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    【题目】据英国《每日邮报》报道，天文学家发现一颗绕昏暗恒星运转的类地行星，距地球仅40光年。它是一个热气腾腾的“水世界”，体积是地球的6倍。据推测，这个“水世界”同样拥有大气层，且75%的表面区域被水覆盖，但由于温度太高，它无法支持地球型生命的存在。结合材料，回答下列小题。

    【1】“水世界”类地行星所在的天体系统是

    A．地月系

    B．太阳系

    C．银河系

    D．河外星系

    【2】天文学家推测“水世界”类地行星无法支持地球型生命存在的主要依据是

    A．该行星上没有水

    B．该行星距离恒星太近

    C．该行星温度太低

    D．该行星不存在大气层

    【答案】

    【1】C

    【2】B

    【解析】

    试题分析：

    【1】由材料可知“水世界”类地行星距地球40光年，银河系直径为10万光年，因此该天体系统位于银河系，C正确。

    【2】由材料“由于温度太高，它无法支持地球型生命的存在”可知，无法支持地球型生命存在的依据是该行星距离恒星太近，B正确。

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