单选题I at last came to the realization that the problem could not be solved by the Umeans/U I had been using.

单选题There was no point ______ out until the storm had really stopped. A. in going B. by going C. of going D. to go

单选题Believe it or not, optical illusion (错觉) can cut highway crashes. Japan is a case in point. It has reduced automobile crashes on some roads by nearly 75 percent using a simple optical illusion. Bent stripes, called chevrons (人字形), painted on the roads make drivers think that they are driving faster than they really are, and thus drivers slow down. Now the American Automobile Association Foundation for Traffic Safety in Washington D.C. is planning to repeat Japan"s success. Starting next year, the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway crashes. Excessive speed plays a major role in as much as one fifth of all fatal traffic accidents, according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas where speed-related hazards are the greatest—curves, exit slopes, traffic circles, and bridges. Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half. However, traffic often returns to full speed within months as drivers become used to seeing the painted bars. Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane appear to be narrower. The result is a longer lasting reduction in highway speed and the number of traffic accidents. (227 words)

单选题The conservation mentioned in the passage includes the following EXCEPT ______.

单选题Directions: For each blank in the following passage, choose the best answer from the choices given below. Mark your answer on the Answer Sheet by drawing with a pencil a short bar across the corresponding letter in the brackets. Until recently most historians spoke very critically of the Industrial Revolution. They {{U}} {{U}} 1 {{/U}} {{/U}}that in the long run industrialization greatly raised the standard of living for the {{U}} {{U}} 2 {{/U}} {{/U}}man. But they insisted that its {{U}} {{U}} 3 {{/U}} {{/U}}results during the period from 1740 to 1840 were widespread poverty and misery for the {{U}} {{U}} 4 {{/U}} {{/U}}of the English population. {{U}} {{U}} 5 {{/U}} {{/U}}contrast, they saw in the preceding hundred years from 1640 to 1740, when England was still a {{U}} {{U}} 6 {{/U}} {{/U}}agricultural country, a period of great abundance and prosperity. This view, {{U}} {{U}} 7 {{/U}} {{/U}}, s generally thought to be wrong. Specialists {{U}} {{U}} 8 {{/U}} {{/U}}history and economics, have {{U}} {{U}} 9 {{/U}} {{/U}}two things: that the period from 1640 to 1740 was {{U}} {{U}} 10 {{/U}} {{/U}}by great poverty, and that industrialization certainly did not worsen and may have actually improved the conditions for the majority of the populace.

单选题我国明代乐律学家朱载培，是( )的首创者。

单选题 Why does cream go bad faster than butter? Some researchers think they know the answer, and it comes down to the structure of the food, not its chemical composition—a finding that could help rid some processed foods of chemical preservatives. Cream and butter contain pretty much the same substances, so why cream should sour much faster has been a mystery. Both are emulsions-tiny globules (小球) of one liquid evenly distributed throughout another. "The difference lies in what's in the globules and what's in the surrounding liquid", says Brocklehurst, who led the investigation. In cream, fatty globules drift about in a sea of water. In butter, globules of a watery solution are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the mixture. "This means that in cream, the bacteria are free to grow throughout the mixture", he says. When the situation is reversed, the bacteria are locked away in compartments (密封仓) buried deep in the sea of fat. Trapped in this way, individual colonies cannot spread and rapidly run out of nutrients. They also slowly poison themselves with their waste products. " In butter, you get a selflimiting system which stops the bacteria growing", says Brocklehurst. The researchers are already working with food companies keen to see if their products can be made resistant to bacterial attack through alterations to the food's structure. Brocklehurst believes it will be possible to make the emulsions used in salad cream, for instance, more like that in butter. The key will be to do this while keeping the salad cream liquid and not turning it into a solid lump.

单选题Mary: (after work) Shall I punch out for you, Juliet? I'm leaving now. Juliet: ______. I've to work overtime. A. Yes, thanks B. No, not necessary C. No, thanks D. I don't care

