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Which of these was first used during the song dynasty (960-1279)? a) compass b) gunpowder c) paper currency d) woodblock printing
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What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.
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Which of these was first used during the song dynasty (960-1279)? a) compass b) gunpowder c) paper...
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