单选题 Dollars and cents are the basic units of American money. The back of all dollar bills are green (hence 'greenbacks'). The commonly used coins are: one cent (penny), five cents (nickel), 10 cents (dime), and 25 cents (quarter). 50 pieces (half dollar) and silver dollars (not really silver anymore) are gaining in usage, while there has been talk of phasing out the penny that's inflation for you. 'Always carry plenty of quarters when travelling. Very useful for phones, soda machines, laundry machines, etc.' There is generally no problem in using US dollars in Canada, but this is never possible in reverse. It's useful always to carry small change for things like exact fare buses, but do not carry large sums of cash. Instead keep the bulk of your money in travellers' cheques which can be purchased both in the US and abroad and should be in dollar denominations. The best known cheques are those of American Express, so you will have the least difficulty cashing these, even in out of the way places. Thomas Cook travellers' cheques are also acceptable, especially as lost ones can be reclaimed at some car rental companies. Dollar denomination cheques can be used like regular money. There's no need to cash them at a bank: use them instead to pay for meals, supermarket purchases or whatever. Ten or twenty dollar cheques are accepted like this almost always and you'll be given change just as though you'd presented the cashier with dollar bills. Be prepared to show ID when you cash your cheques. Credit cards can be even more valuable than travellers' cheques, as they are often used to guaraniee room reservations over the phone and are accepted in lieu of deposit when renting a car—indeed without a credit card you may be considered so untrustworthy that not only a deposit but your passport will be held as security too. The major credit cards are VISA, Master Charge and Access, Diners Club and American Express. If you hold a bank card, it could well be worthwhile to increase your credit limit for travel purposes—you should ask your bank manager.
单选题 It ______ that 200 people died and over 5,000 lost their shelters after the flood.
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单选题 Every year gray whales migrate from the Bering Sea in Alaska to the Baja Peninsula in Mexico. Eleven gray whales have died in the San Francisco Bay in the last three weeks. No one knows why the whales are dying. Last year 270 whales died along the whales' migration route. Many people think starvation is the cause. This year the dead whales seem to have more blubber (fat) on them. Twenty years ago, the gray whale was listed as an endangered species. Some scientists think that the larger number of whales makes it hard to find enough food. More whales create more pressure on the food supply, a supply that some scientists say may have dwindled as a result of the warm waters of E1 Nino. Most of the whales have been dead for many days before they are found and studied. This makes it hard to find the reason for death. 65 whales have been seen in the San Francisco Bay Area this year compared to 17 last year. The whales could be dying from many diseases, but it may be over-population.
单选题 June came and the hay (干草) was almost ready for cutting. On Midsummer's Eve, which was a Saturday, Mr. Jones went into Willington and got so drunk at the Red Lion that he did not come back until midday on Sunday. His men had milked the cows in the early morning and then had gone out chatting without bothering to feed the animals. When Mr. Jones got back, he immediately went to sleep on the living-room sofa with the 'News of the World' over his face. When evening came, the animals were still not fed. At last, they could stand no longer. One of the cows broke into the door of the storehouse with her horns and all the animals began to help themselves to the grains. It was just then that Mr. Jones woke up. The next moment he and his four men were in the storehouse with whips in their hands, whipping in all directions. This was more than the hungry animals would bear. Together though nothing of the kind had been planned beforehand they jumped upon their masters. Mr. Jones and his men suddenly found themselves being struck with the horns and kicked from all sides. The situation was quite out of their control They had never seen these animals act like this before. This sudden rebellion of the creatures, which they were used to beating and whipping just as they chose, frightened them. After only a moment or two, they gave up trying to defend themselves. A minute later all five of them were in full fright down the road with the animals running after them joyfully.
