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    One reaction to all the concern about tropical deforestation（毁林） is a blank stare that asks the question, "Since I don't live there, what does it have to do with me?"
    The answer is that your way of life, wherever you live in the world, is tied to the tropics in many ways. If you live in a house, wash your hair, eat fruits and vegetables, drink soda, or drive a car, you can be certain that you are affected by the loss of tropical forests.
    Biologically, we are losing the richest regions on earth when, each minute, a piece of tropical forest, the size of ten city blocks, disappears. As many as five million species of plants, animals, and insects (40 to 50 percent of all living things) live there, and are being lost faster than they can be found and described. Their loss is immeasurable.
    Take rubber for example. For many uses, only natural rubber from trees will do. Synthetics are not good enough. Today over half the world's commercial rubber is produced in Malaysia and Indonesia, while the Amazon's rubber industry produces much of the world's four million tons. And rubber is an important material in making gloves, balloons, footwear and many sporting goods. Thousands of other tropical plants are valuable for their industrial use.
    Many scientists strongly believe that deforestation contributes to the greenhouse effect -- or heating of the earth from increased carbon dioxide in the atmosphere. As we destroy forests, we lose their ability to change carbon dioxide into oxygen.
    Carbon dioxide levels could double within the next half-century, warming the earth by as much as 4.5 degrees. The result? A partial melt-down of polar ice caps, raising sea levels as much as 24 feet; even 15 feet could threaten anyone living within 35 miles of the coast. Unbelievable? Maybe. But scientists warn that by the time we realise the severe effects of tropical deforestation, it will be 20 years too late.
    Can tropical deforestation affect our everyday lives? Now, you should have got the answer.
    小题1:The underlined word "synthetics" probably means_________.
    A．natural rubberB．tropical materials
    C．man-made materialD．commercial rubber
    小题2:According to the passage, which of the following is NOT true?
    A．The forests are losing their function in turning carbon dioxide into oxygen.
    B．Many of our daily uses are related to the tropical forests.
    C．Tropical plants can be used to make industrial products.
    D．High carbon dioxide levels will make the earth warmer.
    小题3:The author's attitude towards the tropical deforestation is _________ .
    A．puzzlingB．coldC．supportingD．opposed
    小题4:Which of the following might be the best title for the passage?
    A．Tropical ForestsB．The Value of Tropical Forests
    C．Tropical Forests and Our LifeD．The Greenhouse Effects

    小题1:C
    小题2:A
    小题3:D
    小题4:C

    试题分析：本文主要讲述的是热带雨林对环境的诸多好处，同时也说明了热带雨林的失去对环境会带来很多的伤害。
    小题1:C推理题。根据Take rubber for example. For many uses, only natural rubber from trees will do. Synthetics are not good enough.可知这里的. Synthetics应该是与前面的natural rubber是相反的意思，指非自然的人造材料。故C项正确。
    小题2:A 推理题。文章中提及了失去了热带雨林，我们就会失去把二氧化碳转换成氧气的物体，而不是说森林失去把二氧化碳转换成氧气的的能力。故A想说法是错误的。其余三项在文章中都有涉及。
    小题3:D 推理题。作者在文章中多次提及了失去热带雨林对我们的环境的巨大影响，说明他对破坏雨林是持反对态度的。故D正确。
    小题4:C 主旨大意题。本文主要讲述的是热带雨林对环境的诸多好处，同时也说明了热带雨林的失去对环境会带来很多的伤害。故C正确。
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