Quais sao os tipos de carvao?
A)carvao preto e carvao de lenha
b)carvao mineral e carvao artificial.
A)carvao preto e carvao de lenha
b)carvao mineral e carvao artificial.
Quais sao os tipos de carvao?
A)carvao preto e carvao de lenha
b)carvao mineral e carvao artificial.
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