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【题目】 热带雨林是地球上重要的原始森林,它对人类的生存与发展有着重要的意义,有“地球之肺”的美誉。据此完成下面小题。

1世界上面积最大的热带雨林分布在( )

A.美国B.中国C.埃及D.巴西

2热带雨林的作用有( )

①调节大气成分②保持水土

③维护生物多样性④大气增温

A.①②③B.①②④C.①③④D.②③④

【答案】

1D

2A

【解析】

巴西是南美洲最大的国家,巴西北部的亚马孙平原覆盖着地球上最大的热带雨林;亚马孙平原覆盖着地球上最大的热带雨林。热带雨林有巨大的环境效益,热带雨林的作用有提供木材、调节全球气候、为全球提供新鲜空气、涵养水源,保护淡水资源、保护土壤,防止水土流失、提供良好的生态环境、维护生物多样性等。

1

世界上面积最大的热带雨林分布在巴西北部的亚马孙平原地区,热带雨林具有巨大的生态效益和环境效益。故选D。

2

热带雨林有“地球之肺”之称,其作用是:调节大气成分、保持水土、维护生物多样性等;热带雨林破坏后会造成大气增温。故选A。

本题考查巴西热带雨林有关知识。

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