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2014高考英语冲刺阅读理解专项 50-34AWalk through the Amazon rainforest today and you will find it is steamy, warm, damp and thick. But if you had been around 15,000 years ago, during the last ice age, would it have been the same? For more than 30 years, scientists have been arguing about how rainforests like the Amazon might have reacted（反应）to the cold, dry climates of the ice ages, but until now, no one has reached a satisfying answer. Rainforests like the Amazon are important for mopping up CO2 from the atmosphere and helping to slow global warming. Currently the trees in the Amazon take in around 500 million tones of CO2 each year; equal to the total amount of CO2 giving off in the UK each year. But how will the Amazon react to future climate change? If it gets drier ,will it still survive and continue to draw down CO2 ? Scientists hope that they will be able to learn in advance how the rainforest will manage in the future by understanding how rainforests reacted to climate change in the past. Unfortunately, getting into the Amazon rainforest and collecting information are very difficult. To study past climate, scientists need to look at fossilized pollen, kept in lake muds. Going back to the last ice age means drilling deep down into lake sediments （沉淀物）, which requires specialized equipment and heavy machinery . There are very few roads and paths, or places to land helicopters and aeroplanes. Rivers tend to be the easiest way to enter the forest ,but this still leaves vast areas between the rivers completely unsampled（未取样）. So far, only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon rainforest reacts to climate change. 1. The underlined phrase “mopping up” in the second paragraph means _.A. cleaning up B. taking in C. wiping out D. giving out 答案解析：答案为B。本题为词义推断题。结合上下文，与mopping up并列的是 “helping to slow global warming”，由此可以推断，mop up 就是去除CO2；并且后面的 “Currently the trees in the Amazon take in around 500 million tones of CO2 each year”中的 “take in” 也对此进行了呼应，故答案为B。“clean up”意为 “清洁”； “wipe out” 意为 “消灭，彻底摧毁”； “give out”意为“分发，散发”。2. How will the Amazon rainforest react to future climate change?A. Itll get drier and continue to remove C O 2.B. Itll remain steamy, warm, damp and thickC. Itll get warmer and then colder and drier.D. There is no exact answer up to present.答案解析：答案为D。本题为细节题。第二段提出问题，第三段进行探索问题。结合第三段首句 “Unfortunately, getting into the Amazon rainforest and collecting information are very difficult.” 和最后一句 “So far, only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon rainforest reacts to climate change.” 可知，收集信息非常困难，即使目前收集到的一点信息也没有哪一点可以作出证明。故答案为D。3. Whats the main idea of the last paragraph?A. Its important to drill deep down into lake sediments to collect information.B. Its impossible to prove how climate changes in the Amazon rainforest.C. Its hard to collect information for studies of the past climate in the Amazon rainforest.D. Its necessary to have specialized equipment and machinery to study the past climate. 答案解析：答案为C。从第三段的最后一句话 “So far, only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon rainforest reacts to climate change.” 可知，答案为C。B选项显得绝对。4. The best title for this passage may probably be_.A. Studies of the Amazon B. Climates of the AmazonC. Secrets of the Rainforests D. Changes of the Rainforests答案解析：答案为C。 本文第一段前两句提出问题，第三句话引入文本的讨论点：热带雨林的变化。下文以亚马逊热带雨林为例进行研究，最终发现很难收集资料去证明热带雨林的变化，热带雨林的秘密有待人们去探索。故答案为C。本文的重心是在讨论如何收集到足够的证据来证明热带雨林的变化，而不是揭示热带雨林有何变化。故排除干扰性最强的D选项。BWind is the great maker of waves. There are exceptions, such as the tidal (潮汐的) waves sometimes produced by earthquakes under the sea. But the waves most of us know are produced by winds blowing over the sea.Now before constructing an imaginary life history of a typical wave, we need to know certain physical things about it. A wave has height, from trough (low point) to crest (high Point). It has long-the distance from this crest to that of the following wave. The period of the wave means the time it takes for succeeding crests to pass a fixed point. None of these things stays the same-for all depend upon the wind, upon the depth of the water and many other matters.The water that makes up a wave does not advance with it across the sea. Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its original position. And it is fortunate that this is so. For if the huge masses of water that make up a wave actually moved across the sea, sailing would be impossible.If we want to find the speed of a wave, we may use the following way:Speed = wavelength frequencyHere, wavelength is the distance between two high points (crests), frequency means the number of cycles per second 1. What causes waves?A. Earthquakes and nothing else. B. Only wind.C. Wind causes most waves. D. Wind causes some waves.答案解析：答案为C。本题为细节题。由第一段的最后一句话 “But the waves most of us know are produced by winds blowing over the sea.” 可知，答案为C。2. Which of the following is true according to the passage?A. The water of a wave moves away across the sea.B. The water of a wave remains almost at the same place.C. The water of a wave goes with the passing of the wave.D. The length of a wave means the distance from the top of a wave to the bottom.答案解析：答案为B。本题为细节题。从第三段 “The water that makes up a wave does not advance with it across the sea. Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its original position.” 可知，组成波的水并不随着波的前进而前进，每一滴水随着波的前进形成了一个小圆圈，但是几乎回到原位置。故A，C错误，B选项正确。最后一段提到 “Here, wavelength is the distance between two high points (crests)”, 故答案D错误。3. The speed of Wave 1 is 100 cm/s, frequency 10. The frequency of Wave 2 is 300, while its speed is twice that of Wave 1. Which of the following is right?A. The wavelengths of the two are equal.B. The wavelength of Wave 1 is 10 times longer than that of Wave 2.C. The wavelength of Wave 2 is longer than that of Wave 1.D. The wavelength of Wave 1 is longer than that of Wave 2.答案解析：答案为D。本题为计算题。按照后文提到的公式 “Speed = wavelength frequency” 即可计算出答案为D。
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