单选题To absorb a younger work force, many companies offered retirement plans as incentives for older workers to retire and make way for the younger ones who earned lower salaries.

单选题She gave up her job and started writing poetry.

单选题A deadly disease has affected these animals.

单选题"There is no other choice," she said in a harsh voice.

单选题The father was unwilling to give his son the keys to his car.

单选题What has Althouse Bus Transportation been mainly aiming at?

单选题The chemist analyzed that there was no trace of poison in the coffee.

单选题I am really thankful to you for all you have done for me.A. helpfulB. usefulC. pitifulD. grateful

单选题One Good Reason to Let Smallpox Live It's now a fair bet that we will never see the total extinction of the smallpox virus. The idea was to cap the glorious achievement of 1980, when smallpox was eradicated in the wild, by destroying the killer virus in the last two labs that are supposed to have it—one in the US and one in Russia. If smallpox had truly gone from the planet, what point was there in keeping these reserves? (51) reality, of course, it was naive to (52) that everyone would let (53) of such a potent potential weapon. Undoubtedly several nations still have (54) vials. (55) the last "official" stocks of live virus bred mistrust of the US and Russia, (56) no obvious gain. Now American researchers have (57) an animal model of the human disease, opening the (58) for tests on new treatments and vaccines. So once again there's a good reason to (59) the virus—just in (60) the disease puts in a reappearance. How do we (61) with the mistrust of the US and Russia? (62) . Keep the virus (63) international auspices in a well-guarded UN laboratory that's open to all countries. The US will object, of course, just as it rejects a multilateral approach to just about everything. But it doesn't (64) the idea is wrong. If the virus (65) useful, then let's make it the servant of all humanity—not just a part of it.

单选题Jack is a {{U}}diligent{{/U}} worker. A. ambitious B. lazy C. hardworking D. clever

单选题It seemed （incredible） that he had been there a week already.

单选题She is Uslender/U, with delicate wrists and ankles.

单选题In a bullfight, it is the movement, not the color, of objects that arouses the bull.A. confusesB. excitesC. scaresD. satisfies

单选题He ceaselessly interrupted me by asking many irrelevant questions.

单选题What can be inferred from the passage about the route to long life?

单选题The Soviet Union was a capitalist country.

单选题This kind of animals is on the verge of dying out.A. drying upB. extinctionC. dying offD. distinction

单选题The Klondike was the scene of one of the biggest gold rushes the world has ever known.A. locationB. viewC. eventD. landscape

单选题Sports Star Yao Ming If Yao Ming is not the biggest sports star in the world, he is almost certainly the tallest. At 2.26m, he is the tallest player in the National Basketball Association (NBA) and holds the record as the most towering Olympian ever to compete in the Games. But what really stands out about the giant center is his celebrity (名气). Few, if any, Chinese athletes are as well-known as Yao around the world. People across the globe are fascinated with Yao, not only for his basketball prowess (杰出的才能) but also for being a symbol of international commerce. When Yao joined the Houston Rockets as the No. 1 pick in the 2002 NBA draft (选拔), he was the first international player ever to be selected first. His assets on the court are clear enough—no NBA player of his size has ever possessed his mobility, so he is a handful (难对付的人) for opponents on either end of the court. But what makes Yao invaluable to the Rockets organization is his role as a global citizen and as a bridge to millions of potential basketball fans in China. When it was announced in February that Yao would miss the rest of the NBA season and possibly the Olympics with a stress fracture (骨折) in his left foot, a collective shudder (震动) spread across China. After considerable debate and discussion, Yao opted to get his foot surgically treated in an operation that placed several tiny screws across the bone, to offer his overburdened foot more support. The surgery was a success, and though the estimated four-month recovery period will leave him little time to prepare with Team China, Yao has vowed to be ready for the Beijing Olympics. Yao wrapped up a 10-day trip to China, where he underwent a series of traditional Chinese medicine (TCM) treatments, hoping to accelerate his recovery process. Western experts are generally skeptical of TCM"s benefits, although new research from the University of Rochester suggests that a certain compound derived from shellfish may indeed stimulate bone repair. "There is no reason to dismiss TCM," Yao told a press conference in Beijing. "It"s been used in our country for thousands of years. I don"t think that it"s short on science."

单选题Weather Map A weather map is an important tool for geographers. A succession of three or four maps presents a continuous picture of weather changes. Weather forecasts are able to determine the speed of air masses and fronts; to determine whether an individual Pressure area is deepening or becoming shallow and whether a front is increasing or decreasing in intensity. They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is moving. Thus, a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time. All students of geography should be able to interpret a weather map accurately. Weather maps contain an enormous amount of information about weather conditions existing at the time of observation over a large geographical area. They reveal in a few minutes what otherwise would take hours to describe. The United States Weather Bureau issues information about approaching storms, floods, frosts, droughts, and all climatic conditions in general. Twice a month it issues a 30-day "outlook" which is a rough guide to weather conditions likely to occur over broad areas of the United States. These 30-day outlooks are based upon an analysis of the upper air levels which often set the stage for the development of air masses, fronts, and storms. Considerable effort is being exerted today to achieve more accurate weather predictions. With the use of electronic instruments and earth satellites, enormous gains have taken place recently in identifying and tracking storms over regions which have but few meteorological stations. Extensive experiments are also in progress for weather modification studies. But the limitations of weather modification have prevented meteorological results except in the seeding of super-cooled, upslope mountainous winds which have produced additional orographical precipitation on the windward side of mountain ranges. Nevertheless, they have provided a clearer understanding of the fundamentals of weather elements.