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    【题目】人口和资源问题能从侧面反映当时社会发展的状况。下表为我国1750-1850年人口和耕地面积相关数据表。读表，完成下列各题。

    年份

    人口（亿）

    耕地（亿公顷）

    人均耕地（公顷/人）

    1750

    2—2．5

    0.6

    0.3-0.24

    1850

    4.1

    0.81

    0.2

    【1】这一时期我国耕地面积总数增加了，人均耕地面积却减少了，其主要原因是（ ）

    A. 土地兼并严重 B. 人口剧增 C. 自然灾害频繁 D. 战乱频发

    【2】表中人口与耕地之间的变化说明一个国家要持续发展（ ）

    A. 只有不断扩大耕地面积 B. 必须保持安定统一的国内环境

    C. 必须处理好人口与自然资源的关系 D. 只有发展人口、增加劳动力

    【答案】

    【1】B

    【2】C

    【解析】

    【1】人均耕地的面积=耕地总面积÷人口数量，读图分析可知，从1750-1850年我国耕地面积总数增加由0.6增加到了0.81，同时人口数量从2亿左右增加到了4.1亿，人口增加幅度大大高于耕地的增加速度，因此导致人均耕地面积是减少的，故答案选B项。

    【2】由上题现象说明，一个国家要持续发展，必须处理好人口、自然资源的关系，要求以环境与自然资源为基础，同环境承载能力相协调。故答案选C项。

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