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Chinese historical cotton industry
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Chinese historical cotton industry
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理学
中国历史时期植棉业
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Chinese historical cotton industry
中国历史时期植棉业
中国历史上的棉种植业发展、演变情况。中国历史时期植棉业经历了从南向北的传播历程,传播中也将棉种从木棉、树棉变更为草棉,最后完成了美洲陆地棉对各地棉种的全面替换。
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basic design methods of classical control theory
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Basic Ecological Control Line in Shenzhen
basic economic law of capitalism
basic economic law of socialism
basic economic system of the primary stage of socialism
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basic education entrance examination
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basic element of intelligence
basic elements of manufacturing process dynamic operation
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