单选题 Niagara is an Indian word which means "roaring water", Indeed, the roar of the falling water of Niagara can be heard {{U}}(1) {{/U}} a distance of 5kms, Imagine {{U}}(2) {{/U}} of water flowing over a cliff 90 feet high and you will get an idea of that terrible noise. And {{U}}(3) {{/U}} tremendous power the Niagara River has! It moves big rocks about and throws them into the boiling water below. {{U}}(4) {{/U}} ago an old ship without single person on board was put in mid-stream. It sailed down the river {{U}}(5) {{/U}} a toy boat with great speed. Having reached the fall, the ship dropped into the boiling water, never {{U}}(6) {{/U}} again. There were some people who wanted to become famous {{U}}(7) {{/U}}, swimming across the most dangerous part of the Niagara River. One of them was Captain Webb who said that he would try to swim cross the Niagara, which {{U}}(8) {{/U}}crowds of people. On the evening of July 1st, 1893, Captain Webb came up to the river and {{U}}(9) {{/U}}a plunge. His having jumped into the water {{U}}(10) {{/U}} many people with horror. Soon, he appeared in the middle of the river. A loud shout went up from the crowd, but a moment later there was {{U}}(11) {{/U}} silence. The man had disappeared under the water, Thousands of eyes {{U}}(12) {{/U}} on the river, but the man was drowned. In 1902, a certain Miss Taylor decided to go over the falls in a barrel. There were different kinds of pillows inside the barrel to prevent her from {{U}}(13) {{/U}}. Having examined the barrel carefully, Miss Taylor got in. The barrel was closed and then {{U}}(14) {{/U}} into the water. Having reached the falls, it overturned and was shot down by the terrible {{U}}(15) {{/U}} of the water. When the barrel was finally caught and opened, Miss Taylor came out alive {{U}}(16) {{/U}} with a frightened look in her eyes. Once a crowd of visitors saw a rope {{U}}(17) {{/U}}over from one bank of the river to the other. Then they saw a man {{U}}(18) {{/U}} the rope. The man was an actor, Blondin {{U}}(19) {{/U}}. He managed to cross Niagara Falls on a tight rope. The people on the bank were surprised at his {{U}}(20) {{/U}} it so well.

单选题_________is known to all, good friends add happiness and value to each other's life.

单选题Blues Starting my own section of blues recommendation fills me with a creeping sense of guilt and complicity. Why? Because I"m a white guy writing about an almost completely black genre—black, at least, in its origins and in the artists that brought the blues of its zenith in the 50"s and 60"s. Unlike, say, jazz or soul, white performers played little or no positive role in the development of the blues. What positive effect whites had was far outweighed by the commercial exploitation and social exclusion blues pioneers met at every crossroads. Further, there have been absolutely no significant white blues performers. A few are only imitators. Most can"t even properly be called blues musicians: they played rock, folk, or pop music influenced by the blues, and much of it was unabashedly horrible. Mostly, though, writing about the blues makes me feel complicit in the unseemly, modern "blues revival", a movement almost completely white and unoriginal, a popular uprising of middle-class, middle-aged(usually drunk)white guys pretending that they know something about oppression, depravity, rebellion, and the contradictory celebration of life arises from those conditions. These things are the essence of the blues, and being a middle-class, middle-aged white guy, I can vouch that we know nearly nothing about them. So why am I here? Well, I can also vouch that the blues, like all music, is a universal language, and I have come to understand it academically, if not experientially. Eventually, I came to love blues music if only for its influence on music more akin to my world—rhythm and blues, soul, rock—but in its own right, too. In a general way, the blues speak to things we all have in common—love, betrayal, anger, death—and, from that perspective, I, too, got a right to sing the blues—just, well, not in public. On the other hand, as mentioned above, the blues world is now dominated by white folks. The records are made by white performers, many of them talented and certainly well-meaning but often sanitized and uninspired in ways anathema to the blues. White blues musicians frequently teeter on the precipice of caricature. Like Amos N" Andy, they trade in grossly rendered black mannerisms; that they do it out of love for the form rather than derision of the race seems a poor excuse. Sadly, though, most modern blues records—the good ones as well as the bad—are sold almost exclusively to white folks, too. The black audience for blues music has dwindled down to an older, mainly southern crowd of diehards. So, let"s be honest, I come to praise that original style. Indeed, in my research and writing, I hope to increase my own understanding appreciation for it. And, I hold no particular grudge against modern blues, though modern players will be few and far between among my recommendations. Mainly, I cannot ignore the fact that modern blues fans made rich men out of John Lee Hooker, B. B. King, Buddy Guy, and other deserving old masters. But, also, there are modern artists who have made great blues records. Many of these artists are from my home state of Texas, so it seems unpatriotic, if not dishonest, not to acknowledge this fact.

