职称英语考试补全对话.docx

1、职称英语考试 补全对话第一篇Mobile PhonesMobile phones should carry a label if they proved1 to be a dangerous source of radiation, according to Robert Bell, a scientist. And no more mobile phone transmitter towers should be built until the long-term health effects of the electromagnetic radiation they emit are sc

2、ientifically evaluated, he said. “Nobodys going to drop dead overnight2 but we should be asking for more scientific information，” Robert Bell said at a conference on the health effects of low-level radiation. 1 C“If mobile phones are found to be dangerous, they should carry a warning label until pro

3、per shields can be devised,” he said._A report widely circulated among the public says that up to now scientists do not really know enough to guarantee there are no ill-effects on humans from electromagnetic radiation. According to Robert Bell, there are 3. 3 million mobile phones in Australia alone

4、 and they are increasing by 2,000 a day3. _2BBy the year 20004 it is estimated that Australia will have 8 million mobile phones ：nearly one for every two people._As well, there are 2,000 transmitter towers around Australia, many in high density residential areas5. _3EFor example, Telstra, Optus and

5、Vodaphone build their towers where it is geographically suitable to them and disregard the need of the community._The electromagnetic radiation emitted from these towers may have already produced some harmful effects on the health of the residents nearby.Robert Bell suggests that until more research

6、 is completed the Government should ban construction of phone towers from within a 500 metre radius of school grounds, child care centres, hospitals, sports playing fields and residential areas with a high percentage of children. _4 AHe says there is emerging evidence that children absorb low-level

7、radiation at a rate more than three times that of adults6._ He adds that there is also evidence that if cancer sufferers are subjected to electromagnetic waves the growth rate of the disease accelerates._5 DThen who finances the research?_ According to Robert Bell, it is reasonable for the major tel

8、ephone companies to fund it. Besides, he also urges the Government to set up a wide-ranging inquiry into possible health effects.第二篇The Worlds Longest BridgeRumor has it that1 a legendary six-headed monster lurks in the deep waters of the TyrrhenianSea between Italy and the island of Sicily.(1) C If

9、 true, one day you might spy the beast while zipping (呼晡而过)across the Messina Strait Bridge. When completed in 2010, theworlds longest bridge will weigh nearly 300,000 tons 一 equivalent to the iceberg that sank the Titanic and stretch 5 kilometers long. “ Thats nearly 50 percent longer than any othe

10、r bridge ever built. ，says structural engineer Shane Rixon.(2 B What do the worlds longest bridges have in common?) Theyre suspension bridges, massive structures built to span vast water channels or gorges. A suspension bridge needs just two towers to shoulder the structures mammoth weight, thanks t

11、o hefty supporting cables slung between the towers and anchored firmly in deep pools of cement at each end of the bridge. The Messina Strait Bridge will have two 54，100-ton towers, which will support most of the bridges load. The beefy cables of the bridge, each 1. 2 meter in diameter, will hold up

12、the longest and widest bridge deck ever built.When construction begins on the Messina Strait Bridge in 2005, the first job will be to erect two 370 meter-tall steel towers. (3 ) E The second job will be to pull two sets of steel cables across the strait, each set being a bundle of 44,352 individual

13、steel wires. Getting these cables up will be something2. Its not just their length totally 5. 3 kilometers but their weight. (4) F They will tip up the scales at 166,500 tons more than half the bridges total mass.After lowering vertical “suspender，cables from the main cables, builders will erect a 6

14、0 meter-wide 54,630-ton steel roadway, or deck wide enough to accommodate 12 lanes of traffic. The decks weight will pull down on the cables with a force of 70,500 tons. In return, the cables yank up against their firmly rooted anchors with a force of 139，000 tons equivalent to the weight of about 1

15、00,000 cars. Those anchors are essential. (5) D Theyre what will keep the bridge from going anywhere.第三篇：Reinventing the Table An earth scientist has rejigged the periodic table1 to make chemistry simpler to teach to students._1 A. There have been many attempts to redesign the periodic table since D

16、mM Mendeleev2 drew it up in 1871._But Bruce Railsback from the University of Georgia says he is the first to create a table that breaks with tradition and shows the ions of each element rather than just the elements themselves.“I got tired of breaking my arms trying to explain the periodic table to

