manou76
manou76
30.09.2019 • 
Biology

Which of the following statements is true?

the mineral ores for gold and silver are commonly found in the earth's crust.

the mineral ores for gold and silver are rarely found in the earth's crust.

the mineral ores for gold and silver can be easily manufactured artificially.

the mineral ores for gold and silver are commonly found in the oceans

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