单选题All theories ______ from practice and m turn serve practice. A. originate B. restrain C. modify D. reflect

单选题There is hope for the 21st century if women can

单选题The 1990s have been designated the Decade Against Drug Abuse by the United Nations. But, (1) less than three years to go before the end of the decade, governments and health organizations (2) that they have made (3) progress in reducing drug, alcohol and tobacco abuse. Today, consumption of all these substances is increasingly steadily worldwide. (4) every country now has problems with (5) drugs. And the world is producing and consuming more alcohol and tobacco than ever. Between 1970 and 1990 beer production (6) rose by over 80 per cent. And, (7) the number of smokers keeps on (8) ,by the second or third (9) of the next century there could be 10 million deaths each year (10) smoking related illnesses. Drugs are also a huge burden (11) the world economy. In the United States, for example, it's estimated that alcohol and illegal drug use costs the country tens of billions of dollars each year, mainly (12) health care. When the cost of tobacco related illnesses is added, (13) total more than doubles. Drugs are also closely (14) crime. Many police forces no longer (15) between illegal and legal drugs when fighting crime. In Australia, for example, experts (16) that police in some parts of the country spend between 70 and 80 per cent of their time dealing with alcohol-related incidents. One explanation for the increase in drug (17) is simply that people have more money to spend. Tobacco and alcohol companies are now (18) much more on developing countries to take (19) of greater wealth there. And criminals involved in the illegal drug trade are following (20) ,introducing drugs into countries where they were previously hardly use.

单选题The American idea of customer is to make each customer the center of the attention. People going shopping in America can expect to be treated with respect from the very beginning. When a customer gets to the store, they are treated as honored guests. Customers don"t usually find store clerks sitting around watching TV or playing cards. Instead the clerks greet them warmly and offer to help them find what they want. In many stores, the signs that label each department make shopping a breeze(容易的事情). Customers usually don"t have to ask how mush items cost, since prices are clearly marked. When customers are ready to check out, they find the nearest and shortest checkout lane. But as Murphy"s Law would have it, whichever lane they get in, all the other lanes will move faster. Good stores open new checkout lanes when the lanes get too long. Some even offer express lanes for customers with 10 items or less. After they pay for their purchases, customers receive a smile and a warm "thank you" from the clerk. Many stores even allow customers to take their shopping carts out to the parking lot. That way, they don"t have to carry heavy bags out to the car. In America, customer service continues long after the sale. Many products come with a money back guarantee. If there is a problem with the product, customers can take it back. The customer service representative will often allow them to exchange the item or return it for a full refund.

单选题After the Arab states won independence, great emphasis was laid on expanding education, with girls as well as boys ______ to go to school.

单选题{{B}}Text 3{{/B}} If American investors have learned any lesson in the last 25 years, it is to buy shares on the dips. The slide in 2000--2002 may have been longer and deeper than they were used to but normal service was eventually resumed, driving the Dow Jones Industrial Average to a record high on October 1st. Among American financial commentators, it is almost universally accepted that shares always rise over the long run. And one ought to expect shares (which are risky) to deliver a higher return than risk free assets such as government bonds. Nevertheless, investors ought also to remember the world's second largest economy, Japan. Its most popular stock-market average, the Nikkei 225, peaked at 38,915 on the last trading day of the 1980s; this week, nearly 18 years later, it is still only around 17,000, less than half its peak. Buying on the dips did not work either. Professionals of the London Business School examined the record of 16 stock markets which were in continuous operation over the course of the 20th century. In itself, this selection showed survivorship bias by excluding the likes of Russia and China. The academies found that only three other countries could match the American record of having no 20-year periods with negative real returns. Other investors were far less lucky. Japanese, French, German and Spanish investors all suffered instances where they had to wait 50--60 years to earn a positive real return. It was no good following the famous advice to "put the shares in a drawer and forget about them"; the furniture would not have lasted that long. Besides survivorship bias, there is another problem with the belief that stock markets must always go up. Investors will keep buying until prices reach stratospheric(稳定的) levels. That clearly happened in Japan in the late 1980s, and after seven years, it is still not much more than half its peak level. A significant proportion of the return from equities in the second half of the 20(上标)th century came from a re-rating of shares; investors were willing to pay a higher multiple for profits. But re-rating cannot continue forever. If investors want a simple parallel with share prices, they need only mm to the American housing market. Back in 2005 an economic adviser to the president said," We've never had a decline in housing prices on a nationwide basis. What I think is more likely is that house prices will slow, maybe stabilize." Lots of people took the same view and were willing to borrow (and lend) on a vast scale on the grounds that higher house prices would always bail them out. They are now counting their losses. Investors in equities should beware of over-committing themselves on the basis of a similar belief Just ask the Japanese.

单选题Man: When are George's parents coming back? Woman: My sister says both she and George's father will stay on for the weekend since George is all right here with us. Question: What is the relationship between George and the woman?

单选题A______person is one who gives away money or things in large quantity.

单选题A: Well, you told me to soak it in hot water. B: ______I told you to dip it in warm water.

单选题He had always considered her an ideal ______ for his brother.

