When someone says “SHARK” most people think of a big, toothy, underwater animal; basically we are imagining a Great White. In fact sharks come in all shapes, sizes and even colors! Follow me please; I’d like to show you a very special small shark commonly known as horn sharks, only found in the coastal waters of north-west North America.
Look at this shark, and you can easily see the horns on it and you will know the reason why it is called the horn shark is that it has the broad, flattened head and two large horn-like spines(脊椎) found behind its eyes and makes it one of the hardiest of all shark species. What makes it unique is that as its enemy attempts to swallow it, the spines on its back will stick into the enemy’s mouth and give a good chance for it to get away.
The horn shark is brown in color with black spots all over its body. The adults can reach up to a length of 4 feet and weigh up to 10 kg. An interesting fact about the horn shark is that it has five gills(鳃). The horn shark is a clumsy swimmer using its flexible pectoral fins(胸鳍)to push itself along the bottom of the ocean. The maximum distance that has ever been recorded for a horn shark to have traveled out from its habitat is 10 miles.
Today, as so little is known about its population off the Californian coast, they have been listed as being “Data Deficient” in the World Conservation Union. The horn shark is being threatened both by water pollution and commercial fishing in the area. Though they are not among those sea creatures hunted primarily for food, but they often get caught as a by-catch in fishing expeditions.
【小题1】The horn shark gets its name for______.
| A．its small size | B．its large eyes |
| C．its two large spines | D．its brown color with spots |
| A．By giving descriptions | B．By following time order |
| C．By analyzing causes | D．By making comparisons |
| A．①② | B．②③ | C．①④ | D．③④ |
| A．it doesn’t travel far |
| B．it is good at swimming |
| C．its spines can be used to attack the enemy and escape |
| D．it is only found in the coastal waters of north-west North America |
【小题1】C
【小题2】A
【小题3】D
【小题4】B
解析试题分析：本文是一篇说明文。文章介绍了北美西北部海域中的horn shark角鲨。
【小题1】考查细节理解。根据文章第二段中的you will know the reason why it is called the horn shark is that it has the broad, flattened head and two large horn-like spines(脊椎) found behind its eyes and makes it one of the hardiest of all shark species.可知，它之所以被称作角鲨，是因为它有两个角状的脊椎在眼睛的后面。故选C。
【小题2】考查写作方法。文章的第三段采用的是描述的方法。先描述外形颜色，再描述身体的长度形状等。
【小题3】考查细节理解。根据文章的最后一段中so little is known about its population off the Californian coast和he horn shark is being threatened both by water pollution可知选D。
【小题4】考查细节理解。根据题干的意思：下面哪个不是角鲨的唯一特性可知，B. it is good at swimming
善于游泳——不是它的唯一特性。因为其他鲨鱼也善于游泳。其他三项是鲨鱼的唯一特性。
考点：考查说明文的阅读能力。
寒假乐园北京教育出版社系列答案科目：高中英语 来源： 题型：阅读理解
If a diver surfaces too quickly, he may suffer the bends. Nitrogen (氮) dissolved (溶解) in his blood is suddenly liberated by the reduction of pressure. The consequence, if the bubbles (气泡) accumulate in a joint, is sharp pain and a bent body — thus the name. If the bubbles form in his lungs or brain, the consequence can be death.
Other air-breathing animals also suffer this decompression (减压) sickness if they surface too fast: whales, for example. And so, long ago, did ichthyosaurs (鱼龙). That these ancient sea-animals got the bends can be seen from their bones. If bubbles of nitrogen form inside the bone they can cut off its blood supply. This kills the cells in the bone, and consequently weakens it, sometimes to the point of collapse. Fossil(化石)bones that have caved in on themselves are thus a sign that the animal once had the bends.
Bruce Rothschild of the University of Kansas knew all this when he began a suty of ichthyosaurs bones to find out how widespread the problem was in the past. What he particularly wanted to investigate was how ichthyosaurs adapted to the problem of decompession over the 150 milllion years. To this end, he and his colleagues traveled the world’s natural-history museums, looking at hundreds of ichthyosaurs from the Trassic period and from the later Jurassic and Cretaceous periods.
