Ответ:
3
Natural : metal, stone, gravel, wood, sand, iron
Artificial : brick, concrete, timber
4
Advantageous : fire-resistantce, low cost, durability, hardness, high strength, corrosion-resistance
Disadvantageous : high cost, low resistance, high weight, heavy weight, non-fire-resistance, softness
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Answers & Comments
Ответ:
3
Natural : metal, stone, gravel, wood, sand, iron
Artificial : brick, concrete, timber
4
Advantageous : fire-resistantce, low cost, durability, hardness, high strength, corrosion-resistance
Disadvantageous : high cost, low resistance, high weight, heavy weight, non-fire-resistance, softness