[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 题目和参考答案——青夏教育精英家教网—

题目内容

【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】

【1】D

【2】A

【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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