When he started, he assumed that signs of the bends would be rarer in younger fossils, reflecting their gradual evolution of measures to deal with decompression. Instead, he was astonished to discover the opposite. More than 15% of Jurassic and Cretaceous ichthyosaurs had suffered the bends before the died, but not a single Trassic specimen showed evidence of that sort of injury.
If ichthyosaurs did evolve an anti-decompression means, they clearly did so quickly — and, most strangly, they lost it afterwards. But that is not what Dr Rothchild thinks happened. He suspects it was evolution in other animals that caused the change.
Whales that suffer the bends often do so because they have sufaced to escape a predator (捕食动物) such as a large shark. One of the features of the Jurassia oceans was an abundance of large sharks and crocodiles, both of which were fond of ichthyosaurs lunches. Trassic oceans, by contrast, were mercifully shark-and crocodile-free. In the Trassic, then, ichthyosaurs were top of the food chain. In the Jurrasic and Cretaceous, they were prey (猎物) as well as predator —and often had to make a speedy exit as a result.
【小题1】Which of the following is a typical symptom of the bends?
| A．A twisted body. |
| B．A gradual decrease in blood supply. |
| C．A sudden release of nitrogen in blood. |
| D．A drop in blood presure. |
| A．how often ichthyosaurs caught the bends |
| B．how ichthyosaurs adapted to decompression |
| C．why ichthyosaurs bent their bodies |
| D．when ichthyosaurs broke their bones |
| A．confirmed his assumption | B．speeded up his research process |
| C．disagreed with his assumption | D．changed his research objectives |
| A．failed to evole an anti-decompression means |
| B．grdually developed measures against the bends |
| C．died out because of large sharks and crocodiles |
| D．evoled an anti-decompression means but soon lost it |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
Rae and Bruce Hostetler not only work very hard,they also relax just as well. Numerous vacations help the couple to maintain their health and emotional well-being一and it’s no surprise to health care professionals.
“Rest, relaxation, and stress reduction are very important for people’s well-being and health. This can be accomplished through daily activities, such as exercise and meditation, but vacation is an important part of this as well,” said primary care physician Natasha Withers from One Medical Group in New York. Withers lists a decreased risk of heart disease and improved reaction time as some of the benefits from taking some time off. “We also know that the mind is very powerful and can help with healing, so a rested, relaxed mind is able to help the body heal better,” said Withers.
Psychologists confirm the value of vacations for the mind. “The impact that taking a vacation has on one’s mental health is great,” said Francine Lederer, a clinical psychologist in Los Angeles who specializes in stress and relationship management. “Most people have better life perspective and are more motivated to achieve their goals after a vacation, even if it is a 24- hour time-out.” The trips could be good for their health, good for their family and good for their businesses.
The online travel agency Expedia conducted a survey about vacation time in 2010, and according to their data the average American earned 18 vacation days一but only used 14 of them. France topped the list, with the average worker earning 37 vacation days and using all but two of them. Americans’ responses may not be surprising in a culture where long hours on the job often are valued, but that’s not always good for the individual, the family or the employer.
Psychologists have also found that people who don’t take enough time to relax may find it harder to relax in the future. “Without time and opportunity to do this, the nerve connections that produce feelings of calm and peacefulness become weaker, making it actually more difficult to shift into less-stressed states,” Mulhem said.
【小题1】How did the author introduce the topic of the text?
| A．By making comparisons. | B．By giving an example. |
| C．By raising questions. | D．By providing data. |
| A．dislike family gatherings |
| B．have the shortest vacation |
| C．enjoy as many vacations as the French |
| D．think much of spending long hours on the job |
| A．One should never wait to relax. |
| B．Work and rest go against each other. |
| C．Time and opportunity wait for no man. |
| D．A relaxed mind determines everything. |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
If you hear the sound of running water the next time you call a co-worker on his or her mobile phone, don’t be surprised. Three-fourths of Americans with mobile phones say they use them in the bathroom, a new study shows.