单选题{{B}}Text 4{{/B}} It looked just like another aircraft from the outside. The pilot told his young passengers that it was built in 1964. But appearances were deceptive, and the 13 students from Europe and the USA who boarded the aircraft were in for the flight of their lives. Inside, the area that normally had seats had become a long white tunnel. Heavily padded(填塞) from floor to ceiling, it looked a bit strange. There were almost no windows, but lights along the padded walls illuminated it. Most of the seats had been taken out, apart from a few at the back, where the young scientists quickly took their places with a look of fear. For 12 months, science students from across the continents had competed to win a place on the flight at the invitation of the European Space Agency. The challenge had been to suggest imaginative experiments to be conducted in weightless conditions. For the next two hours, the flight resembled that of an enormous bird which had lost its reason, shooting upwards towards the heavens before rushing towards Earth. The invention was to achieve weightlessness for a few seconds. The aircraft took off smoothly enough, but any feelings that I and the young scientists had that we were on anything like a scheduled passenger service were quickly dismissed when the pilot put the plane into a 45-degree climb which lasted around 20 seconds. Then the engines cut out and we became weightless. Everything became confused and left or right, up or down no longer had any meaning. After ten seconds of free-fall descent(下降) the pilot pulled the aircraft out of its nosedive. The return of gravity was less immediate than its loss, but was still sudden enough to ensure that some students came down with a bump. Each time the pilot cut the engines and we became weightless, a new team conducted its experiment. First it was the Dutch who wanted to discover how it is that cats always land on their feet. Then the German team who conducted a successful experiment on a traditional building method to see if it could be used for building a future space station The Americans had an idea to create solar sails that could be used by satellites. After two hours of going up and down in the lane doing their experiments, the predominant feeling was one of excitement rather than sickness. Most of the students thought it was an unforgettable experience and one they would be keen to repeat.

单选题 The war was the most peaceful period of my life. The window of my bedroom faced southeast. My mother had curtained it, but that had small effect. I always woke up with the first light and, with all the responsibilities of the previous day melted, felt myself rather like the sun, ready to shine and feel joy. Life never seemed so simple and clear and full of possibilities as then. I stuck my feet out under the sheets--I called them Mrs. Left and Mrs. Right--and invented dramatic situations for them in which they discussed the problems of the day. At least Mrs. Right did; she easily showed her feelings, but I didn't have the same control of Mrs. Left, so she mostly contented herself with nodding agreement. They discussed what Mother and I should do during the day, what Santa Claus should give a fellow for Christmas, and what steps should be taken to brighten the home. There was that little matter of the baby, for instance. Mother and I could never agree about that. Ours was the only house in the neighborhood without a new baby, and Mother said we couldn't afford one till Father came back from the war because it cost seventeen and six. That showed how foolish she was. The Geneys up the road had a baby, and everyone knew they couldn't afford seventeen and six. It was probably a cheap baby, and Mother wanted something really good, but I felt she was too hard to please. The Geneys' baby would have done us fine. Having settled my plans for the day, I got up, put a chair under my window, and lifted the frame high enough to stick out my head. The window overlooked the front gardens of the homes behind ours, and beyond these it looked over a deep valley to the tall, red-brick house up the opposite hillside, which were all still shadow, while those on our side of the valley were all lit up, though with long storage shadows that made them seem unfamiliar, stiff and painted. After that I went into Mother's room and climbed into the big bed. She woke and I began to tell her of my schemes. By this time, though I never seem to have noticed it, I was freezing in my nightshirt, but I warmed up as I talked until the last frost melted. I fell asleep beside her and woke again only when I heard her below in the kitchen, making breakfast.

单选题When a population doubles, the country involved needs twice as much of everything, including ______.

单选题______ how to operate a switchboard, I had to ask the office supervisor to show me the correct procedures.

单选题My friend Mike was shaking his head in disbelief. "That young woman who just waited on me," he said, pointing to an employee of the fast food restaurant where we were eating, "had to call someone over to help her count the change. The cash register (出纳机) showed her I need 99 cents, but she couldn't figure out how to count out the coins." I understood Mike's concern. What we have done in this country, although unintentionally, is to create several generations of individuals most of whom have no idea how to reason, how to do simple math, how to do research, or finally how to be creative. The reason for this is our overuse of information technology: video games, television, digital watches, calculators, and computers. Information technology feeds us information without requiring us to think about it and let us perform operations without understanding them. It is time for us to take a hard look at an educational system that only teaches our children how to push buttons. Our kids can't tell time if the clock hasn't hands. They can use calculators, but cannot add, subtract, divide or multiply. Video games have taken the place of active, imaginative play. Although most of them are technically literate, they choose not to read. They are so used to television and movies that they cannot use their imagination to stay interested in a book. It is not enough to recognize the problem. What we need is solution. The one I offer is simple to suggest, but may be impossible to carry out. We must unplug our children. If we don't, they will never learn how to solve problems. They will never learn basic reasoning skills and will certainly not develop creativity. Instead of filling classrooms with electronics, let's concentrate on good old-fashioned literacy—reading books. Students must be taught not only to perform computer operations, but to figure and reason for themselves. They must see how things work and how process leads to results, they must also stretch their imagination.

单选题If connection between two sensors is blocked, the network will automatically ______.

单选题Soil ______ is a natural process. It becomes a problem when human activity causes it to occur much faster than under natural conditions. A. preservation B. abrasion C. erosion D. eruption