问题
单项选择题
无机性粉尘可分为矿物性粉尘、金属性粉尘、人工无机性粉尘。下列粉尘，属于人工无机性粉尘的是( )。
A．铁及化合物
B．石棉
C．煤尘
D．水泥
答案
参考答案：D
解析：无机性粉尘包括矿物性粉尘，如硅石、石棉、煤等；金属性粉尘，如铁、锡、铝等及其化合物；人工无机性粉尘，如水泥、金刚砂等。
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无机性粉尘可分为矿物性粉尘、金属性粉尘、人工无机性粉尘。下列粉尘，属于人工无机性粉尘的是( )。
A．铁及化合物
B．石棉
C．煤尘
D．水泥
参考答案：D
解析：无机性粉尘包括矿物性粉尘，如硅石、石棉、煤等；金属性粉尘，如铁、锡、铝等及其化合物；人工无机性粉尘，如水泥、金刚砂等。
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