Approximately the same number of men and women have used the phone in the bathroom, according to a survey of 1,000 Americans by 11mark, an integrated marketing agency, although men seem more attached to IT in the toilet: 30 percent of men versus 20 percent of women agreed with the statement, "I don't go to the bathroom without my mobile phone."
More than half the surveyed users (63 percent) said they have answered a phone call in the bathroom, and almost half (41 percent) reported initiating a phone call. That's not all, however. What goes on behind the walls of the stalls is anything a mobile phone is capable of. Sixty-seven percent said they have read a text, and 39 percent have surfed the Web. Men work more from the bathroom — 20 percent said they have participated in work-related calls, versus 13 percent of their female colleagues.
As expected, Gen Y respondents are the pacesetters in the "mobile everywhere" movement, with 91 percent using their phone in the bathroom. Still, older generations are not far behind. Eighty percent of Gen X(1961-1981) reported using the phone in the bathroom, as did 65 percent of Baby Boomers and 47 percent of the Silent Generation.
While online, they are doing more than just surfing; 16 percent of Gen Y report they have made an online purchase while in the bathroom. Users of iPhones are particularly likely to browse and buy in the bathroom – 22 percent have made a purchase, versus 10 percent of Americans with mobile phones overall.
"The writing is on the stall," said 11mark principal Nicole Burdette. "This study confirms what we all know: that the last private place is no longer private."
In the process, high-tech hygiene(卫生) is taking a hit, the survey found. While 92 percent of mobile phone users said they wash their hands after using the bathroom, only 14 percent said they wash their phones.
【小题1】59.Which is the best word to replace the underlined word "initiating"?
| A．receiving | B．experiencing | C．ending | D．beginning |
| A．no wonder mobile phones are used in the bathroom |
| B．the bathroom is a private place for people |
| C．it makes people have no privacy at all |
| D．more men have used the phone in the bathroom |
| A．Using phones in the bathroom has a bad effect on hygiene |
| B．Mobile phones should not be allowed to use in the bathroom |
| C．Most people care about the hygiene after using the bathroom |
| D．Few people wash their phones after using the bathroom |
| A．supportive | B．disapproval |
| C．subjective(主观的) | D．objective(客观的) |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
When people first walked across the Bering Land Bridge thousands of years ago, dogs were by their sides, according to a study published in the journal Science.
Robert Wayne of the University of California, Los Angeles, and Jennifer Leonard of the Smithsonian Institute, used DNA material—some of it unearthed by miners in Alaska—to conclude that today’s domestic dog originated in Asia and accompanied the first humans to the New World about 10,000 to 15,000 years ago. Wayne suggests that man’s best friend may have enabled the tough journey from Asia into North America. “Dogs may have been the reason people made it across the land bridge,” said Wayne. “They can pull things, carry things, defend you from fierce animals, and they’re useful to eat.”
Researchers have agreed that today’s dog is the result of the domestication(驯化) of wolves thousands of years ago. Before this recent study, a common thought about the precise origin of North America’s domestic dog was that Natives domesticated local wolves, the descendents(后代) of which now live with people in Alaska, Canada, and the Lower 48.
Dog remains from a Fairbanks-area gold mine helped the scientists reach their conclusion. Leonard, an evolutionary biologist, collected DNA from 11 bones of ancient dogs that were locked in permafrost(永冻层) until Fairbanks miners uncovered them in the 1920s. The miners donated the preserved bones to the American Museum of Natural History in New York City, where they remained untouched for more than 70 years. After borrowing the bones from the museum, Leonard and her colleagues used radiocarbon techniques to find the age of the Alaska dogs. They found the dogs all lived between the years of 1450 and 1675 A.D., before Vitus Bering and Aleksey Chirikov who were the first known Europeans to view Alaska in 1741. The bones of dogs that wandered the Fairbanks area centuries ago should therefore be the remains of “pure native American dogs,” Leonard said. The DNA of the Fairbanks dogs would also expose whether they were the descendents of wolves from North America.
