单选题If we ______ our relations with that country, we'll have to find another supplier of raw materials. A. diffuse B. diminish C. terminate D. preclude

单选题The loss of lusitania and so many of its passengers, including 128 U.S. citizens, aroused a wave of indignation in the United States.

单选题Students should know better not______pets like dogs, cats and mice at dormitory.

单选题Scientists, like other people, are always pleased to have their own ideas ______.

单选题Despite his______appearance, he was chosen by his employer for a job that required neatness and polish.

单选题To solve such a difficult problem is really ______ my grasp.

单选题When I was still an architecture student, a teacher told me, "We learn more from buildings that fall down than from buildings that stand up." What he meant was that construction is as much the result of experience as of theory. Although structural design follows established formulas, the actual performance of a building is complicated by the passage of time, the behavior of users, the natural elements--and unnatural events. All are difficult to simulate. Buildings, unlike cars, can't be crash-tested. The first important lesson of the World Trade Center collapse is that tall buildings can withstand the impact of a large jetliner. The twin towers were supported by 59 perimeter columns on each side. Although about 30 of these columns, extending from four to six floors, were destroyed in each building by the impact, initially both towers remained standing. Even so, the death toll (代价) was about-2 245 people lost their lives. I was once asked, how tall buildings should be designed given what we'd learned from the World Trade Center collapse. My answer was, "Lower." The question of when a tall building becomes unsafe is easy to answer. Common aerial fire-fighting ladders in use today are 100 feet high and can reach to about the 10th floor; So fires in buildings up to 10 stories high can be fought from the exterior (外部). Fighting fires and evacuating occupants above that height depend on fire stairs. The taller the building, the longer it will take for firefighters to climb to the scene of the fire. So the simple answer to the safety question is "Lower than 10 stories." Then why don't cities impose lower height limits? A 60-story office building does not have six times as much rentable space as a 10-story building. However, all things being equal, such a building will produce four times more revenue and four times more in property taxes. So cutting building heights would mean cutting city budgets. The most important lesson of the World Trade Center collapse is not that we should stop building tall buildings but that we have misjudged their cost. We did the same thing when we underestimated the cost of hurtling along a highway in a steel box at 70 miles per hour. It took many years before seat belts, air hags, radial tires, and antilock brakes became commonplace. At first, cars simply were too slow to warrant concern. Later, manufacturers resisted these expensive devices, arguing that consumers would not pay for safety. Now we do-- willingly.

单选题The world's first internet ______ has been cancelled because of lack of interest.

单选题Parties are therefore free to strive for a settlement without {{U}}jeopardizing{{/U}} their chances for or in a trim if mediation is unsuccessful.

单选题Mrs. James______a divorce from her husband, for she can no longer______ his stormy temper.(北京大学2005年试题)

单选题Tim has failed three courses this semester, so he will have to ______ them next semester.

单选题As the sky lightened even more, they began to ______ their surroundings more clearly. A. fall out B. fall into C. makeup D. make out

单选题At first the university refused to purchase the telescope, but this decision was ______ revised. A. consecutively B. consequently C. successively D. subsequently

单选题The Association of University Teachers claims that taxpayers"money, ______ for basic research, is being used to prop up industrial and other applied research projects.

单选题She was pale with ______ after working for three shifts in succession.

单选题This discrepancy (was intriguing to) Alfred Wegener, a young geologist (working in) Greenland in 1910. He thought (the error) too great to be (accounted) easily.

单选题Experimenting with household objects can often get young people in trouble, but for one intelligent, inquisitive boy, it created the foundation of his future. Young Henry Ford discovered through his curious mind that many objects were useful for much more than their intended purposes. For example, he used to tinker with his father's fanning tools to see what they could do. He used his mother's darning needles to help him repair watches. And once, in an effort to study the power to steam, he sat and watched water boil in his mother's teapot. Little did Ford know that these experiments would lead him to creating a means of transportation that would change the world forever. Henry Ford was born on July 30, 1863, near Detroit, Michigan. He was the oldest of six children and the grandson of immigrants from Ireland who came to America in 1847. His family were farmers, and he grew up on the family farm where he began to develop mechanical skills. Through his experiences on the farm with his father, Henry developed a great curiosity about how things worked. When traveling in his father's wagon, Henry would often wonder if there were a faster and easier way to travel. A time he remembered for the rest of his life happened when he was only thirteen years old. He was riding in the wagon with his father, and he spotted a steam engine traveling along the road under its own power. Henry was so excited that he ran toward the engine and asked its driver question after question about the incredible machine. This machine was used for sawing wood and other tasks that required it to remain stationary, but the engine was mounted on wheels to propel itself from one location to another. Henry was so excited that the driver let him fire the engine and even run it. From that point on, Henry Ford's dream of creating a self-propelled vehicle began to materialize. Ford wanted to move to Detroit to work in the machine shops, but he stayed on the family farm until he was seventeen. At that time, he started his successful journey by moving to Detroit. He began working at the Michigan Car Company for $1.10 a day, but he was fired because he was faster than anyone else at making repairs. It took him only one hour to do what took others five hours to do! From there he took on a variety of different jobs but his dream continued to be the creation of a "horseless carriage." No matter where he worked, he continued to read about gas engines and experiment in his own workshop. In 1896 Ford's efforts began to pay off when he was working at the Detroit Edison Illuminating Company. His first self-propelled vehicle was ready for a try-out. As it started to run, it actually frightened the horses and caused many people to protest, but it ran. It was at the Detroit Edison Illuminating Company where Ford met Thomas Edison. Ford had always admired Thomas Edison's work and was excited when he discovered that Edison agreed that it had possibilities and encouraged him to continue. This gave Ford the incentive to invent an operable car that was written up in the Detroit Journal where he was described as a "mechanical engineer." Soon his work on automobiles caused him to have to leave the Detroit Edison Illuminating Company. Ford wanted more time to work on automobile building so he was forced to quit his job. Ford's dream began to materialize with his invention of automobiles and the development of the assembly line. His dream of creating a "motor car for the great multitude.., constructed of the best materials by the best men to be hired.., so low in price that no man making a good salary will be unable to own one..." came true with the invention of his ninth car, the Model T. It sold more than any other car for eighteen years between 1908 and 1926. This commonplace, hard working, sturdy car made up over one half of all the cars sold at this time. Today we are reminded of Ford's genius whenever we see one of his "horseless carriages" traveling across the many highways in our world. Who would have guessed for the world? The next time you see a child experimenting with different common objects, keep in mind that you may be witnessing the beginning of another great invention.

单选题When buying food, consumers are usually in a hurry, so they don't often______ descriptions for motivating them to make a choice.