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    精英家教网 > 高中地理 > 题目详情

    【题目】与地球上存在生命无关的因素是 （ ）

    A．地球的体积和质量适中

    B．地球附近大小行星各行其道，互不干扰

    C．日地距离适中，地表温度适宜

    D．月球是地球的卫星

    【答案】D

    【解析】

    试题分析：考查地球上存在生命的条件。地球上存在生命与地球处在安全的宇宙环境，地球本身有适宜的温度、大气、液态水有关。D项正确。故选D。

    地球上存在生命的条件

    形成生命条件的原因

    外部

    条件

    太阳光照稳定

    太阳从诞生至今没有明显的变化

    运行轨道安全

    地球附近的大、小行星各行其道、互不干扰

    自身条件

    有适宜的温度

    日地距离适中，自转周期不长不短，使地球平均气温为15℃

    有适合生物呼吸的大气

    地球的体积和质量适中，吸引气体形成大气层，并经过漫长的演化形成以氮和氧为主的大气

    有液态水

    地球内部放射性元素衰变和原始地球体积收缩，产生热量，不断产生水汽，并随地球内部的物质运动带到地表，形成原始海洋

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