题目
题型：不详难度：来源：
Sea turtles do not have teeth but use their jaws （下巴）to eat. Their sense of smell is excellent. Their eyesight underwater is good, but they have near-sighted eyes out of water. Their special bodies make them adapt to life at sea. However, sea turtles maintain（保持） close ties to land.
Female sea turtles have to go to the seaside to lay their eggs in the sand; therefore, all baby sea turtles begin their lives on land. Most research on sea turtles has been focused on female turtles nesting and the baby sea turtles in the nest, largely because they can be found most easily. After decades of studying sea turtles, much has been learned about. However, many mysteries（谜） still remain.
Researchers do not yet know how long baby turtles spend in the open sea, or exactly where they go. People believe they spend their earliest years floating in the sea, where they do little more than eat and grow. Once turtles reach dinner-plate size, they appear at feeding grounds in waters near the shore. They grow slowly and take between 15 and 50 years to grow old enough to bear baby sea turtles, depending on the species. There is no way to know the age of a sea turtle from its physical appearance. It is believed that some species can live for over 100 years.
小题1:Which of the following statements is NOT true about sea turtles?
| A．They don’t use teeth to eat. |
| B．They have a good sense of smell. |
| C．Sea turtles are more adaptable to life at sea. |
| D．Different species have different shells. |
| A．good eyesight | B．bad eyes |
| C．excellent eyes | D．poor eyesight |
| A．Why do female turtles lay eggs on land? |
| B．Why can’t people tell how old a sea turtle is from its appearance? |
| C．Where do the baby turtles usually go? |
| D．Do sea turtles grow very fast? |
| A．Mysteries About Sea Turtles |
| B．Baby and Female Sea Turtles |
| C．The Growth of Different Sea Turtles |
| D．The Characteristics（特点） of Sea Turtles |
答案
小题1:C
小题2:D
小题3:D
小题4:D
解析
小题1:细节题。根据第二段第一行Sea turtles do not have teeth but use their jaws （下巴）to eat。Their sense of smell is excellent可知AB正确。第一段第二行The shell of each sea turtle species is different in length, color, shape and the arrangement of the scales（鳞片）.可知D正确。C项说的不清楚。
小题2:猜测句意题。根据上一句Their eyesight underwater is good。说明他们水下视力非常好，再根据but，表示后面的意思与前面相反，说明在陆地上海龟的视力很差。
小题3:细节题。根据最后一段第三行They grow slowly and take between 15 and 50 years to grow old enough to bear baby sea turtles, depending on the species.可知回答了D项。
小题4:主旨大意题。文章讲述了海龟的一些特点。
核心考点
试题【Sea turtles come in many different sizes, shapes and colors. The shell of each s】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Making an efficient icebox as not as easy as we might now suppose. In the early nineteenth century, the knowledge of the physics of heat, which was essential to a science of refrigeration, was rudimentary(未发展的). The commonsense notion that the best icebox was one that prevented the ice from melting was of course mistaken, for it was the melting of the ice that performed the cooling. Nevertheless, early efforts to economize ice included wrapping up the ice in blankets, which kept the ice from doing its job. Not until near the end of the nineteenth century did inventors achieve the delicate balance of insulation(绝缘) and circulation needed for an efficient icebox.
But as early as 1803, and ingenious Maryland farmer, Thomas Moore, had been on the right track. He owned a farm about twenty miles outside the city of Washington, for which the village of Georgetown was the market center. When he used an icebox of his own design to transport his butter to market, he found that customers would pass up the rapidly melting stuff in the tubs of his competitors to pay a premium price(高价) for his butter, still fresh and hard in neat, one-pound bricks. One advantage of his icebox, Moore explained, was that farmers would no longer have to travel to market at night in order to keep their produce cool.
小题1:Where was ice used after the Civil War?
| A．In refrigerating freight cars and households. |
| B．In hotels, taverns and hospitals |
| C．In families of New York, Philadelphia, and Baltimore. |
| D．In fresh meat, fish and butter by city dealers. |
| A．Keeping the ice from melting |
| B．Knowledge of the physics of heat. |
| C．Balance of insulation and circulation |
| D．Making efforts to reduce the use of ice |
| A．the deveopment of icebox |
| B．the theoretical foundation of icebox |
| C．the wrong ideas about icebox |
| D．the way of using icebox |
| A．Thomas Moore is the inventor of modern fridge |
| B．The butter produced by Thomas Moored is better in quality than other famers’ |
| C．Knowledge of the physics of heat plays an important part in inventing a good icebox |
| D．Before 1880, most of the sold ice was used for family use. |
| A．to sell their produce at high price |
| B．to go home earlier |
| C．to keep their produce fresh |
| D．to win more customers than their competitors |
What can explain and solve this problem? The fact is that pollution is caused by man—by his desire for a modern way of life. We make “increasing industrialization” our chief aim. So we are often ready to offer everything: clean air, pure water, good food, our health and the future of our children. There is a constant flow of people from the countryside into the cities, eager for the benefits of our modern society. But as our technological achievements have grown in the last twenty years, pollution has become a serious problem.
Isn’t it time we stopped to ask ourselves where we are going—and why? It makes one think of the story about the airline pilot who told his passengers over the loudspeaker, “I’ve some good news and some bad news. The good news is that we’re making rapid progress at 530 miles per hour. The bad news is that we’re lost and don’t know where we’re going.” The sad fact is that this becomes a true story when spoken of our modern society.
