【題目】巴西是南美洲最大的國家.完成下列各題.

1巴西有世界上面積最大的平原

A. 華北平原B. 亞馬孫平原

C. 恒河平原D. 西西伯利亞平原

2巴西90%以上的人口居住在東部沿海地帶,最主要的原因是該地

A. 地形平坦B. 氣候適宜

C. 礦產(chǎn)豐富D. 水源充足

3亞馬孫熱帶雨林的環(huán)境效益,最主要的是

A. 為地球大氣提供20%以上的氧氣

B. 為世界工業(yè)提供大量的木材資源

C. 能減少全球地表的水土流失面積

D. 是全球大氣中的大部分水汽來源

【答案】

1B

2B

3A

【解析】

根據(jù)巴西位于南美洲東部和中部,東臨大西洋,海岸線長7400多千米.面積851.5萬平方千米,約占南美大陸總面積的一半;有世界上面積最大的平原亞馬孫平原和最大的高原巴西高原,進行分析解答。

1亞馬孫平原西起安第斯山東麓,東到大西洋,面積約560萬平方千米,是世界上面積最大的平原,大部分在巴西境內(nèi)。亞馬孫平原氣候終年高溫多雨,為植物生長提供了得天獨厚的條件,形成了世界上最大的熱帶雨林區(qū)。故選:B。

2巴西90%以上的人口居住在東部沿海地帶,其中,以東南部人口最為稠密,主要原因是該地區(qū)氣候溫和濕潤,交通運輸便利。故選:B。

3在巴西境內(nèi),分布有世界上面積最大、環(huán)境效益巨大的自然資源是熱帶雨林,其主要作用是提供了良好的生態(tài)環(huán)境,維護了生物多樣性,為全球提供新鮮的空氣(為地球大氣提供20%以上的氧氣),調(diào)節(jié)全球氣候等作用,被稱為地球之肺。故選:A。

考查巴西的地理概況。

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