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  3. The world’s rainforests cover less than ten percent of the earth’s surface, but contain over forty percent of all plant and anim

The world’s rainforests cover less than ten percent of the earth’s surface, but contain over forty percent of all plant and anim

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问题     The world’s rainforests cover less than ten percent of the earth’s surface, but contain over forty percent of all plant and animal species. The biggest rainforest is in South America, it’s called the Amazon.
    Amazon is by far the largest remaining rainforest area left on our planet. It’s about 6 to 7 million square kilometers. It’s about two-thirds the size of the United States including Alaska. It’s enormous. Sixty percent of it is in Brazil, but the rainforest also extends into Bolivia, Peru, Ecuador, Colombia, Venezuela, French Guiana and Suriname. And amazingly each year the Amazon provides twenty percent of the world’s fresh water. Here you can find at least 60-70 thousand plant species and at least 3 thousand species of fresh water fish. And more monkeys than you find anywhere else on earth. In Brazil alone nine new species of monkeys have been identified over the last year.
    But many of those species, known and unknown, are destroyed every day. Moreover, constant logging, mining and raising domestic animals cause a gradual disappearance of the Amazon jungles.
Over forty percent of all plant and animal species on the earth live in________.
选项 A、the seas
B、the rainforests
C、the grasslands
D、the deserts
答案B
解析 事实细节题。本题询问地球上40％以上的动植物生活在何地。首段首句提到，雨林只占地球不到10％的面积，但包括了40％以上的动植物，故B项the rainforests(雨林)正确。A项the seas(海洋)、C项the grasslands(草原)和D项the deserts(沙漠)都未在文中提及。
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