17、earth students,”he says, criss-crossing his hands in the air and pointing to different bits of a traditional table._2 B. Railsback has still ordered the elements according to the number of protons they have._But he has added contour lines to charge density, helping to explain which ions react with w

18、hich.Geohemists just want an intuitive sense of whats going on with the elements, says Albert Galy from the University of Cambridge4,_3 C. “I imagine this would be good for undergraduates.”_4 D. Railsback has listed some elements more than once._He explains that sulphur, for example , shows up in th

19、ree different spots one for sulphide, which is found in minerals, one for su1phite, and one for su1phate, which is found in sea sa1t, for instance.He has also inc1uded symbols to show which ions are nutrients，and which are common in soi1 or water._5 E. And the size of elements symbol reflects how mu

20、ch of it is found in the Earths crust._第四篇：The Bilingual BrainWhen Karl Kim immigrated to the United States from Korea s a teenager, he had a hard time learning English. Now he speaks it fluently, and he had a unique opportunity to see how our brains adapt to a second language. As a graduate student

21、, Kim worked in the lab of Joy Hirsch, a neuroscientist in New York. 1 F Their work led to an important discovery. They found evidence that children and adults dont use the same parts of the brain when they learn a second language.The researchers used an instrument called an MRI( magnetic resonance

22、imaging) scanner to study the brains of two groups of bilingual people. 2 B One group consisted of those who had learned a second language as children. . The other consisted of people who, like Kim, learned their second language later in life. People from both groups were placed inside the MRI scann

23、er. This allowed Kim and Hirsch to see which parts of the brain were getting more blood and were more active. They asked people from both groups to think about what they had done the day before, first in one language and then the other. They couldnt speak out loud because any movement would disrupt

24、the scanning.Kim and Hirsch looked specifically at two language centers in the brain - Brocas area , which is believed to control speech production, and Wernickes area, which is thought to process meaning. Kim and Hirsch found that both groups of people used the same part of Wernickes area no matter

25、 what language they were speaking. 3 A But their use of Brocas area was different.People who learned a second language as children used the same region in Brocas area for both their first and second languages. People who learned a second language later in life used a different part of Brocas area fo

26、r their second language. 4 C How does Hirsch explain this difference? Hirsch believes that when language is first being programmed in young children, their brains may mix the sounds and structures of all languages in the same area. Once that programming is complete, the processing of a new language

27、must be taken over by a different part of the brain.A second possibility is simply that we may acquire languages differently as children than we do as adults. Hirsch thinks that mothers teach a baby to speak by using different methods involving touch, sound, and sight. 5E And that is very different

28、from learning a language in a high school or college class.第五篇A Record-Breaking RoverNASAs Mars rover Opportunity has boldly gone where no rover has gone before-at least in terms of distance. _1 FSince arriving on the Red Planet in 2004, Opportunity has traveled 25.01 miles, more than any other whee

29、led vehicle has on another world._On July 27, after years of moving about on Martian ground, the golf-cart-sized Opportunity had driven more than 24 miles, beating the previous record holder-a Soviet rover sent to the moon in 1973.“This is so remarkable considering Opportunity was intended to drive

30、about 1 kilometer and was never designed for distance,” says John Callas, the Mars Exploration Rover Project Manager._2 BHe works at NASAs Jet Propulsion Laboratory in Pasadena, California._ “But what is really importantly is not how many miles the rover has racked up, but how much exploration and d

31、iscovery we have accomplished over that distance.”OPPORTUNITYThe solar-powered Opportunity and its twin rover, Spirit, landed on Mars 10 years ago on a mission expected to last 3 months. _3 EThe objective of the rovers was to help scientists learn more about the planet and to search for signs of lif

32、e，such as the possible presence of water. _Spirit stopped communicating with Earth in March 2010, a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.During its mission, Opportunity has captured, and sent back to Earth, some 187,000 panoramic and microscopic images of Mars with its cameras. _4 AIt has also provided scientists with data on the planets atmosphere, soil, rocks, and terrain. _MARATHON ROVERThe rover