单选题Although the study of genetics is an entirely new field, it______mankind for many years.

单选题What is an Advance Directive?

单选题______if I had arrived yesterday without letting you know beforehand?

单选题The accommodation was at a comfortable hotel, the meeting facilities ______.

单选题Speaker A: I'm not at all satisfied with the service.Speaker B:______A. Nobody has complained like that before.B. I sincerely apologize for that.C. I wonder why you are satisfied with it.D. It' s not our fault as there are too many customers.

单选题Some people viewed the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remains______ . A．to be shown B．to have shown C．to have been shown D．being shown

单选题If we don't stop flirting with those deathly nuclear weapons, the whole globe will be ______. A. empowered B. punished C. polluted D. annihilated

单选题Video games have become increasingly realistic, especially those involving armed combat. America's armed forces have even used video games (1) recruitment and (2) tools. But the desire to play games is not the (3) why the United States Air Force recently (4) a procurement request for 2,200 Sony PlayStation 3 (PS3) video-game consoles. It intends to link them (5) to build a supercomputer that will (6) Linux, a free, open-source operating system. It will be used for research, including the development of high-definition imaging systems for radar, and will cost around one-tenth as much as a conventional supercomputer. The air force has already built a smaller computer (7) a cluster of 336 PS3s. This is merely the latest example of a(n) (8) trend. There is a long tradition of technology developed for military use filtering (9) to consumer markets: satellite-navigation systems (10) to guide missiles can also help hikers find their way, and head-up displays have (11) from jet fighters to family cars. But technology is increasingly moving in the other (12) , too, as consumer products are (13) for military use. Traditionally the military has preferred to develop and control its own technology, not just for tactical advantage but also to (14) that equipment was tough and (15) enough for those whose lives would depend on it. That began to change after the cold war as defence budgets became (16) and the development of (17) industrial and consumer products accelerated. As some of these technologies have become commoditized products which are (18) to everyone—friend and foe alike—there seems less (19) not to buy them and use the savings for more critical equipment that needs to be built-to-order. And consumer products can often be tweaked to make them more rugged or (20) when necessary.

单选题In the opinion of the writer, why do women still earn less money than men?

单选题The scientific community was ______ when a living specimen of the coelacanth, long thought to be ______ was discovered by deep-sea fisherman. A. perplexed... common B. overjoyed... dangerous C. unconcerned... local D. astounded... extinct

单选题Papusek noticed in his studies that baby ______. A. would make learned responses when it saw the milk B. would carry out learned movements when it had enough to drink C. would continue the simple movements without being given milk D. would turn its head to right .or left when it had enough to drink

单选题The head of the navy heaped scorn on both the methods and motives of the conspirators.

单选题A: Here"s a gift for you, I bought it in India. B: ______

单选题______ is good at French. A．My either children B．Either of my children C．Either my children D．My either of children

单选题The moment someone broke into the factory, a burglar______rang in the police station.

单选题 Until recently, corporate ideology in the United States has held that bigger is better. This traditional view of the primacy of big, centralized companies is now being challenged as some of the giants of American business are being outperformed by a new generation of smaller, streamlined businesses. If it was the industrial revolution that spawned the era of massive industrialized companies, then perhaps it was the information revolution of the 1990s that spawned the era we're now in—the era of the small company. For most of the 20th century, big companies dominated an American business scene that seemed to thrive on its own grandness of scale. The expansion westward, the growth of the railroad and steel industries, an almost limitless supply of cheap raw materials, plus a population boom that provided an ever-increasing demand for new products(although not a cheap source of labor) all coincided to encourage the growth of large companies. But rapid developments in the marketplace have begun to change the accepted rules of business and have underscored the need for fast reaction times. Small companies, without huge overhead and inventory, can respond quickly to a technologically advanced age in which new products and technologies can become outmoded within a year of their being brought to market. Of course, successful emerging small companies face a potential dilemma in that their very success will tend to turn them into copies of the large corporate dinosaurs they are now supplanting. To avoid this trap, small companies may look to the example of several CEOs of large corporations who have broken down their sprawling organizations into small, semi-independent divisions capable of surviving in today's marketplace.

单选题The man was sentenced to 10 years in prison because he______a government official.