单选题 Can animals be made to work for us? Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings. They point out that at a circus, for example, we may see elephants, monkeys, dogs and other animals doing quite skillful things. Perhaps you have seen them on the television or in a film. If you watch closely, you may notice that the trainer always gives the animal a piece of candy or a piece of fruit as a reward. The scientists say that many different animals may be trained to do a number of simple jobs if they know they will get a reward for doing them. Of course, as we know, dogs can be used to guard a house, and soldiers in both old and modem times have used geese to give warning by making a lot of noise when a stranger or an enemy comes near. But it may be possible to train animals to work in factories. In Russia, for example, pigeons which are birds with good eyesight, are being used to watch out for faults in small steel balls that are being made in one factory. When the pigeon sees a ball which looks different from others, it touches a steel plate with its beak. This turns on a light to warn people in the factory. At the same time a few seeds are given as a reward. It takes three to five weeks to train a pigeon to do this and one pigeon can inspect 3000 to 4000 balls an hour. Apes have been used in America in helping to make cars, and scientists believe that these large monkeys may be one day gather crops and even drive trains.
单选题 It is a process during ______ the body releases water to cool the skin.
单选题 The treaty was made to protect the country ______ invasion by its neighbours.
单选题 I've already decided. I ______ buy a new car.
单选题 The ______ problem of bringing a space-ship back from the moon has been solved.
单选题 Copernicus was born in Torun, Poland, on February 19, 1473. Little is known about his early life except that his father died when he was 10. An uncle adopted him, his two sisters, and his brother. The uncle saw to it that the two boys received a good education. Copernicus went to the University of Cracow. There he studied such subjects as Latin, mathematics, and astronomy. It was probably at that time that he changed his Polish name, Niklas Koppernigk, to the Latin form of Nicolaus Copernicus. In 1496 Copernicus went to Italy, where he spent the next 10 years studying at various universities. In Copernicus' time people still believed that all things—the sun, the stars, and the planets moved around the earth. It was an old belief that few men had ever questioned. Aristotle had based his theory of astronomy on this belief. Because the Church had long been the center of learning, the theory was also linked to religious beliefs. In 1506 Copernicus returned to his homeland. A few years later he began to work for the Church. All those years Copernicus carried on his work in astronomy. He had just the most basic equipment and, like other scientists of his day, made observations with only his eyes. Still, using mathematics and logic, Copernicus worked out a different theory, which held that the planets went around the sun. Copernicus did not announce his ideas. He did not want to make trouble. But he could not hide the scientific truth. So he talked about his theory with his friends, who strongly advised him to have his work published. His great book, On the Revolutions of the Heavenly Bodies, appeared at the very end of his life. Copernicus saw the first copy on the day he died, May 24, 1543.
单选题Scientists who study the brain have found out a great deal about how we learn.They have_____21_____that babies learn much more from the sights and sounds around them than we_____22_____before.You can?
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单选题 To travel from England to Scotland you ______ a passport.
单选题 Fu Lei is known for his ______ of music and knowledge on philosophy.
单选题 Love is a wondrous state, deep, tender, and rewarding. Because of its intimate and personal nature, it is regarded by some as an improper topic for experimental research. But, whatever our personal feelings may be, our assigned mission as psychologists is to analyze all facets (方面) of human and animal behavior into their component variables. So far as love or affection is concerned, psychologists have failed in this mission. The little we know about love does not transcend simple observation, and the little we write about it has been written better by poets and novelists. But of greater concern is the fact that psychologists tend to give progressively less attention to a motive which pervades our entire lives. Psychologists, at least psychologists who write textbooks, not only show no interest in the origin and development of love or affection, but they seem to be unaware of its very existence. The apparent repression of love by modern psychologists stands in sharp contrast with the attitude taken by many famous and normal people. The word 'love' has the highest reference frequency of any word cited in Bartlett's Book of Familiar Quotations. It would appear that this emotion has long had a vast interest and fascination for human beings, regardless of the attitude taken by psychologists; but the quotations cited, even by famous and normal people, have a mundane redundancy. These authors and authorities have stolen love from the child and infant and made it the exclusive property of the adolescent and adult.
单选题 What a lovely day, ______?
单选题 ______, he never takes anything from his neighbors.