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Why do scientific theories change over time? Choose the best answer. A. new technologies are developed B. new discoveries are made C. new research is conducted D. all of the above
answered Mar 20, 2017
6 votes
67.2k views
Which factor aided Russian troops in defeating Napoleon’s armies and Soviet forces in defeating Hitler’s armies? (1) severe winters (2) mountain passes (3) superior air forces (4) United Nations peacekeepers
answered Aug 13, 2016
3 votes
44.0k views
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