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AreebJ AreebJ
wrote...
Posts: 732
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6 years ago
Black smokers are rich in ________, while white smokers have high levels of ________.
 
  a. iron sulfide; copper sulfide
 b. copper sulfide; zinc sulfide
 c. zinc sulfide; copper sulfide
 d. copper sulfide; iron sulfide
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wrote...
6 years ago
b
AreebJ Author
wrote...
6 years ago
Just confirmed the same answer from my friend, thanks
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