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Learning the controlled use of fire was a key development in human history that greatly improved the early humans' ability to survive. Coo food, partic meat a tubers, ma digesting nutr much eas. Fire al provided war in col climates, allo humans to expand their geographic range and survive in areas where they might not have otherwise. In addition, fire was used to harden wood for tools like spears and to shape stones for cutting and scraping, thus contributing to advances in toolmaking.
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参考答案：king ularly nd de ients ier so mth der wing