题目内容

. The rocks are very big with _____ of colors on them.

   A. bands    B. marks    C. rails    D. shapes

 

A

练习册系列答案
相关题目

Although man has known asbestos for many hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H. W. Johns, owner of a New York City Supply Shop for roofers, was responsible for(对…负责) the opening of that first mine.

Mr. Johns was given a piece of asbestos which had been found in Italy. He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves, which looked much like ordinary work gloves, he took red-hot coals from the fireplace and played with them in his hands. How astonished the customers were to discover that he was not burned at all. You can well imagine that he had increasing business in asbestos roofing materials. However, because it was very expensive to transport (carry) them from Italy to the United States, Mr. Johns sent out a young scientist to seek a source nearer home. This young man found great vein(岩脉), in the province of Quebec in Canada.

Ever since 1881 Quebec has led the world in the production of this unusual mineral, which is made up of magnesium, silicon, iron, and oxygen. When it is mined, the asbestos is heavy, just as you would expect a mineral to be. When it is separated, a strange thing happens; the rock breaks down into fine, soft, soapy fibres(纤维).

Scientists do not know why the rock can be separated easily into threads(线), but they have found thousands of uses of this fireproof material, of the so-called “cloth of stone”.

Which title best expresses the main idea of this passage?

A. Asbestos mined in Canada        B. Fireproof matter

C. A “wonder” mineral                 D. A new roofing material

Johns proved his ability as a salesman by_______.

A. going into roofing business      B. carrying asbestos from Italy

C. sending a trained scientist         D. showing the use of asbestos gloves

Which is the most important character of asbestos that the author wants to show us?

A. It is like thread.               B. It feels soapy.

C. It burns easily.                 D. It is unusually heavy.

The author’s main purpose in writing this passage was to _______.

A. show the need for more scientists

B. compare asbestos with other minerals

C. increase the sales of asbestos

D. present facts about asbestos

Erik Weihenmayer was born with an eye disorder. As a child his  eyesight became worse and then, at the age of 13, he lost his sight  completely. However, he did not lose his determination to lead a  full and active life  Erik became an adventurer. He took up parachuting, wrestling and scuba diving. He competed in long-distance biking, marathons and  skiing. His favorite sport, thought, is mountaineering.  As a young man, Erik started to climb mountains. He reached the summit of Mount McKinley in 1995 and then climbed the dangerous  1000-metre rock wall of EI Capitan. Two years later, while climbing   Mount Kilimanjaro in Kenya with his girlfriend, they stopped for a  time at 13,000 feet above sea level－in order to get married. In 1999, he climbed Aconcagua, the tallest mountain in South America.  And then , on May 25, 2001, at the age of 33, Erik successfully completed the greatest mountaineering challenge of all. He climbed Mount Everest, the highest mountain in the world. Erik invented his own method for climbing mountains. He carries two long poles: one to lean on and the other to test the way ahead of  him. The climber in front of him wears a bell to guide him. Erik is  a good team member. He does his share of the job, such as setting up tents and building snow walls.  Although he could not enjoy the view, Erik felt the excitement of  being on the summit of Everest. He hopes that his success will change how people think about the blind. “When people think about a  blind person or blindness, now they will think about a person standing on the top of the world.

When was Erik born?

A. In 1967.        B. In 1995.       C. In 1968..         D. In 1969.

What was unusual about his wedding?

A. He got married on the summit of Mount McKinley.

B. He got married when climbing Mount Everest.

C. His wedding was held at 13,000 feet above sea level

D. His wedding was held after he prepared a lot.

What is Erik’s special method for climbing a mountain?

A. He takes his girlfriend with him.  B. He uses two long poles to help himself

C. He does his share of  the jobs.　  D. He keeps a good team around him.

Which of the following shows the right order of what happened?

a. He topped Mount McKinley.

b. He became blind.

c. He challenged Mount Everest.

d. He reached the peak of Kilimanjaro.

e. He climbed the rock wall of EI Capitan.

A. b a e d c 　　 B. b e d c a　      C. a b e d c 　     D. b a c d e


Deserts are found where there is little rainfall or where rain for a whole year falls in only a few weeks' time. Ten inches of rain may be enough for many plants to survive if the rain is spread throughout the year, If it falls, within one or two months and the rest of the year is dry, those plants may die and a desert may form.   
Sand begins as tiny pieces of rock that get smaller and smaller as wind and weather wear them down. Sand dunes (沙丘) are formed as winds move the sand across the desert. Bit by bit, the dunes grow over the years, always moving with the winds and changing the shape. Most of them are only a few feet tall, but they can grow to be several hundred feet high.
There is, however, much more to a desert than sand. In the deserts of the southwestern United States, cliffs (悬崖) and deep valleys were formed from thick mud that once lay beneath a sea more than millions of years ago. Over the centuries, the water dried up. Wind, sand, rain, heat and cold all wore away at the remaining rocks. The faces of the desert mountains are always changing –-very, very slowly ---as these forces of nature continue to work on the rock.
Most deserts have a surprising variety of life. There are plants, animals and insects that :have adapted to life in the desert. During the heat of the day' a visitor may see very few signs of living things, but as the air begins to cool in the evening, the desert comes to life. As the sun begins to rise again in the sky, the desert once again becomes quiet and lonely.
68. Many plants may survive in deserts when__________________.
A. the rain is spread out in a year      B. the rain falls only in a few weeks
C. there is little rain in a year         D. it is dry all the year round
69. Sand dunes are formed when___________________.
A. sand piles up gradually             B. there is plenty of rain in a year
C. the sea has dried up over the years    D. pieces of rock get smaller
70. The underlined sentence in the third paragraph probably means that in a desert there is____________.
A. too much sand              B. more sand than before
C. nothing except sand          D. something else besides sand
71. It can be learned from the text that in a desert____________.
A. there is no rainfall throughout the year               B. life exists in rough conditions
C. all sand dunes are a few feet high              D. rocks are worn away only by wind and heat

