单选题{{B}}Directions:{{/B}} There are 5 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C, and D. You should decide on the best choice and mark your answer on the ANSWER SHEET by blackening the corresponding letter in the brackets. Although vocal cords are lacking in cetaceans, phonation is undoubtedly centered in the larynx. The toothed whales or odontocetes (sperm whales and porpoises) are much more vociferous than the whalebone whales, or mysticetes. In this country observers have recorded only occasional sounds from two species of mysticetes (the humpback and right whale). A Russian cetologist reports hearing sounds from at least five species of whalebone whales but gives no details of the circumstances or descriptions of the sounds themselves. Although comparison of the sound-producing apparatus in the two whale groups cannot yet be made, it is interesting to note that the auditory centers of the brain are much more highly developed in the odontocetes than in the mysticetes, in fact, to a degree unsurpassed by any other mammalian group.

单选题"Refrigerator production in China jumped from 1.4 million units in 1985 to 10.6 million in 1998," according to David Fridley, a researcher in the Department of Energy's Lawrence Berkeley National Laboratory, USA. The Global Environmental Facility, through the United :Nations Development Program, has decided to fund ＄ 9.3 million of the ＄40 million program to help the government of China transform its market for refrigerators. The refrigerator project began in 1989 when the EPA signed an agreement with the government of China to assist in the elimination of CFCs from refrigerators. Berkeley Lab has been involved in the project since 1995 through the U.S. Environmental Protection Agency, developing the market transformation program based on the success of the first phase of the project, which involved designing and testing CFC (chlorofluorocabon) free, energy-efficient refrigerators. Fridley says that beyond his technical supervisory role, the Laboratory will be involved in training and working with the State Bureau of Technical Supervision as the new efficiency standards are developed. "Market transformation," Fridley explains, "is the process of shifting consumer demand for a product, in this case to a more energy-efficient, environmentally favorable product through voluntary, market based means such as technical assistance and training for manufacturers, consumer education, and financial incentives to manufacture and sell the more efficient products." "Collectively, we developed a technical training program for Chinese refrigerator manufacturers interested in developing CFC free, efficient refrigerators; a financial incentive program to motivate manufacturers to build the most efficient refrigerator possible; and a mass purchasing program for Chinese government agencies that acquire refrigerators in bulk," Fridley says. In 1998, the refrigerator project was awarded an International Climate Protection Award by the EPA. "It is not widely known in the United States, but China has had an energy efficiency policy in place since the early 1980s, says Mark Levine, Environmental Energy Technologies Division director and an advisor to the Chinese government on energy efficiency." The government of China is committed to using energy more efficiently, and this has allowed the economy to grow at nearly twice the rate of energy consumption. "The Energy-Efficient Refrigerator Project will have a significant, direct effect on reducing greenhouse gas and pollutant emissions. We Berkeley Lab are grateful to have the chance to work with the people and government of China on this project, as well as on our other refrigerator production projects in energy data analysis, appliance efficiency standards, and technical advice on cogeneration plants ," adds Levine.

单选题My little brother practices the speech repeatedly until his Udelivery /Uand timing were perfect.

单选题If you ______ your influence, they may change their decision. A. compel B. exert C. expose D. vary

单选题 Priscilla Ouchida's "energy-efficient" house turned out to be a horrible dream. When she and her engineer husband married a few years ago, they built a $ 100, 000, three-bedroom home in California Tightly sealed to prevent air leaks, the house was equipped with small double-paned(双层玻璃的) windows and several other energy-saving features. Problems began as soon as the couple moved in, however. Priscilla's eyes burned. Her throat was constantly dry. She suffered from headaches and could hardly sleep. It was as though she had suddenly developed a strange illness. Experts finally traced the cause of her illness. The level of formaldehyde(甲醛) gas in her kitchen was twice the maximum allowed by federal standards for chemical workers. The source of the gas? Her new kitchen cabinets and wail-to-wall carpeting. The Ouchidas are victims of indoor air pollution, which is not given sufficient attention partly because of the nation's drive to save energy. The problem itself isn't new. "The indoor environment was dirty long before energy conservation came along," says Moschandreas, a pollution scientist at Geomet Technologies in Maryland. "Energy conservation has tended to accentuate the situation in some cases." The problem appears to be more troublesome in newly constructed homes rather than old ones. Back in the days when energy was cheap, home builders didn't worry much about unsealed cracks. Because of such leaks, the air in an average home was replaced by fresh outdoor air about once an hour. As a result, the pollutants generated in most households seldom built up to dangerous levels.

单选题Who is the speaker?

单选题City officials am considering building a path to give the public ______ to the site.

单选题Is it proper for the government to ______ public opinion through self-serving, one-sided journalism? A. touch B. hunt C. sway D. proceed

单选题According to a growing number of experts, it is already technically_____to construct a pioneering space colony, powered by solar energy.

单选题What is it that the author wants to ______ to his readers through the story?

单选题I come into ______with all kinds of people in my work.

单选题Sally Kemmerer has, so far, escaped Northern California's rolling blackouts. But up on the roof for her Oakland home, workers are tapping into, perhaps, the most reliable power source, the sun. It could mean no more worries about blackouts or power rates. Sally Kemmerer, homeowner says, "I hope that we'll be able to zero out, you know, our electric bill. I mean that's definitely our goal." Turning the sun's rays into electricity is, of course, nothing new. But California's power crisis has cast a new light on the technology. Gary Gerber, a solar power contractor, says, "I might have been getting, say three phone calls a week a couple of months age. I'm getting six a day now, it's completely crazy." Alternative energy is even more attractive, thanks to a state rebate program. So far this month, California's energy commission has received 200 project applications. That is more than the number of applications all last year. Putting in a solar roof is still a relatively expensive proposition. This project cost around 45000 dollars. Even taking into account the state subsidy of 12000 dollars, that leaves a net cost to the homeowner of around 33000 dollars. Sally says, "We were happy to find out that, eventually, the system should pay for itself, you know 20-years, maybe." Aaron Wellendorf has had a p-v (or photovoltaic generator) for more than a year. Like most solar systems, his is not off the grid completely the utility still kicks in at night, or when there's no sun. But when there is bright light, things change. Wellendorf says, "I'm turning my meter backward with extra power that I'm generating." Backward? That's right! Wellendorf's meter tracks how much power goes back into the utility grid. Last year all the paid for electricity was a service charge. That charge was around five dollars a month. In fact, even after powering his super-efficient household appliances and his converted electric truck, Wellendorf generated a net surplus of more than 2000-kilowatt hours. Unfortunately, state law doesn't require the utility to pay him for that. Wellendorf says, "I don't get it in money, I just get the satisfaction of helping out the power grid." And, he gets the satisfaction of being energy self-sufficient.

单选题Small animals are said to live faster than big ones because they ______.

单选题The jet quickly ______ into the sky and soon went out of our view. A. ascended B. launched C. assessed D. descended

单选题My work with leaders from all walks of life has ______ me that they were not born leaders—they are made. A. advocated B. implied C. convinced D. illustrated

单选题After lunch I felt ______ enough to ask my boss for a rise in my weekly wages.