• 2021-04-14
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      放射性物质 A: Toxic Materials B: Corrosive Materials C: Radioactive Materials D: Magnetic Materials E: Explossives F: corrosives

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      Port of Loading and Discharge

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      From the attribute of materials, which two kinds of vernacular materials are classified ( )? A: Vernacular natural material B: Vernacular artificial materials C: Local materials D: Adaptable material E: Ecological materials