Along with the Fairbanks samples, the researchers collected DNA from bones of 37 dog specimens(标本) from Mexico, Peru, and Bolivia that existed before the arrival of Columbus. In the case of both the Alaska dogs and the dogs from Latin America, the researchers found that they shared the most genetic material with gray wolves of Europe and Asia. This supports the idea of domestic dogs entering the New World with the first human explorers who wandered east over the land bridge.
Leonard and Wayne’s study suggests that dogs joined the first humans that made the adventure across the Bering Land Bridge to slowly populate the Americas. Wayne thinks the dogs that made the trip must have provided some excellent service to their human companions or they would not have been brought along. “Dogs must have been useful because they were expensive to keep,” Wayne said. “They didn’t feed on mice; they fed on meat, which was a very guarded resource.”
【小题1】 The underlined word “remains” is closed in meaning to ______.
| A．leftover food | B．animal waste |
| C．dead bodies | D．living environment |
| A．ancient dogs entered North America between 1450 and 1675 AD |
| B．the 11 bones of ancient dogs are not from native American dogs |
| C．the bones discovered by the gold miners were from North American wolves |
| D．the bones studied were not from dogs brought into North America by Europeans |
| A．Native Americans domesticated local wolves into dogs. |
| B．Scientists discovered some ancient dog remains in 1920s. |
| C．Latin America’s dogs are different from North America’s in genes. |
| D．Ancient dogs entered North America across the Bering Land Bridge. |
| A．dogs fed on mice | B．dogs were easy to keep |
| C．dogs helped protect their resources | D．dogs could provide excellent service |
| A．the origin of the North American dogs |
| B．the DNA study of ancient dogs in America |
| C．the reasons why early people entered America |
| D．the difference between Asian and American dogs |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
Medicine comes in lots of different packages. Painkillers in a tablet can make your headache go away. Antibiotic cream (抗菌素膏) from a tube can prevent your cuts from becoming infected. But can medicine come packaged in chicken eggs?
A team of scientists from Scotland say “yes”. They’ve engineered special chickens that lay eggs with disease-treating drugs inside.
These eggs come from chickens that have been engineered to produce certain drugs inside their egg whites.
These drugs are made of molecules called proteins(蛋白质). Animals make thousands of proteins — they’re the main element in skin, hair, milk and meat. Since animals can make proteins easily, they’re good candidates (候选者) for making protein drugs.
Researchers have already made cows, sheep and goats produce protein drugs in their milk. But chickens are cheaper to take care of, need less room, and grow faster than these other animals. Those qualities could make chickens a better choice to become living drug factories, says Simon Lillico of the Roslin Institute near Edinburgh, Scotland.
Lillico and a team of researchers changed chickens’ DNA — the code that tells cells how to make proteins — so that the birds’ cells made two protein drugs. One drug can treat skin cancer, and the other treats a nerve disease called multiple sclerosis (多发性硬化).
The scientists changed the chickens’ DNA so that the birds made these drugs only in their egg whites. This protects the chickens’ bodies from the drugs’ possible harmful effects and makes it easy for scientists to collect the drugs.
【小题1】If you cut your finger, you may use ________ to cure it.
| A．painkillers in a tablet | B．antibiotic cream from a tube |
| C．chicken eggs | D．protein drugs |
| A．Scientists from Scotland have succeeded in packing medicine into chicken eggs. |
| B．The drugs are made of molecules called proteins. |
| C．Scientists chose chickens for their experiments because chicken eggs taste delicious. |
| D．The animals are good candidates for making protein drugs. |
| A．treat lung cancer | B．help reduce headache |
| C．change people’s DNA | D．treat multiple sclerosis |
| A．eating eggs is the best choice for the patients now |
| B．scientists changed the chicken’s DNA and put all the drugs in chicken eggs |
| C．we may eat special eggs as drugs when we are sick in the future |
| D．the drugs produce harmful effects on the chicken’s bodies |
| A．Chicken Eggs to Replace Medicine | B．Chicken Eggs as Drug |
| C．Chicken Eggs and Medicine | D．Chicken Eggs and Animal Milk |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
English is an important global language, but that doesn’t mean it’s easy to learn. Many experts have tried to make English easier for students to learn―but they weren’t always successful.
