When a Swedish ship that sank in 1628 was recovered from the port of Stockholm, historians and scientists were overjoyed with the chance to examine the remains of the past. The ship construction showed how ships were built and operated during the seventeenth century. In this way, artifacts, objects made by human beings, provided a picture of daily life almost 400 years ago.
Underwater archaeology-the study of ships, aircraft and human settlements that have sunk under large bodies of water-is really a product of the last 50 years. The rapid growth of this new area of study has occurred because of the invention of better diving equipment .Besides the Swedish ship wreck(残骸),underwater archaeologists have made more exciting discoveries such as the 5000-year-old boats in the Mediterranean Sea.
Underwater archaeology can provide facts about the past. In ancient ports all over the world are ships sunken in the past 6,000 years. There are also sunken settlements in seas and lakes telling of people’s way of life and their systems of trade in ancient times. Underwater archaeologists want to study these objects to add to the world's knowledge of history, but they have to fight two enemies. One enemy is treasure hunters who dive for ancient artifacts that they can sell to collectors. Once sold, these objects are lost to experts. The second enemy is dredging machines(挖掘机)often used to repair ports. These machines destroy wrecks and artifacts or bury them deeper under sand and mud. By teaching the public about the importance of underwater “museums” of the past, archaeologists are hoping to get support for laws to protect underwater treasures.What purpose does Paragraph 1 serve in the passage?
A.To provide background information of the topic |
B.To attract readers' attention to the topic |
C.To use an example to support the topic |
D.To offer basic knowledge of the topic |
The aim of underwater archaeology is to _____.
A.exploit water bodies | B.search for underwater life |
C.study underwater artifacts | D.examine underwater environment |
Underwater archaeologists are worried because_____.
A.sea hunters have better diving equipment |
B.their knowledge of world history is limited |
C.dredging machines cause damage to the ports |
D.sold artifacts can hardly be regained for research |
What is the main purpose of the passage?
A.To introduce a young branch of learning. |
B.To discuss the scientists’ problems. |
C.To explain people’s way of life in the past. |
D.To describe the sunken ships. |
Preparing for a medical emergency involving your pet is always best accomplished before the event takes place. This series is designed to help guide you through the important decisions about first aid, as well as how and when to transport your pet quickly and
safely to a veterinary hospital or emergency ability.
VeterinaryPartner.com has provided this complete reference book online for you to skim through, expanding your knowledge of dog and cat first aid;however, we encourage you to buy the book to keep in your home or car as a quick reference during an emergency.
This book is an emergency preparedness ready-reference for dogs and cats.Wise preventive measures, intelligent use of first aid principles, coupled with recognition of abnormal symptoms and treatment of disorders, diseases, and problems, lead to effective health care.
A working knowledge of this information will help you get rid of some potentially dangerous circumstances and help you prepare for emergency situations.
It includes information on what to do and what not to do in specific emergency situations.The authors encourage careful reading and occasional rereading.We have tried to make this book easy to understand, avoiding technical terms as often as possible, but defining(下定义)them in context when they are necessary.What does the underlined word “veterinary” in paragraph 1 mean?
A.Immediate | B.For animals | C.Urgent | D.For humans |
Why are we advised to buy the book?
A.Because it's very cheap and may be useful to all the people. |
B.Because it contains a working knowledge of information about dogs and cats. |
C.Because it contains information on specific emergency situations. |
D.Because it is convenient to know things dealing with dog or cat in an emergency. |
Which is NOT true about the book?
A.It can enlarge the readers' knowledge of dog and cat first aid. |
B.It contains the knowledge of recognition of abnormal symptoms of dogs and cats. |
C.Although it contains many technical terms, it is easy to understand. |
D.You can read it on VetrinaryParmer.com free of charge. |
What's the purpose of the passage?
A.To introduce a book. | B.To introduce a website. |
C.To introduce a working knowledge. | D.To encourage careful reading. |
Broken rubber bands and flat tires requiring replacement could soon be a thing of the past.
French researchers have developed a new kind of rubber that can repair itself when broken.The new rubber is made from widely available materials including vegetable oil and a common industrial chemical.All the materials are considered safe to the environment and can be easily reused.
The best part is that the new rubber can be repaired and used again and again without losing its strength or ability or stretch.When cut, the rubber can be made new again, simply by pressing the two broken ends back together.
The product can be repaired at room temperature, around twenty degrees Centigrade;other self-healing materials require higher temperatures for repair.
Traditionally, rubber substances are made from huge molecules(分子)connected by strong chemical links, or bonds.The new rubber is made of smaller molecules.The molecules are linked together using hydrogen bonds.When connected in this way, the molecules act like one long molecule, forming what is called supramolecular networks(超分子网).When the rubber is cut, the molecules attempt to connect with whatever molecule is near them.When pressed together, the molecules are able to repair themselves at the molecular level, making the repaired rubber like new.
