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Author Question: Rare-earth elements are called that because they are very rare. Indicate whether the statement is ... (Read 47 times)

APUS57

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on: Jul 15, 2018
Rare-earth elements are called that because they are very rare. Indicate whether the statement is true or false.

Question 2

Due to the long history of environmental damage from acid-mine drainage, present-day mines can no
  longer be developed in a sulfide ore body. Indicate whether the statement is true or false.



kkenney

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Reply #1 on: Jul 15, 2018
Answer to Question 1

T

Answer to Question 2

F


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APUS57

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Reply #2 on: Jul 15, 2018
Correct answers!


kkenney

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Reply #3 on: Jul 15, 2018
Great! Please up vote :D


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