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1、河北省正定县河北省正定县 2015 高考英语暑假练习（高考英语暑假练习（9）（答案或解析）（答案或解析）阅读下面短文，从每题所给的四个选项(A、B、C 和 D)中，选出最佳答案。Along the river banks of the Amazon and the Orinoco there lives a bird that swims before it can fly, flies like a fat chicken, eats green leaves, has the stomach of a cow and has claws(爪)on its wings when young
2、.They build their homes about 4.6m above the river ,an important feature(特征)for the safety of the young. It is called the hoatzin.In appearance，the birds of both sexes look very much alike with brown on the back and cream and red on the underside .The head is small, with a large set of feathers on t
3、he top, bright red eyes, and blue skin. Its nearest relatives are the common birds, cuckoos. Its most striking feature, though, is only found in the young.Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip .Using these four claws ,together with the bea
4、k(喙),they can climb about in the bushes, looking very much like primitive birds must have done. When the young hoatzins have learned to fly, they lose their claws.During the drier months between December and March hoatzins fly about the forest in groups of 20 to 30 birds, but in April, when the rain
5、y season begins, they collect together in smaller living units of two to seven birds for producing purposes.( ) 1. What is the text mainly about?AHoatzins in dry and rainy seasons.BThe relatives and enemies of hoatzins.CPrimitive birds and hoatzins of the Amazon.DThe appearance and living habits of
6、hoatzins.( ) 2. Young hoatzins are different from their parents in that Athey look like young cuckoosBthey have claws on the wingsCthey eat a lot like a cowDthey live on river banks( ) 3. What can we infer about primitive birds from the text?AThey had claws to help them climb.BThey could fly long di
7、stances.CThey had four wings like hoatzins.DThey had a head with long feathers on the top.( ) 4. Why do hoatzins collect together in smaller groups when the rainy season comes?ATo find more food.BTo protect themselves better.CTo keep themselves warm.DTo produce their young.A 篇1.选 D。考查文章主题大意。纵观全文，文章主
8、要讲的是 hoatzin 麝雉，这种鸟类的外貌以及生活习性。2.选 B。根据第一段 has claws(爪)on its wings when young,和第三段可知，hoatzin在幼年期是有爪子的，而长大学会飞之后就没有了。3.选 A。关键是 primitive“原始的，早期的”的意思。第三段第二句话。4.选 D。最后一段最后一句话。阅读理解课堂练学案（5）Passage Eleven (Superconducting Materials)The stone age, The Iron Age. Entire epochs have been named for materials. S
9、o what to call the decades ahead? The choice will be tough. Welcome to the age of superstuff. Material science - once the least sexy technology is bursting with new, practical discoveries led by superconducting ceramics that may revolutionize electronics. But superconductors are just part of the pic
10、ture: from house and cars to cook pots and artificial teeth, the world will someday be made of different stuff. Exotic plastics, glass and ceramics will shape the future just as surely as have genetic engineering and computer science.The key to the new materials is researchers increasing ability to
11、manipulate substances at the molecular level. Ceramics, for example, have long been limited by their brittleness. But by minimizing the microscopic imperfections that cause it, scientists are making far stronger ceramics that still retain such qualities as hardness and heat resistance. Ford Motor Co
12、. now uses ceramic tools to cut steel. A firm called Kyocera has created a line of ceramic scissors and knives that stay sharp for years and never rust or corrode.A similar transformation has overtaken plastics. High-strength polymers now form bridges, ice-skating rinks and helicopter rotors. And on
13、e new plastic that generates electricity when vibrated or pushed is used in electric guitars, touch sensors for robot hands and karate jackets that automatically record each punch and chop. Even plastic litter, which once threatened to permanently blot the landscape, has proved amenable to molecular
14、 tinkering. Several manufacturers now make biodegradable forms; some plastic six-pack rings for example, gradually decompose when exposed to sunlight. Researchers are developing ways to make plastics as recyclable as metal or glass. Besides, composites plastic reinforced with fibers of graphite or o
15、ther compounds made the round-the-world flight of the voyager possible and have even been proved in combat: a helmet saved an infantrymans life by deflecting two bullets in the Grenada invasion.Some advanced materials are old standard with a new twist. The newest fiberoptic cable that carry telephon
16、e calls cross-country are made of glass so transparent that a piece of 100 miles thick is clearer than a standard window pane.But new materials have no impact until they are made into products. And that transition could prove difficult, for switching requires lengthy research and investment. It can be said a firmer handle on how to move to commercialization will determine the success or failure of a country in the near future.1.How many new materials are men
