A.粉尘的化学组成B.粉尘的比重、形状及硬度C.粉尘的分散度D.粉尘的溶解E.粉尘的电荷性与粉尘在呼吸道阻留的部位有密切关系的是

作者: rantiku 人气: - 评论: 0
问题 A.粉尘的化学组成 B.粉尘的比重、形状及硬度 C.粉尘的分散度 D.粉尘的溶解 E.粉尘的电荷性 与粉尘在呼吸道阻留的部位有密切关系的是
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答案 C
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