小题1:Man cannot prevent the world from being polluted mainly because______.
| A．the population of the world is decreasing fast |
| B．people use too many man-made materials |
| C．we have more and more industry |
| D．we are producing more cars, trucks and buses |
| A．Industry. | B．Health. |
| C．Clean air. | D．The future of the children. |
| A．man knows where the society is going |
| B．people do not welcome the rapid development of modern society |
| C．man can do little about the problem of pollution |
| D．the writer is worried about the future of our society |
| A．they want very much to find well-paid jobs |
| B．they are anxious to enjoy the achievements of our society |
| C．they have become tired of their homeland |
| D．they have a strong wish to become industrial workers |
The Internet has led to a huge increase in credit-card fraud. Your card information could even be for sale in an illegal web site.
Web sites offering cheap services should be regarded with care. On-line shoppers who enter their credit-card information may never receive the goods they thought they bought.
The thieves then go shopping with your card number--- or sell the information over internet.
Computers hackers（黑客） have broken down security（安全） systems raising questions about the safety of cardholder information. Several months ago, 25,000 customers of CD Universe, and on-line music retailer（批发商）, were not lucky. Their name, addresses and credit-card numbers were posted on a web site after the retailer refused to pay US $157,828 to get back the information.
Credit-card firms are now fighting against on-line fraud. Master-card is working on plans for Web-only credit card, with a lower credit limit. The card could be used only for shopping on-line. However, there are a few simple steps you can take to keep from being cheated.
Ask about your credit-firm’s on-line rules. Under British law, cardholders are responsible for the first US $78 of any fraudulent spending.
And shop only at secure sites: Send your credit-card information only if the web site offers advanced secure system. If the security is in place, a letter will appear in the bottom right-hand corner of your screen. The web site address may also start the extra “s” stands for secure.
If you still have any doubt, give your credit-card information over the telephone.
Keep your password safe: Most on-line sites require a user name and password before placing an order. Treat your password with care.
小题1:What do most people worry about the Internet according to this passage?
| A．fraud on the Internet | B．computer hackers |
| C．illegal web site | D．shopping on line |
| A．1 | B．2 | C．3 | D．4 |
| A．You can go to the website and buy it without doubt. |
| B．Send your credit card information as soon as the web asks you to do so. |
| C．Give your credit card information over telephone if you have doubt. |
| D．Don’t pay money until your TV set is sent to you. |
| A．Computer hackers sold the retailer’s information to a web site to get money. |
| B．A reliable website offers you an advanced secure system. |
| C．You can depend on the password to protect your information. |
| D．The on-line credit-card thieves stole your credit-card and paid with it. |
Authoring a blog, maintaining a blog or adding an article to an existing blog is called “blogging”. Blogging has revolutionized Internet publishing in the last several years because it gives everyone with Internet access the opportunity to become an online writer. Objects, such as “text and photos” in a blog can be called “blog posts”, “posts”, or “entries”. The person who posts these entries is called a “blogger”.
Now, somewhere around the world, a blog is created almost every 6 seconds. Because it’s great potential, Bill Gates views it as important as e-mail, BBS, and MSN. He’s trying to make blogs the important tools for future business communications.
小题1:A blog is .
| A．a comment | B．an Internet journal |
| C．a design | D．a link |
| A．talk to others | B．give comments | C．read articles | D．enjoy photos |
| A．A person who posts letters. |
| B．A person who writes articles. |
| C．A person who posts text or photos in a blog. |
| D．A person who is an online publisher. |
| A．give everyone the chance to be an online writer |
| B．can be created by people without much knowledge of computer technology |
| C．enable a blogger to place news, personal thoughts, text and photos and give comments |
| D．all of the above |
Researchers think they may be able to stop AIDS from connecting to T4 ceils．When AIDS virus finds a T4 cell，it actually connects to a part of the cell called CD4 protein．
Researchers want to fool the virus by putting copies or clones of the CD4 protein into the blood．This way the AIDS virus will connect to cloned protein instead of the real ones．Scientists use genetic engineering methods to make the clones．Normally a CD4 protein remains on the T4 cell at all times；the AIDS virus must go to it．
In a new technique，however，the cloned CD4 protein is not connected to a cell．It floats freely，so a lot more can be put into the blood to keep the AIDS virus away from real CD4 protein on T4 cells．One report says the．AIDS virus connects to cloned protein just as effectively as it connects to real protein．That report was based on tests with blood cells grown in labs．The technique is just now beginning to be tested in animals．If successful，it may be tested in humans within a year．
小题1:The new technique can .
| A．cure AIDS |
| B．kill the AIDS virus |
| C．prevent the AIDS virus from spreading |
| D．produce new anti-AIDS cells |
| A．itself |
| B．the blood cells |
| C．the CD4 protein |
| D．the genetic material of T4 lymphocytes |
| A．cloned protein stays On the T4 cells |
| B．it connects to cloned protein more effectively |
| C．cloned protein is made by genetic engineering methods |
| D．cloned protein floats freely，and many more can be put into the blood |
| A．The new technique has been tested in labs． |
| B．The new technique is being tested in animals． |
| C．The new technique may be tested in humans． |
| D．The new technique is now under clinic test． |
| A．AIDS-a deadly disease |
| B．A new technique in fighting AIDS |
| C．The spread of AIDS virus |
| D．The cloned CD4 protein |
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