单选题Students are preferred to foster a reading habit during their childhood.A. teachB. includeC. exploreD. cultivate

单选题I was shocked when I saw the size of the telephone bill.

单选题Clearly, he will win the game.A. likelyB. possiblyC. obviouslyD. strangely

单选题In the process, the light energy converts to heat energy.

单选题The {{U}}last{{/U}} few weeks have been enjoyable.

单选题A small number of firms have ceased trading.

单选题I want to provide my boys with a decent education.A. specialB. privateC. generalD. good

单选题Some birds consistently return to the same nesting area each spring.

单选题A crowd gathered to see what had happened.

单选题Earth Rocks on Most of the time, the ground feels solid beneath our feet. That"s comforting. But it"s also misleading because there"s actually a lot going on underground. Masses of land (called plates) slip, slide, and bump against each other, slowly changing the shape of continents and oceans over millions and billions of years. Scientists know that Earth formed about 4.5 billion years ago. They also know that our planet was hot at first. As it cooled, its outermost layer, called the crust(地壳), eventually formed moving plates. Exactly when this shift happened, however, is an open question. Now, an international group of researchers has an answer. They"ve found new evidence suggesting that Earth"s crust started shifting at least 3.8 billion years ago. The new estimate is 1.3 billion years earlier than previous ones. Not long before 3.8 billion years ago, lots of asteroids (小行星) were hitting Earth, keeping its crust in a hot, melted state. After the hard crust formed, much of it sank at various times into the planet"s hot insides. There, it melted before returning to the surface. In some places, however, the crust never sank. One of the oldest such places is in Greenland, in an area called the Isua supracrustal (上地壳) belt. The rocky crust there is between 3.7 and 3.8 billion years old. The belt was once part of the seafloor, but now it is exposed to air. The researchers recently took a close look at the Isua supracrustal belt. They noticed long, parallel cracks in the rock that have been filled in with a type of volcanic rock. To explain this structure, the scientists propose that tension in the crust caused the seafloor to crack open long ago. Hot, liquid rock, called magma(岩浆), flowed up slowly from deep inside Earth to fill the cracks. Finally, the whole area cooled, forming what we see today. That explanation, plus chemical clues inside the rock, suggests that the Isua supracrustal belt was once part of a plate under the ocean, beginning around 3.8 billion years ago.

单选题Conserve Electricity You probably don't even realize it, but an energy thief is inside your home at this very moment. This thief is silent and unseen, and he's picking your pocket. His name is "standby power." Standby power is the name given to the electricity used to power electrical appliances and devices even when they are turned off. But how can this be? Isn't an appliance "off" when you switch it off? Not necessarily. Many electronic devices consume electricity 24 hours a day just to stay warmed up for whenever you decide to use them. "Instant on" TV sets are one example. Whether you watch TV seven hours a day or not at all, the TV is always partially on, staying ready to flicker to life the moment you turn on its switch. Other devices that consume power constantly are those that have external or internal clocks: microwave ovens, computers, VCRs, DVD players, and cable TV and satellite TV boxes. Energy experts estimate that approximately 5 percent of residential electrical power consumption in the United States is used for standby power. That's a lot of power plants running overtime just to keep our electronics warm and ready to go. Some of the most prevalent standby power devices are the large plug—in transformers that are used to step down power to cordless phones and answering machines. How much do these various devices consume? Not much; just a few watts, maybe 3 to 5 each. But multiply that number over a 24-hour day, times the 6 to 10 devices in a typical home, and the scope of the savings could be greater than it may seem.

单选题What makes the Englishman cautious, according to the passage?

单选题Moderate Earthquake Strikes England A moderate earthquake struck parts of southeast England on 28 April 2007, toppling chimneys from houses and rousing residents from their beds. Several thousand people were left without power in Kent County. One woman suffered minor head and neck injuries. "It felt as if the whole house was being slid across like a fun-fair ride," said the woman. The British Geological Survey said the 4.3-magnitude quake struck at 8:19 a. m. and was centered under the English Channel, about 8.5 miles south of Dover and near the entrance to the Channel Tunnel. Witnesses said cracks appeared in walls and chimneys collapsed across the county. Residents said the tremor had lasted for about 10 to 15 seconds. "I was lying in bed and it felt as if someone had just got up from bed next to me," said Hedrick van Eck, 27, of Canterbury about 60 miles southeast of London. "I then heard the sound of cracking, and it was getting heavier and heavier. It felt as if someone was at the end of my bed hopping up and down." There are thousands of moderate quakes on this scale around the world each year, but they are rare in Britain. The April 28 quake was the strongest in Britain since 2002 when a 4.8-magnitude quake struck the central England city of Birmingham. The country"s strongest earthquake took place in the North Sea in 1931, measuring 6.1 on the Richter scale. British Geological Survey scientist Roger Musson said the quake took place on 28 April in an area that had seen several of the biggest earthquakes ever to strike Britain, including one in 1580 that caused damage in London and was felt in France. Musson predicted that it was only a matter of time before another earthquake struck this part of England. However, people should not be scared too much by this prediction, Musson said, as the modern earthquake warning system of Britain should be able to detect a forthcoming quake and announce it several hours before it takes place. This would allow time for people to evacuate and reduce damage to the minimum.

