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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 30, 2025
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Year 8 Geography Communications Timeline
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è stato aggiornato:
9 nov 2018
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ZT
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Communications Timeline
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ZT
9 nov 2018
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453
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Smoke signals were first used in Ancient China to alert others of danger along the Great Wall.
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