摘要:If the population of the Earth keeps on 1 at its present rate,there will? 2 not be enough resources left to support life on the planet.By the middle of the 21st century,if present trends continue,we 3 (use)up all the oil that drive our cars,for example.Even if scientists develop new ways of feeding the human race,the crowded conditions on Earth will make it 4 for us to look for somewhere else.But 5 of the other planets in our solar system are capable of supporting life at present.One possible solution to the problem,? 6 ,hasrecentlybeen suggested by an American scientist,Professor Carl Sagan.Sagan believes that 7 the Earth,s resources are completely? 8 ,it will be possible to change the atmosphere of Venus and 9 create a new world almost as large as Earth itself.Something is difficult.Venus is much hotter than the Earth.? 10 ,there is only a tinyamountof water there.

网址:http://m.1010jiajiao.com/timu3_id_2553447[举报]

  You may think that sailing is difficult, but it is really not hard to learn it. You do not need to be strong. But you need to be quick. And you need to understand a few basic rules about the wind.

  First, you must ask yourself, “Where is the wind coming from? Is it coming from ahead or behind or from the side?” You must think about this all the time on the boat. The wind direction tells you what to do with the sail(帆).

  Let’s start with the wind blowing from behind. This means the wind and the boat are going in the same direction. Then you must always keep the sail outside the boat. It should be at a 90° angle (角度) to the boat. Then it will catch the wind best.

  If the wind is blowing from the side, it is blowing across the boat. In this case, you must keep the sail half way outside the boat. It should be at a 45° angle to the boat. It needs to be out far enough to catch the wind. but it shouldn’t flap (摆动). It shouldn’t look like a flag on a flagpole. If it is flapping, it is probably out too far, and the boat will slow down.

  Sailing into the wind is not possible. If you try, the sail will flap and the boat will stop. You may want to go in that direction. It is possible, but you can’t go in a straight line. You must go first in one direction and then in another. This is called tacking. When you are tacking, you must always keep the sail inside the boat.

64. What should you consider first while sailing?

  A. Sailors’ strength.

  B. Wave levels.

  C. Wind directions.

  D. Size of sails.

65. What does the word “It” underlined in Paragraph 4 refer to?

  A. The sail.

  B. The wind.

  C. The boat.

  D. The angle.

66. What do you have to do when sailing against the wind?

  A. Move in a straight line.

  B. Allow the sail to flap.

  C. Lower the sail.

  D. Tack the boat.

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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 goods and services should be regarded with care. On-line shoppers who enter their credit-card information may never receive the goods they bought. The thieves then go shopping with your card number — or sell the information over the Internet.?

Computers hackers have broken down security systems, raising questions about the safety of cardholder information. Several months ago,25 000 customers of CD Universe, an on-line music retailer(批发商),were not lucky. Their names, 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. MasterCard 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-card 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 with https:// — the extra “s” stands for secure. If in doubt, give your credit-card information over the telephone.?

Keep your password safe: Most online sites require a user name and password before placing an order. Treat your passwords with care.?

1.What do most people worry about the Internet according to this passage??

       A.A lot of stolen credit-cards were sold on the Internet.?

       B.Fraud on the Internet.?

       C.Many Web sites are destroyed.?

       D.Many illegal Web sites are on the Internet.

2.What is the meaning of “fraud”??

       A.cheating          B.sale                C.payment            D.safety

3.How many pieces of advice does the passage give to you??

       A.Four.                  B.Three.                 C.Five.                   D.Six.

4.You are shopping on the site: http://www.shopping.com,and you want to buy a TV set, what does this article suggest doing?

       A.Order the TV set at once.?

       B.Do not buy the TV set on this site.?

       C.E-mail the site your credit-card information.?

       D.Tell the site your password and buy the TV set for you.

 

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Did you ever look up at the moon and think you saw a man’s face there? When the moon is round and full, the shadows(影子) of the moon mountains and the lines of the moon valleys sometimes seem to show a giant nose and mouth and eyes. At least, some people think so.

  If there were a man on the moon—instead of mountains and valleys that just look like the face of a man—what would he be like?

  He would not be like anyone you know. He would not be like anyone anybody knows.

  If the man on the moon were bothered by too much heat or cold the way Earth people are, he could not stay on the moon.

  The moon becomes very, very hot. It becomes as hot as boiling water. And the moon becomes very, very cold. It becomes colder than ice.

  Whatever part of the moon the sun shines on is hot and bright. The rest of the moon is cold and dark.

  If the man on the moon had to breathe to stay alive, he couldn’t live on the moon because there’s no air there. He’d have to carry an oxygen tank, as astronauts do. There’s no food on the moon, either. Nothing grows—not even weeds(grass).

  If the man on the moon liked to climb mountains, he would be very happy. There are many high places there, such as the raised land around the holes, or craters(火山口), of the moon. Some of these rims are as tall as Earth’s highest mountains.

  But if the man on the moon liked to swim, he would be unhappy. There is no water on the moon—just dust and rock.