However, time is an important element in the process.If the broken ends are not brought together quickly, a repair is not possible.This is because molecules will form bonds with molecules on their own side.The inventors say the surfaces of the rubber can be repaired within a week of being separated.
The rubber is the creation of scientists at the Industrial Physics and Chemistry Higher Education Institution in Paris.The organization is part of France's National Center for Scientific Research.The new material is described in greater detail in the research publication Nature.
According to the introduction, which of the following is NOT the advantage of the new rubber?
A.It can be made as easily as common rubber. |
B.It is environmentally-friendly. |
C.It can repair itself at room temperature. |
D.It is made of smaller molecules. |
What does the 5th paragraph mainly tell us?
A.Why t![]() |
B.Why the new rubber can repair itself. |
C.The new rubber is made from huge molecules. |
D.The new rubber is different from the common rubber. |
If we want to know more about the technology of this kind of new rubber, where can we get the information?
A.In the researchers' diary. | B.In a guide book. |
C.In a research magazine. | D.In a newspaper. |
Dear sir,
I read your story (of the 4th February) about the cost of living in the country rather than in the town, and I agree with most of the points that you made. My husband and I lived in the middle of Horlton until two years ago — a seaside town of nearly five hundred thousand people. When my husband stopped working, we moved to our present house in a small village at the foot of Roland Hill, and there is no doubt that our costs are higher now.
I have to do my shopping in small shops, where the food is more expensive than in city supermarkets; it costs more to travel by bus; and because the men who come to mend the television or the washing machine, have to come farther, we have to pay them more.
But it does not cost us much to enjoy what is beautiful in the country; and peace and quiet are cheap. Many people spend a great deal of time and money driving into the country to enjoy the simple things of life; yet we can enjoy them just by going out of the front door. It costs more to live here than it did in Horlton but now life really is worth living.
Yours faithfully.
Edith Randall What do you know about Horlton?
A.A quiet town not far from the sea. |
B.A middle-sized town until two years ago. |
C.A town with a population of nearly half a million. |
D.A small village at the foot of Roland Hill |
What Mrs Randall really wants to express in the letter is that _____.
A.it cost less to live in the country |
B.it costs more to live in the country |
C.living in the country is no better than in the town |
D.she is quite satisfied with the life in the country |
One can probably find this letter in _____.
A.a guidebook | B.a newspaper | C.a speech | D.a story book |
According to the passage, which of the following is true?
A.The letter is written by an unknown person. |
B.This letter is a reply to the questions of 4th February. |
C.Living in the country is better than living in the city. |
D.The cost of li![]() |
Most British telephone cards are just plain green, but card collecting is becoming a popular hobby in Britain and collectors even have their own magazine, International Telephone Cards. One reason for their interest is that cards from around the world come in a wide variety of different and often very attractive designs. There are 100, 000 different cards in Japan alone, and there you can put your own design onto a blank card simply by using a photograph or a business card.
The first telephone cards, produced in 1976, were Italian. Five years later the first British card appeared, and now you can buy cards in more than a hundred countries. People usually start collecting cards because they are attractive, small and light , and they do not need much space. It is also a cheap hobby for beginners, although for some people it becomes a serious business. In Paris, for example, there is a market where you can buy only telephone cards, and some French cards cost up to 4, 000 pounds. The first Japanese card has a value of about 28, 000 pounds. Most people only see cards with prices like these in their collectors magazine.The text is mainly about ________ .
A.the history of phone cards | B.phone card collecting as a hobby |
C.reason for phone card collecting | D.the great variety of phone cards |
When did people in Britain begin to use phone cards?
A.In 1971. | B.In 1975. | C.In 1976. | D.In 1981. |
The main reason for most people to collect phone cards is that ________ .
A.they find the cards beautiful and easy to keep |
B.they like to have something from different countries |
C.they want to make money with cards |
D.they think the cards are convenient to use |
The writer mentions a market in Paris in order to show that ________
A.card collecting is popular among young people |
B.French and Japanese cards are the most valuable |
C.people can make money out of card collecting |
D.card collectors magazines are very useful |
Justin Young is a _______.
A.TV reporter | B.popular singer | C.song writer | D.radio reporter |
Which song does NOT change its place this week?
A.Are You There? | B.The Bees. | C.Say Cheese. | D.Perhaps. |
How many songs listed above are new this week?
A.One.![]() |
B.Two. | C.Three. | D.Four. |
Which of the following is NOT true according to the passage?
A.You can listen to Music Ground once a week. |
B.Justin Young is talking about popular songs this week. |
C.People can call in to listen to their favorite songs. |
D.Stupid Machine is now in the radio station with OK Band. |