单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 {{B}}Fermi Problem{{/B}} On a Monday morning in July, the world’s first atom bomb exploded in the New Mexico desert. Forty seconds later, the shock waves reached the base camp where the Italian-American physicist Enrico Fermi and his team stood. After a mental calculation, Fermi announced to his team that the bomb’s energy had equated 10,000 tons of TNT. The bomb team was impressed, but not surprised. Fermi’s genius was known throughout the scientific world. In 1938 he had won a Nobel Prize. Four years later he produced the first nuclear chain reaction, leading us into the nuclear age. Since Fermi’s death in 1954, no physicist has been at once a master experimentalist and a leading theoretician. Like all virtuosos, Fermi had a distinctive style. He preferred the most direct route to an answer. He was very good at dividing difficult problems into small, manageable bits—talent we all can use in our daily lives. To develop this talent in his students. Fermi would suggest a type of question now known as a Fermi problem. Upon first hearing one of these, you haven’t the remotest notion of the answer, and you feel certain that too little information had been given to solve it. Yet when the problem is broken into sub-problems, each answerable without the help of experts or books, you can come close to the exact solution. Suppose you want to determine Earth’s circumference without looking it up. Everyone knows that New York and Los Angeles are about 3,000 miles apart and that the time difference between them is three hours. Three hours is one eighth of a day, and a day is the time it takes the planet to complete one rotation, so its circumference must be eight times 3,000 or 24,000 miles. This answer differs from the true value, 24,902.45 miles, by less than four percent. Ultimately the value of dealing with everyday problems the way Fermi did lies in the rewards of making independent discoveries and inventions: It doesn’t matter whether the discovery is as important as determining the power of an atom or as small as measuring the distance between New York and Los Angeles. Looking up the answer, or letting someone else find it, deprives you of the pleasure and pride that accompany creativity, and deprives you of an experience that builds up self-confidence. Thus, approaching personal dilemmas as Fermi problems can become a habit that enriches your life.

单选题I didn't have much confidence in my talent as a film actor.A. wisdomB. giftC. performanceD. show

单选题The National Trust The National Trust in Britain plays an increasingly important part in the preservation for public enjoyment of the best that is left unspoiled of the British countryside. Although the Trust has received practical and moral support from the Government, it is not a rich Government department. It is a voluntary association of people who care for the unspoiled countryside and historic buildings of Britain. It is charity which depends for its existence on voluntary support from members of the public. Its primary duty is to protect places of great natural beauty and places of historical interest. The attention of the public was first drawn to the dangers threatening the great old houses and castles of Britain by the death of Lord Lothian, who left his great seventeenth-century house to the Trust together with the 4,500-acre park and estate surrounding it. This gift attracted wide publicity and started the Trust"s "Country House Scheme". Under this scheme, with the help of the Government and the general public, the Trust has been able to save and make accessible to the public about one hundred and fifty of these old houses. Last year about one and three quarters of a million people paid to visit these historic houses, usually at a very small charge. In addition to country houses and open spaces the Trust now owns some examples of ancient wind and water mills, nature reserves, five hundred and forty farms and nearly two thousand five hundred cottages or small village houses, as well as some complete villages. In these villages no one is allowed to build, develop or disturb the old village environment in any way and all the houses are maintained in their original sixteenth-century style. Over four hundred thousand acres of coastline, woodland, and hill country are protected by the Trust and no development or disturbances of any kind are permitted. The public has free access to these areas and is only asked to respect the peace, beauty and wildlife. So it is that over the past eighty years the Trust has become a big and important organization and an essential and respected part of national life, preserving all that is of great natural beauty and of historical significance not only for future generations of Britons but also for the millions of tourists who each year invade Britain in search of a great historic and cultural heritage.

单选题Animal"s "Sixth Sense" A tsunami was triggered by an earthquake in the Indian Ocean in December, 2004. It killed tens of thousands of people in Asia and East Africa. Wild animals, 1 , seem to have escaped that terrible tsunami. This phenomenon adds weight to notions that they possess a "sixth sense" for 2 , experts said. Sri Lankan wildlife officials have said the giant waves that killed over 24,000 people along the Indian Ocean island"s coast clearly 3 wild beasts, with no dead animals found. "No elephants are dead, not 4 a dead rabbit. I think animals can 5 disaster. They have a sixth sense. They know when things are happening," H. D. Ratnayake, deputy director of Sri Lanka"s Wildlife Department, said about one month after the tsunami attack. The 6 washed floodwaters up to 2 miles inland at Yala National Park in the ravaged southeast, Sri Lanka s biggest wildlife 7 and home to hundreds of wild elephants and several leopards. "There has been a lot of 8 evidence about dogs barking or birds migrating before volcanic eruptions or earthquakes. But it has not been proven," said Matthew van Lierop, an animal behavior 9 at Johannesburg Zoo. "There have been no 10 studies because you can"t really test it in a lab or field setting," he told Reuters. Other authorities concurred with this 11 . "Wildlife seem to be able to pick up certain 12 , especially birds... there are many reports of birds detecting impending disasters," said Clive Walker, who has written Several books on African wildlife. Animals 13 rely on the known senses such as smell or hearing to avoid danger such as predators. The notion of an animal "sixth sense" — or 14 other mythical power is an enduring one which the evidence on Sri Lanka"s ravaged coast is likely to add to. The Romans saw owls 15 omens of impending disaster and many ancient cultures viewed elephants as sacred animals endowed with special power or attributes.

单选题You should have blended the butter with the sugar thoroughly.

单选题I was astonished at the news of his escape.

单选题The contempt he felt for his fellow students was obviousA. hateB. needC. loveD. pity