题目内容

【题目】2010年元旦过后，美国科幻大片《阿凡达》在我国上映。影片讲述人类试图从极遥远的潘多拉星球（距离太阳大约4．4亿光年）开采矿产以解决地球的能源危机而与“纳美人”（潘多拉星球上的土著人类）发生一系列矛盾冲突。回答下列问题。

【1】假如影片中“潘多拉”星球在宇宙中是存在的，那么它不可能属于

A．总星系 B．银河系 C．河外星系 D．太阳系

【2】影片中地球人在“潘多拉”星球行动时需要带氧气罩，证明其大气不适合人类呼吸，适合生物呼吸的大气是地球上存在生命的重要条件之一，下列叙述与地球大气有密切关系的是

A．地球的质量与体积适中 B．地球的昼夜更替周期适中

C．地球与太阳的距离比较适中 D．地球自转周期适中

【答案】

【1】D

【2】A

【解析】

试题分析：

【1】根据天体系统的层次关系：最低一级的天体系统是地月系，较地月系高一级的天体系统是太阳系，比太阳系再高一级的天体系统为银河系和河外星系，最高一级的天体系统为总星系．潘多拉星球距离太阳约4.4亿光年，说明他不属于太阳系，银河系系主体部分的直径约为8万光年，说明它可能在银河系的范围内，它可能属于河外星系，总星系是可见宇宙，该星球属于总星系。故选D。

【2】地球的质量体积适中使得地球有合适的大气厚度和大气成分，A对。地球的昼夜更替周期适中使地球的昼夜温差适中，B错。地球与太阳的距离比较适中，使得地球有适宜生物生存的温度范围，C错。地球自转周期适中，与大气产生无关，D错。故选A。

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【题目】语法填空

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I once had the unpleasant experience of someone breaking his promise to me. Last month, everyone in my class had to gather at school 5 6:30 AM for our 6 (graduate) trip. My friend Ben asked me 7 (meet) him at McDonald’s at six, but he never showed up. I was 8 (depress) that when I called him, he told me he was already at school. I 9 (rush) straight there, but all my classmates still blamed me for delaying the trip. After that, I ended my friendship with Ben because I don’t need 10 (friend) who can’t keep their word.

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