单选题With three young children to take care of, Cathy is kept on the run every minute of the day. A. walking B. at full speed C. busy D. on foot

单选题All the students in this university are Urequested/U to comply with the regulations.

单选题AIDS is causing great public concern because the ______ fatal disease hits primarily young people.(2002年中国人民大学考博试题)

单选题This is the seventh year _______ that they've won the cup.

单选题With the purchasing power of many middle-class households ______ behind the cost of living, there was an urgent demand for credit. A. leaving B. levering C. lacking D. lagging

单选题Is it more truly democratic to hold a ______, rather than let the government alone decide an important issue. A. reincarnation B. referendum C. refinery D. regression

单选题He complied with the requirement that all graduate students in education ______ a thesis.

单选题The lecturer______his explanation with some tape recordings.

单选题For more than 40 years, Earth has been sending out distress signals. At first they were subtle, like the thin shells of bald-eagle eggs that cracked because they were laced (使混合) with DDT. Then the signs were unmistakable, like the covering of smoke over the Amazon rain forest, where farmers and ranchers (牧场主人) set fire to clear land. Finally, as the new millennium drew near, it was obvious that Earth's pain had become humanity's pain. The collapse of the North Atlantic cod (鳕鱼) fishery put 30,000 Canadians out of work and ruined the economies of 700 communities. In 1998, deforestation worsened China's floods, which killed 3,600 people and left 14 million homeless. Population pressures and overcrowding raised the toll from 1999's rains in Latin America, which killed more than 30,000 people and created armies of environmental refugees. And how have we responded to four decades of ever louder distress signals? We've staged a procession, of Earth Days, formed Green parties, passed environmental laws, forged a few international treaties and organized global gabfests (杂谈会) like the 1992 Earth Summit in Rio de Janeiro. All the while, the decline of earth's ecosystems has continued unabated. What will it take for us to get serious about saving our environment? When will environmentalism more from being a philosophy promoted by a passionate minority to a way of life that governs mainstream behavior and policy? How can we understand that Earth is one big natural system and that torching tropical rain forests and destroying coral reefs (珊瑚礁) will eventually threaten the well-being of towns and cities everywhere? One crucial step is a true accounting of the state of the planet, a thorough assessment of the health of all Earth's major ecosystems, from oceans to forests. Only a comprehensive global survey can show how damage to one system is affecting other systems and can determine whether Earth as a whole is losing its ability to nurture the full diversity of life and the economies of nations.

单选题In ancient times, some catastrophic extinction of species occurred______.(2004年武汉大学考博试题)

单选题How do aristocratic societies' perception of spiritual powers influence whether they are "favor able to poetry" or not?

单选题American football and baseball are becoming known to the British public through televised______from the United States. A. transfer B. deliveries C. transportation D. transmissions

单选题The accident ______ him of his sight and the use of his legs. A. excluded B. disabled C. deprived D. gripped

单选题He was so ______ at tying fisherman's flies that he was asked to demonstrate his technique at sports fairs and exhibitions.

单选题A Since it is necessary for about nine-tenths of the volume of sea water to evaporate for rock salt to be formed, it is believed that the thick rock rock-salt beds that are found B were deposited C in D what are used to be partly enclosed seas.

单选题He tried but failed in his attempt to avoid being Uprosecuted/U by practicing bribery.

单选题 Experts urge a reforesting of cleared areas, promotion of reduced-impact logging, and ______ agriculture, to maintain the rain forest.