题目内容：
换填的砂和砂砾石垫层，其砂和砂砾石中的含泥量均应小于（ ）。
A．5% B．8%
C．10%
D．12%
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答案解析：
单选题：换填的砂和砂砾石垫层，其砂和砂砾石中的含泥量均应小于（ ）。
- 题目分类：矿业工程
- 题目类型：单选题
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B．8%
C．10%
D．12%
B．8%
C．10%
D．12%
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