题目内容

【题目】南极大陆是一个冰雪世界，关于南极地区的叙述，正确的是( )。
A.为世界上最干燥的大陆
B.我国南极三大科考站都有极昼极夜现象
C.常住居民为黄色人种印第安人
D.距离南极洲最近的大洲为南美洲

【答案】A,D
【解析】南极洲的年平均降水量仅为55毫米，是地球上降水最少的大陆，而且降水几乎全部是雪．极地酷寒，多狂风，降水稀少．夏季出现极昼时，太阳总在地平线上，但太阳高度小，阳光娇弱无力，根本无法驱散冰原上的寒气。我国在南极的建立的三个科学考察站中，长城站在南极圈以外，没有极昼极夜现象；在北极圈内，长期居住的人口已接近300万．当地的土著居民主要是因纽特人和拉普人．南极洲则没有国家和定居人口；距离南极洲最近的大洲是南美洲。根据题意，故选：A、D．

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