能，使压缩强度、硬度和耐磨性有显著性提高。填料假如量影响其强度的表现为A、加入量多强度高 B、加入量多强度低 C、加入量少强度高 D、粒度分布窄强度高 E、粒度分布宽强度低 填料加入量受粒度大小的影响表现为A、粒度越细加入量越少 B、粒度越细加入量越多 C、表面积大加入量多 D、表面积小加入量少 E、粒度细，表面积大加入量多
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