单选题Liquids are like solids ______ they have a definite volume. A. in that B. for that C. with that D. at that

单选题{{B}}Passage Three{{/B}} Within fifteen years Britain and other nations should be well on with the building of huge industrial complexes for the recycling of waste. The word rubbish could lose its meaning because everything that goes into the dumps would be made into something useful. Even the most dangerous and unpleasant wastes would provide energy if nothing else. The latest project is to take a city of around half a million inhabitants and discover exactly what raw materials go into it and what go out. The aim is to find out how much of these raw materials could be provided if a plant for recycling waste were built just outside the city. This plant would recycle not only metal such as steel, lead and copper, but also paper and rubber as well. Another new project is being set up to discover the best ways of sorting and separating the rubbish. When this project is complete, the rubbish will be processed like this: first, it will pass through sharp metal bars which will tear open the plastic bags in which rubbish is usually packed; then it will pass through a powerful fan to separate the lightest elements from the heavy solids; after that grounders and rollers break up everything that can be broken. Finally the rubbish will pass under magnets, which will remove the bits of iron and steel; the rubber and plastic will then be sorted out in the final stage. The first full scale giant recycling plants are, perhaps, fifteen years away. Indeed, with the growing cost of transporting rubbish to more distant dumps, some big cities will-be forced to build their own recycling plants before long.

单选题 Friction between America's military and its civilian overseers is nothing new. America's 220-year experiment in civilian control of the military is a recipe for friction. The nation's history has seen a series of shifts in decision-making power among the White House, the civilian secretaries and the uniformed elite(精英). However, what may seem on the outside an unstable and special system of power sharing has, without a doubt, been a key to two centuries of military success. In the infighting dates to the revolution, George Washington waged a continual struggle not just for money, but to control the actual battle plan. The framers of the Constitution sought to clarify things by making the president the "commander in chief". Not since Washington wore his uniform and led the troops across the Alleghenies to quell (镇压) the Whiskey Rebellion has a sitting president taken command in the field. Yet the absolute authority of the president ensures his direct command. The president was boss, and everyone in uniform knew it. In the Civil War, Abraham Lincoln dealt directly with his generals, and Secretary of War Edwin M. Stanton handled administrative details. Lincoln, inexperienced in military matters, initially deferred (顺从) to his generals. But when their caution proved disastrous, he issued his General War Order No. 1 -- explicitly commanding a general advance of all Union forces. Some generals, George B. McClellan in particular, bridled at his hands-on direction. But in constitutional terms, Lincoln was in the right. His most important decision was to put Ulysses S. Grant in charge of the Union Army in 1864. Left to its own timetable, the military establishment would never have touched Grant. The relationship between the president and his general provides a textbook lesson in civilian control and power sharing. Grant was a general who would take the fight to the enemy, and not second-guess the president's political decisions. Unlike McClellan, for example, Grant cooperated wholeheartedly in recruiting black soldiers. For his part, Lincoln did not meddle in operations and did not visit the headquarters in the field unless invited. The balance set up by Grant and Lincoln stayed more or less in place through World War I. Not until World War II did the pendulum finally swing back toward the White House. Franklin Roosevelt, who had been assistant Navy secretary during World War I, was as well prepared to be commander in chief as any wartime president since George Washington.

单选题Student A: ______ Student B: What's the problem? Student A: I switched on the power five minutes ago, and now it doesn't show up.

单选题 Directions: In this part there are three passages and one advertisement, each followed by questions or unfinished statements. For each of them, there are four choices marked A, B, C and D. Choose the best one and mark your answer on the ANSWER SHEET with a single line through the center.{{B}}11-15{{/B}} Communication is the sending of information or news from one person to another. If human beings could not communicate with one another, each person would have to learn everything for himself. Although animals as well as men can communicate, so far as we know, they can express only the simple emotions like pain, joy, fear, hunger, anger and love. Some animals have a more advanced form of language using sounds, and others use a wide range of sounds and face movements, but we still have much to learn about these animal languages. Speech is the most important means of communication between people. But it is not the only one. Nor is it the oldest. We use facial expressions, gestures and hand movements to express our feelings and to send signals to other people. Animals use this "body language" a great deal. The sign language used by deaf people is an example of communication without speech, while blind people communicate largely through touch and hearing.

单选题No one had told Smith about______a lecture the following day. A. there being B. there be C. there wouht be D. there was

单选题Wendy: Have you been to the new bakery on the comer?Arthur: No, how is it?Wendy: It is heaven ! ______!

单选题She doesn't think other species--let alone man--can survive unless they live with nature.

单选题Congress was then in session, and a fierce ______ was going on over ratification of the treaty.