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how do we know the olmecs were technologically advanced? a. they created the first version of a calendar. b. they invented tools using stones and metal. c. they used latex from trees to create rubber.
answered Jan 17, 2017
3 votes
32.8k views
Metacognition is planning about planning. predicting about predicting. learning about learning. knowing without knowing
answered Aug 17, 2015
2 votes
229k views
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