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    【题目】“太阳大，地球小，太阳带着地球跑；地球大，月球小，地球带着月亮跑。”重温童谣，结合所学知识，回答下面小题。

    【1】童谣中涉及的天体系统层次共有

    A．一个 B．两个 C．三个 D．四个

    【2】假如人类移居月球生活，下列可能发生在月球的现象是

    ①昼夜现象 ②电闪雷鸣 ③朝霞、晚霞 ④日食、月食 ⑤行走如跳远

    A．①② B．③④ C．④⑤ D．①⑤

    【答案】

    【1】B

    【2】D

    【解析】

    试题分析：

    【1】本题考查天体系统的层次。距离相近的天体因相互吸引和相互绕转，构成不同级别的天体系统，天体系统的层次为：最高一级为总星系（即目前所知的宇宙范围），第二级为银河系和河外星系（河外星系简称星系），银河系又向下分成第三级的太阳系及其他恒星系，太阳系向下分成最低一级的地月系和其他行星系。童谣中涉及的天体系统有太阳系、地月系。所以本题选择B选项。

    【2】本题考查宇宙环境。月球表面无液态水，所以不会出现电闪雷鸣的天气现象，不会出现朝霞和晚霞；位于月球上，不能看到月食现象。月球是不透明球体，故有昼夜现象；月球质量小，引力小，所以人类在月球上行走如跳远。所以本题选择B选项。

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