  When you think of what it’s like on the moon, you may wonder why it interests our scientists. One reason is that the moon is Earth’s nearest neighbor—it is the easiest place in space to get to.

  Going back and forth between the moon and Earth, astronauts will get a lot of practice in space travel. Things learned on moon trips will be of great help to astronauts who later take long, long trips to some of the planets.

  Scientists are also interested in the moon because it has no air. The air that surrounds Earth cuts down the view of the scientists who look at the stars through telescopes. A telescope on the moon would give them a clearer, closer view of the stars.(words: 411)

1.What is the reason why our scientists are interested in the moon.?

A.The moon is beautiful.

B.The moon is different from the earth.

C.The moon is Earth’s nearest neighbor—it is the easiest place in space to get to.

D.The moon is the easiest place in space to get to and it has no air, unlike Earth.

2.The underlined word “rim” in the Paragraph 8 means _________ .

A.ball              B.hill               C.round edge        D.height

3.What is the main thought of the passage?

A.We can learn much from research on the Moon.

B.There may be human beings on the moon.

C.If there were a man on the Moon, there would be many similarities between the man on the Moon and on the Earth.

D.A telescope on the Moon would help scientists have a clearer, closer sight of the stars.

 

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The Basics of Math-Made Clear

  Basic Math introduces students to the basic concepts of mathematics, as well as the fundamentals of more tricky areas.These 30 fantastic lectures are designed to provide students with an understanding of arithmetic and to prepare them for Algebra(代数)and beyond.

  The lessons in Basic Math cover every basic aspect of arithmetic.They also look into exponents(指数), the order of operations, and square roots.In addition to learning how to perform various mathematical operations, students discover why these operations work, how a particular mathematical topic relates to other branches of mathematics, and how these operations can be used practically.

  Basic Math starts from the relatively easier concepts and gradually moves on to the more troublesome ones, so as to allow for steady and sure understanding of the material by students.The lectures offer students the chance to “make sense” of mathematical knowledge that may have seemed so frightening.They also help students prepare for college mathematics and overcome their anxiety about this amazing-and completely understandable-field of study.

  By the conclusion of the course, students will have improved their understanding of basic math.They will be able to clear away the mystery(神秘性)of mathematics and face their studies with more confidence than they ever imagined.In addition, they will strengthen their ability to accept new and exciting mathematical challenges.

  Professor H.Siegel, honored by Kentucky Educational Television as “the best math teacher in America,” is a devoted teacher and has a gift for explaining mathematical concepts in ways that make them seem clear and obvious.From the basic concrete ideas to the more abstract problems, he is master in making math lectures learner-friendlier and less scary.

  With a PhD in Mathematics Education from Georgia State University, Dr.Siegel teaches mathematics at Central Arizona College.His courses include various make-up classes and a number of lectures for future primary school teachers.

  If the course fails to provide complete satisfaction to you, you can easily exchange it for any other course that we offer.Or you can get your money back.

(1)

What does the course Basic Math mainly cover?

[  ]

A.

Algebra.

B.

College Mathematics.

C.

Arithmetic.

D.

Mathematics Education.

(2)

What benefits can students expect from Basic Math?

[  ]

A.

Stronger imaginative ability.

B.

Additional presentation skills.

C.

More mathematical confidence.

D.

Greater chances of becoming teachers.

(3)

What can we learn about Professor H.Siegel?

[  ]

A.

He is a guest lecturer at Kentucky Educational Television.

B.

He is to deliver 30 lectures in Basic Math.

C.

He works in Georgia State University.

D.

He specializes in training teachers.

(4)

Where is the passage most likely to have been taken from?

[  ]

A.

A news report.

B.

A book review

C.

A lesson plan.

D.

An advertisement

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The Internet has led to a huge increase in credit-card (信用卡) fraud. Your card information could even be for sale in an illegal web site(非法网站).

  Web sites offering cheap goods and 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 the 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, an on-line music retailer (零售商) , were not lucky. Their names, 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. MasterCard 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 (欺骗).?

  Ask about your credit-card firm’s on-line rules: Under British law, cardholders have to pay the first US $78 of any fraudulent (欺骗性的) 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 https: // - the extra “s” stands for secure. If in doubt, give your credit-card information over the telephone.

  Keep your password(密码)safe: Most on-line sites require a user name and password before placing an order. Treat your passwords with care.? 

What is the meaning of “fraud”??

A. Cheating.    B. Sale.     C. Payment.    D. Safety.?  

How can the thieves get the information of the credit card??

A. The customers give them the information.?

B. The thieves steal the information from Web sites.?

C. The customers sell the information to them.?

D. The thieves buy the information from credit card firms.?   

How many pieces of advice does the passage give to you??

A. Four.      B. Three.     C. Five.     D. Six.

You are shopping on the site: http: // www. Shopping. com, and you want to buy a TV set, what does this article suggest to do??

A. Order the TV set at once. ? 

B. Do not buy the TV set on this site.?

C. E-mail the site your credit-card information.?

D. Tell the site your password and buy the TV set for you.?

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