【题目】巴西是南美洲最大的国家.完成下列各题.
【1】巴西有世界上面积最大的平原
A. 华北平原B. 亚马孙平原
C. 恒河平原D. 西西伯利亚平原
【2】巴西90%以上的人口居住在东部沿海地带,最主要的原因是该地
A. 地形平坦B. 气候适宜
C. 矿产丰富D. 水源充足
【3】亚马孙热带雨林的环境效益,最主要的是
A. 为地球大气提供20%以上的氧气
B. 为世界工业提供大量的木材资源
C. 能减少全球地表的水土流失面积
D. 是全球大气中的大部分水汽来源
【答案】
【1】B
【2】B
【3】A
【解析】
根据巴西位于南美洲东部和中部,东临大西洋,海岸线长7400多千米.面积851.5万平方千米,约占南美大陆总面积的一半;有世界上面积最大的平原亚马孙平原和最大的高原巴西高原,进行分析解答。
【1】亚马孙平原西起安第斯山东麓,东到大西洋,面积约560万平方千米,是世界上面积最大的平原,大部分在巴西境内。亚马孙平原气候终年高温多雨,为植物生长提供了得天独厚的条件,形成了世界上最大的热带雨林区。故选:B。
【2】巴西90%以上的人口居住在东部沿海地带,其中,以东南部人口最为稠密,主要原因是该地区气候温和湿润,交通运输便利。故选:B。
【3】在巴西境内,分布有世界上面积最大、环境效益巨大的自然资源是热带雨林,其主要作用是提供了良好的生态环境,维护了生物多样性,为全球提供新鲜的空气(为地球大气提供20%以上的氧气),调节全球气候等作用,被称为地球之肺。故选:A。
考查巴西的地理概况。
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