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单选题Gunpowder was used extensively in firearms prior to 1990.
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单选题In judging our work you should take into consideration the fact that we have been very busy recently.
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单选题New Product Will Save Lives Drinking water that looks clean may still contain bugs, which can cause illness. A small company called Genera Technologies has produced a testing method in three stages, which shows whether water is safe. The new test shows if water needs chemicals added to it, to destroy anything harmful. It was invented by scientist Dr. Adrian Patton, who started Genera five years ago. He and his employees have developed the test together with a British water company. Andy Headland, Genera's marketing director, recently presented the test at a conference in the USA and forecast good American sales for it. Genera has already sold 11 of its tests at $42,500 a time in the UK and has a further four on order. It expects to sell another 25 tests before the end of March. The company says it is the only test in the UK to be approved by the government. Genera was formed five years ago and until October last year had only five employees; it now employs 14. Mr. Headland believes that the company should make around $19 million by the end of the year in the UK alone.
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单选题As a composer, pianist, and band leader, Duke Ellington was a key figure in the history of jazz (爵士) . A. lonely B. important C. musical D. royal
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单选题Hundreds of years ago, cloves were used to remedy headaches.
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单选题It is {{U}}highly{{/U}} unlikely that she will arrive today.
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单选题Who have the best chance of growing up successfully?
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单选题I’m sure I’ll able to Uamuse/U myself for a few hours.
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单选题The Difference between Man and Computer What makes people different from computer programs? What is the missing element that our theories don"t 1 account for? The answer is simple: People read newspaper stories for a reason: to learn more about 2 they are interested in. Computers, on the other hand, don"t. In fact, computers don"t even have interests; there is nothing 3 that they are trying to 4 when they read. If a computer program is to be a model of story understanding, it should also read for a " 5 ". Of course, people have several goals that do not make 6 to attribute to computers. One might read a restaurant guide in order to 7 hunger or entertainment goals, or to find a good place to go for a business lunch. Computers do not get 8 , and computers do not have business lunches. 9 , these physiological and social goals give 10 to several intellectual or cognitive goals. A goal to satisfy hunger gives rise to goals to find information about the name of a restaurant which serves the 11 type of food, how expensive the restaurant is, the location of the restaurant, etc. These are goals to 12 information or knowledge, what we are calling learning goals. These goals can be held by computers too; a computer might "want" to find out the 13 of a restaurant, and read a guide in order to do so in 14 way as a person might. While such a goal would not arise out of hunger in the 15 of the computer, it might well arise out of the "goal" to learn more about restaurants.
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单选题Which of the following statements best expresses the main idea of the text?
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单选题The latest car model embodies the new research development.
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单选题Last year, the crime rate in Chicago has sharply {{U}}dropped{{/U}}. A. declined B. lessened C. descended D. slipped
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单选题How a Terrible Battle helped to Change Europe Ninety years ago on a sunny morning in Northern France, something happened that changed Britain and Europe forever. At half past seven on the morning of July 1, 1916, whistles blew and thousands of British soldiers 1 their positions to attack their German enemies. 2 the end of the day, 20, 000 of them were dead, and another 30,000 wounded or missing. The Battle of the Somme, 3 it is called, lasted for six months. When it ended, 125,000 British soldiers were dead. They had gained five kilometers of ground. This was one of a series of great battles during the WWⅠ. The 4 on the Somme was staged to relieve pressure on the French, who were 5 in a great battle of their own at a place called Verdun. By the time the battle ended, over a million French and German troops had been killed. About 17 million people were killed in WWⅠ. There have been wars with greater numbers of dead. But there has never been one 6 most of the dead were concentrated in such a small area. On the Somme battlefield, two men died for every meter of space. Local farmers working in the land still 7 the bodies of those who died in that battle. The dead of all nations were buried in a series of giant graveyards 8 the line of the border between France and Belgium. Relatives and descendants (后代) of those who died still 9 these graveyards today. It took a second great conflict before Europe was to 10 against war itself. Twenty-eight years after the Somme battle, a liberating army of British. American and Canadian troops took 11 France from another German invasion. More than 500,000 people were killed. New graveyards were built. Two great conflicts across two generations helped to change the European 12 about war. Germany, once the most warlike country in Europe, is now probably more in favor of peace than any other. One major 13 of war in Europe was rivalry (竞争) between France and Germany. The European Union was specifically formed to 14 that rivalry. The last British veteran (老兵) of the Somme battle died in 2005, aged 108. And the WWⅠ is passing out of 15 and into history. But for anyone who wants to understand how Europeans think, it is still important to know a little about the terrible events of July 1, 1916.
