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isinc231 isinc231
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6 years ago
Smaller particles (1 mm) have an abrasive action, and larger particles (20 mm) have a polishing action.
 
  A) First statement is true, second statement is false.
  B) First statement is false, second statement is true.
  C) Both statements are true.
  D) Both statements are false.
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gool34gool34
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