YES | NO | |
(1)Epidemics were spread by crowded towns and trade.
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(2) Crop failures threatened the entire population.
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(3)Wars with invading hunter-gatherers devastated them.
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(4)Unbalanced diets contributed to malnutrition. E Hard labor damaged their bones.
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(5)Hard labor damaged their bones.
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名师1对1,深度分析薄弱项,高效提分