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Pregunta
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Respuesta correcta
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Depending on their origin, plastics can be: :
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Synthetic or Natural |
Which of these types is not a plastic? :
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Plaster |
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Pregunta
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Respuesta correcta
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the permanent joins can be... :
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adhesive and soldering |
which of these properties doesnt have the plastics? :
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electrical conductivity |
How we can make ceramics? :
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clay |
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