In 1930, Professor CK Ogden of Cambridge University invented Basic English. It had only 850 words (and just eighteen verbs) and Ogden said most people could learn it in just thirty hours. The problem was that people who learned Basic English could write and say simple messages, but they couldn’t understand the answers in “real” English! It was also impossible to explain a word if it wasn’t in the Basic English word list. For example, if you wanted a watermelon, you asked for “a large green fruit with the form of an egg, which has a sweet red inside and a good taste”!
RE Zachrisson, a university professor in Sweden, decided that the biggest problem for learners of English was spelling, so he invented a language called Anglic. Anglic was similar to English, but with much simpler spelling. “Father” became “faadher”, “new” became “nue’ and “years” became “yeerz”. Unfortunately for some students of English, Anglic never became popular.
Even easier is the language which ships’ captains use: it’s called “Seaspeak”. Seaspeak uses a few simple phrases for every possible situation. In Seaspeak, for example, you don’t say, “I’m sorry what did you say?” or “I didn’t understand, can you repeat that?” It’s just “Say again.” No more grammar!
In the age of international communication through the Internet who knows? ... a new form of English might appear. A large number of the world’s e-mails are in English and include examples of “NetLingo” like OIC (Oh, I see) and TTYL (Talk to you later). In another fifty years, English might not exist ... we will probably all speak fluent Internetish!
【小题1】The best title for the passage would be ______.
| A．Seaspeak | B．Basic English |
| C．Internetish | D．Easy English |
| A．six | B．four | C．two | D．three |
| A．Grammar. | B．Vocabulary. |
| C．Speaking. | D．Spelling. |
| A．IOU | B．A graet batl. |
| C．Long time no see. | D．Two five, no lights. |
| A．It might be replaced by Internetish. |
| B．It might become a global language. |
| C．It might take the place of all other languages. |
| D．It might become more and more difficult. |
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
Country music is one of the most popular kinds of music in the United States today because it is about simple but strong human feelings and events-love, sadness, good times, and bad times. It tells real-life, stories and sounds the way people really talk. As life becomes more complicated(复杂), it is good to hear music about ordinary people.
Country music, sometimes called country-western, comes from two kinds of music. One is the traditional music of the people in the Appalachian Mountains in the eastern Unite States. The other is traditional cowboy music from the west. The singers usually play guitars, and in the 1920s they started using electric guitars. At first city people said country music was low class. It was popular mostly in the South. But during World War II, thousands of Southerners went to the Northeast and Midwest to work in the factories. They took their music with them. Soldiers from the rest of the country went to army camps（军营）in the South. They learned country music. Slowly it became popular all over the country.
Today country music is also popular everywhere in the United States and Canada—in small towns and in New York City, among black and white, and among educated and uneducated people. About 1, 200 radio stations broadcast country music twenty-four hours a day. English stars sing it in British English, and people in other countries sing it in their own languages. The music that started with cowboys and poor southerners is now popular all over the world.
【小题1】It can be learned from the passage that country music comes from .
| A．the Northeast and Midwest |
| B．factories and army camps in the South |
| C．real-life stories in small towns |
| D．the Appalachian Mountains and the West |
| A．the north | B． the south | C．the Midwest | D．the Northeast |
| A．they wanted to take music with them |
| B．they wanted to make other people like country music |
| C．they wanted to work in the factories there |
| D．they wanted to make country music popular |
| A．city people said it was low class |
| B．people could sing it in many different languages |
| C．it started with cowboys and poor Southerners |
| D．it is loved by different kinds of people in the world |
| A．Country music is about human feelings and events. |
| B．Country music is sung by stars all in English. |
| C．Country music is popular among city people today. |
| D．City people didn’t like country music at first. |
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com