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单选题In Britain and many other countries {{U}}appraisal{{/U}} is now a tool of management-
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单选题When I told the manager I didn't have the goods I had ordered delivered on time, he promised to {{U}}investigate{{/U}} my complaint.
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单选题America's emphasis on the importance of education for everyone has spurred scientific research.A. encouragedB. endangeredC. endorsedD. enlarged
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单选题Where Did All the Ships Go? The Bermuda Triangle is one (51) the greatest mysteries of the sea. In this triangular area between Florida, Puerto Rico and Bermuda in Atlantic, ships and airplanes (52) to disappear more often than in (53) parts of the ocean. And they do so (54) leaving any sign of all accident or any dead bodies. It is (55) that Christopher Columbus was the first person to record strange happenings in the area. His compass stopped working, a flame came down from the sky, and a wave 100 to 200 feet high carried his ship about a mile away. The most famous disappearance in the Bermuda Triangle was the US Naval Air Flight 19. (56) December 5,1945,five bomber planes carrying 14 men, (57) on a training mission from the Florida coast. Later that day, all communications with Flight 19 were lost. They just disappeared without a trace. The next morning,242 planes and 19 ships took part in the largest air-sea search in history. But they found nothing. Some people blame the disappearances (58) supernatural forces. It is suggested the (59) ships and planes were either transported to other times and places, kidnapped by aliens (60) attacked by sea creatures. There are (61) natural explanations ,though. The US Navy says that the Bermuda triangle is one of two places on earth (62) a magnetic compass points towards true north (63) magnetic north. (64) planes and ships can lose their way if they don't make adjustments. The area also has changing weather and is known (65) its high waves. Storms can turn up suddenly and destroy a plane or ship. Fast currents could then sweep away any trace of an accident.
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单选题Most Americans find the idea of arranged marriages difficult to understand or accept. They believe that two people should marry for love, after a period of dating or courtship. From their point of view, marriage is the result of mutual attraction and affection rather than practical consideration. In the United States, parents do not arrange marriages for their children. The couple meet independently, either through their academic experience or social contact, without the assistance of a go - between or a matchmaker. How do couples meet in the United States?A. With the assistance of a matchmaker.B. Through academic experience or social contact.C. With the help of their parents.D. Through the arrangement of the families.
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单选题Want to Be 100? Listen to These 5 Centenarians(百岁老人) Five neighbors at a central Missouri retirement community who are all centenarians get asked all the time: "How did you live to be 100?" If you want to live to 100 or more, this rare group of five golden girls says the key to longevity (长寿) is working hard at a job you love and taking care of your body while you"re at it. Even though an estimated 70,000 people in the country are currently at the century mark or beyond in age, it is unusual to find five 100-year-olds living in one place. The average life-span(寿命) of Americans is about two or three years short of an 80th birthday party. And most people don"t want to cut out coffee, soda, alcohol, cigarettes, and eat healthy food. "People tell me all the time, "I don"t want to live to be 100,"" said Mildred Leaver, who turned 100 in June. "I think that"s just sad. Aging is attitude and I don"t feel old," said Leaver, a former educator who still drives her Buick around town. It doesn"t take long to see that Leaver and her neighbors Mildred Harris, Grace Wolfson, Gladys Stuart and Viola Semas, have a lot more in common than their longevity and lifelong healthy habits. All are 100 except Stuart, who is 101. Even though their sight and hearing aren"t what they used to be, they"ve all avoided illnesses that many elderly people are stricken with. It"s been 50 years since Leaver beat cancer for the first and only time. The common thread that connects these women is the decades of service to jobs each loved as a farmer, designer, school principal, bookkeeper and secretary. In the early years of their lives, gainfully employed women like them were just as rare as 100-year-old are today.
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单选题Democracy {{U}}initially{{/U}} developed in Athens.
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