Dogs have an understanding of fair play and become angry if they feel that another dog is getting a better deal, a new study has found.
The study looked at how dogs react when a companion is rewarded for the same trick in an unequal way. Friederike Range, a famous researcher, and her colleagues did a series of experiments with dogs who knew how to respond to the command “give the paw”. The dogs were normally happy to repeatedly give the paw, whether they got a reward or not.
But that changed if they saw that another dog was being rewarded with a piece of food, while they received nothing. The dogs hesitated significantly longer when obeying the command to give the paw. Eventually, the unrewarded dogs stopped cooperating.
Researchers always assumed that only humans pay close attention to unfairness. That changed in 2003 when Frans De Waal, a professor of psychology, and a colleague named Sarah Brosnan did a survey on monkeys. Monkeys had to hand a small rock to researchers to get a piece of cucumber(黄瓜) in return. However, the monkeys would suddenly become angry when receiving the piece of cucumber if they saw another monkey receive a more delicious reward, such as a grape, for doing the same job. The monkey that got the cucumber would eventually throw away the food and the rock, and would later just stop performing.
In that experiment, the monkeys considered the fairness of two different types of payment, but when Range and her colleagues did a similar study with their trained dogs, testing to see if dogs would become upset if they only got bread when other dogs received sausage, they found that dogs did not make that kind of subtle (细微的) distinction. As long as the dogs got some kind of food payment, even if it wasn’t the most delicious kind, they would play along.
【小题1】 The dogs refused to give their paws when they _____________________.

A．were given too much reward
B．realized they received less food
C．found another dog was given nothing
D．felt they were being treated unequally
【小题2】The underlined word “that” in Paragraph 3 probably refers to “__________________”.
A．the dogs obeyed the command happily
B．the dogs waited for a reward
C．the dogs hesitated to give the paw
D．the dogs stopped cooperating
【小题3】The monkeys would become angry if they found _____________________.
A．they were being given the same type of food
B．another monkey did much less work
C．another monkey was offered tastier food
D．other monkeys threw food and rocks
【小题4】 Range finds that, compared with monkeys, dogs __________________.
A．enjoy playing interesting games with humans
B．prefer to do the same jobs as humans
C．pay little attention to the type of reward received
D．aren’t sensitive to the stimulation (刺激) of food


Let's pretend we're sailing down the Rhine River on a pleasure boat. The Rhine is one of the main waterways of Germany, and the river traffic is heavy. It's interesting to watch the many boats going up and down the river. But the river traffic is not nearly so interesting as the beautiful scenery along the banks and hillsides. The boat is passing many old castles. We can see people working in the vineyards (葡萄园) on the hillsides. There are vineyards as far as the eye can see. Wine from the Rhine Valley is famous all over the world.
Suddenly our boat slows down and begins to turn a little. We are coming to a sharp bend in the river. On our right we can see a rocky cliff over 400 feet high. At first it looks quite ordinary, but there is nothing ordinary about it. There are many stories, poems, and songs about the cliff. We are looking at the Lorelei.
The someone on the boat begins to sing in German, the song of the Lorelei. It is a song about a beautiful siren (美女) who has lured many sailors to their deaths.
The siren is supposed to sit on the rock combing her long golden hair and singing. The sailors who hear her forget to steer, and the current of river hurls their boats on the rocks and dashes them to pieces.
Soon other people on the boat begin to sing. The beautiful song adds to special magic to the moment, and you begin to realize why so many people have made this trip down the Rhine to see the rock of the Lorelei.
1.The more interesting thing to those who are sailing down the Rhine River on a pleasure boat is      .
A. to watch many boats going up and down the river
B. to see the beautiful scenery along the banks and hillsides
C. to hear a song about beautiful siren
D. to see a beautiful siren combing her golden hair
2. Which of the following is famous all over the world?
A. The Rhine River.                   B. The River Traffic.
C. Wine from the Rhine Valley.          D. The Lorelei.
3. We can see a rocky cliff over 400 feet high      .
A. on our right when coming to a sharp bend       B. on the Rhine hillsides
C. from the Rhine Valley                 D. on the boat
4. The song of the Lorelei is about      .
A. The Rhine wine                   
B. a rocky cliff
C. the beautiful scenery along the Rhine River 
D. a beautiful and dangerous woman genie

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网