Предмет:
Английский языкАвтор:
Павел 2002Copper, lead, mercury and silver are non-ferrous substances. - Copper, lead, mercury and silver
are colored substances. Copper, lead, mercury and silver are non-ferrous metals. (Class -
colored substances; subclass - copper, lead, mercury and silver)
1. Steel alloy. 2. The five important compounds are acids, bases, salts, metal oxides,
and non-metal oxides. 3. Coal, firewood and oil can be used as fuel. 4. Inorganic salts
connections.
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