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Marvin Burnham We are in an energy crisis and we will have to do something quickly. Fossil fuels are rapidly running out. The tragedy is that fossil fuels are far too valuable to waste on the production of electricity. Just think of all the things you can make from oil! If we don’t start thinking ways to face the problem, it will be too late.Catherine Woodstock Instead of burning fossil fuels we should be concentrating on more economic uses of electricity, because electricity can be produced from any source of energy. We can do research on solar energy, wind power, wave power, tidal power, hydroelectric schemes etc; otherwise, our fossil fuels will run out, and we’ll all freeze or starve to death. We really won’t survive unless we start working on cleaner, safer sources of energy.Michael Parkhurst In the past, we consumed too much energy. If we didn’t waste so much energy, our resources would last longer. You can save more energy by conservation than you can produce for the same money. Unless everyone realize the seriousness of energy crisis and stop wasting, our resources will not support us for long.Charles Wicks I don’t agree with some of the estimates of world energy reserves. More oil and gas is being discovered all the time. If we listened to the pessimists, none of us would sleep at night. In the short term, we can still rely on the fossil fuels—oil, coal and gas. Researches are going on and new sources of energy will be found in the future. So there is nothing to worry about.Jennifer Hughes Some people think nuclear power is away to solve the problem, but think of the potential danger of it. There is no perfect machine. I mean, why do aeroplanes crash Machines fail. People make mistakes. What would happen if there were a serious nuclear accident And an accident must be inevitable—sooner or later. Huge areas would be evacuated, and they could remain contaminated with radioactivity for years. If it happened in your area, you wouldn’t get a penny in compensation. No insurance company covers nuclear risks. Radioactivity causes cancer and may affect future generations, too. Now match each of the schools to the appropriate statement. Note: there are two extra statements.[A] We should take steps to solve the problem.[B] Saving the present resources is the most important thing.[C] Nuclear power is an ideal alternative.[D] We should develop alternative sources of power.[E] I’m optimistic about the future of energy.[F] Nuclear power is not secure.[G] Energy crisis is inevitable. ( ) Marvin Burnham
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简答题 简述资本主义工商业社会主义改造的成功经验。
Text Liwan is the name of Guangzhou’s southwest district, bordered by Renmin Lu to the south and west. Not so long ago, in the (26) 1900s, this area of the city was renowned (27) its Cantonese restaurants, gardens, teahouses and boat rides on (28) many waterways. This was at a time (29) the Liwan area was (30) into a new town in much the same way (31) the Tianhe area is now becoming the place to be in Guangzhou. Today, though, the Liwan district (32) rapid development (33) new high-rise apartment buildings are mushrooming everywhere. Most of the rivers that crossed the area (34) now disappeared, and (35) we can get to a boat ride is hiring a pedal boat on Liwan Lake. Fortunately, some attempt is (36) to preserve the area’s architectural and cultural heritage, particularly on the streets around Liwan Lake Park. On Longjin Xi Lu, for instance, you can still see some of the Xiguan houses and (37) unique wooden doors. These large three or four-story grey-brick houses were built (38) a Western style, and the interiors were decorated with the best of local crafts, (39) stained glass windows and (40) wooden furniture. They were the (41) of the neighborhood at the turn of the last century. As well as these Xiguan houses, the area (42) has some large European-style stone buildings. The Liwan Museum is (43) in one of these colonial buildings. It was built in 1912 for the local branch manager of a Hong Kong bank. The museum is stocked (44) with memorabilia (大事记) from Liwan’s colorful past—old photographs, maps, Cantonese opera costumes and (45) scrolls (名册). To find the museum, walk south along Longjin Xi Lu from the Liwan Lake Park’s entrance till the crossroads, then turn right.
论述题 毛泽东是如何论述社会主义社会两类不同性质的矛盾的？
CT Scans and Lung Cancer Small or slow-growing nodules (小结节) discovered on a lung scan are unlikely to develop into tumors over the next two years, researchers reported on Wednesday. The findings reported in the New England Journal of Medicine, could help doctors decide when to do more aggressive testing for lung cancer. They could also help patients avoid unnecessarily aggressive and potentially harmful testing when lesions (损伤) found. Lung cancer, the biggest cancer killer in the United States and globally, is often not diagnosed until it has spread. It kills 159,000 people a year in the United States alone. The work is part of a larger effort to develop guidelines to help doctors decide what to do when such growths, often discovered by accident, appear in a scan. High-tech X-rays called CT scans can detect tumors-but they see all sorts of other blobs (模糊的一团) that are not tumors, and often the only way to tell the difference is to take a biopsy (活检), a dangerous procedure. At the moment, routine lung cancer screening is considered impractical because of its high cost and because too many healthy people are called back for further testing. Good guideline could help make lung cancer screening practical, Dr. Rob van Kiaveren of the Erasmus Medical Center in Rotterdam, the Netherlands, who led the new study, said in a telephone interview. The team looked at 7, 557 people at high risk for lung cancer because they were current and former smokers. All received multidetector (多层螺旋) CT scans that measured the size of any suspicious-looking modules. Volunteers who had nodules over 9.7 mm in width, or had growth of 4.6 mm that grew fast enough to more than double in volume every 400 days, were sent for further testing. Of the 196 people who fell into that category, 70 were found to have lung cancer, 10 additional cases were found years later. But of the 7, 361 who tested negative during screening only 20 lung cancer cases later developed. In a second round of screening done one year after the first, 1.8 percent were sent to the doctor because they had a nodule that was large or fast-growing. More than half turned out to have lung cancer. The result means that if the screening test says you don’t have lung cancer, you probably don’t, the researcher said. "The chances of finding lung cancer one and two years after a negative first-round test were 1 in 1,000 and 3 in 1,000 respectively, "they concluded. According to the passage, good guidelines for lung cancer screening______.
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