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    【题目】关于南极洲的叙述，正确的是(　　)

    A. 南极大陆全部位于南极圈以内

    B. 是世界上跨经度最广的、纬度最高的大洲

    C. 发达国家有优先开发利用的特权

    D. 冰川的融化会导致地球气候变暖

    【答案】B

    【解析】

    本题考查了南极地区的基本概况。

    南极地区包括南极大陆及其沿海岛屿和陆缘冰，还包括南太平洋、南大西洋和南印度洋的一部分；故答案A错误。南极洲绝大部分位于南极圈以内，是七大洲中纬度位置最高、跨经度最广的大洲；故答案B正确。极地地区是研究地球环境的“天然实验室”。20世纪50年代以来，各国掀起了极地科学考察的热潮。世界各国家拥有平等开发利用的权力；故答案C错误。地球变暖的一个征兆是南北极地地区永久冰雪的快速消融。20世纪90年代以来，南极洲冰山脱离南极大陆的速度与日俱增，南极大陆冰盖的体积迅速缩小；故答案D错误。

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