2015职称英语(理工类)A级5篇完形填空 答案整理

第一篇Captain Cook Arrow Legend 库克船长弓箭的传说It was a great legend while it lasted，but DNA testing has (1) finally ended a two-century-old story of the Hawaiian arrow carved from the bone of British explorer Captain James Cook(2) who died in the Sandwich Islands’in 1779.“There is (3) no Cook in the Australian Museum，’’museum collection manager Jude Philip said not long ago in announcing the DNA evidence that the arrow was not made of Cook’S bone.But that will not stop the museum from continuing to display the arrow in its(4) exhibition，“Uncovered：Treasures of the Australian Museum,” which(5) does include a feather cape presented to Cook by Hawaiian King Kalani’opu’u in 1778.Cook was one of Britain’s great explorers and is credited with(6) discovering the“Great South Land，"(7) now Australia, in 1 770.He was clubbed to death in the Sandwich Islands，now Hawaii。

The 1egend of Cook’s arrow began in 1824 (8) when Hawaiian King Kamehameha on his deathbed gave the arrow to William Adams，a London surgeon and relative of Cook’s wife，saying it was made of Cook’s bone after the fatal(9) fight with islanders.In the 1890s the arrow was given to the Australian Museum and the legend continued (10) until it came face=to-face with science.DNA testing by laboratories in Australia and New Zealand revealed the arrow was not made of Cook’s bone but was more (11) likely made of animal bone。

said Philp.However, Cook’s fans (12) refuse to give up hope that one Cook legend will prove true and that part of his remains will still be uncovered.as they say there is evidence not a11 of Cook’s body was (13) buried at sea in 1 779.“On this occasion technology has won"，”said Cliff Thornton，president of the Captain Cook Society, in a (14) statement from Britain.“But I am (15) sure that one of these day s…one of the Cook legends will prove to be true and it will happen one day.’’第二篇Avalanche and Its Safety雪崩和安全问题An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are (1) among the biggest dangers in the mountains for both life and property.All avalanches are caused by an over-burden of material, typically snowpack, that is too massive and unstable for the slope (2) that supports it. Determining the critical load, the amount of over-burden which is (3)likely to cause an avalanche, (4) is a complex task involving the evaluation of a number of factors.Terrain slopes flatter than 25 degrees or steeper than 60 degrees typically have a low (5)risk of avalanche. Snow does not (6)gather significantly on steep slopes; also, snow does not (7)flow easily on flat slopes. Human-triggered avalanches have the greatest incidence when the snow's angle of rest is (8)between 35 and 45 degrees; the critical angle, the angle at which the human incidence of avalanches is greatest, is 38 degrees. The rule of thumb is: A slope that is (9)flat enough to hold snow but steep enough to ski has the potential to generate an avalanche, regardless of theangle. Additionally, avalanche risk increases with (10)use ; that is, the more a slope is disturbed by skiers, the more likely it is that an avalanche will occur.Due to the complexity of the subject, winter travelling in the backcountry is never 100% safe. Good avalanche safety is a continuous (11)process , including route selection and examination of the snowpack, weather (12)conditions, and human factors. Several well-known good habits can also(13) reduce the risk. If local authorities issue avalanche risk reports, they should be considered and all warnings should be paid (14)attention to. Never follow in the tracks of others without your own evaluations; snow conditions are almost certain to have changed since they were made. Observe the terrain and note obvious avalanche paths where plants are （15）missing or damaged. Avoid traveling below others who might trigger an avalanche.第三篇Giant Structures巨型建筑It is an impossible task to select the most amazing wonders of the modern world since every year more (1)wonderful constructions appear. Here are three giant structures which are worthy of our (2) admiration although they may have been surpassed by some more recent wonders.The Petronas Twin Towers1The Petronas Towers were the tallest buildings in the world when they were completed in 1999. With a (3) height of 452 metres, the tall twin towers, like two thin pencils, dominate the city of Kuala Lumpur2. At the 41st floor, the towers are linked by a bridge, symbolizing a gateway to the city. The American (4) architect Cesar Pelli designed the skyscrapers.Constructed of high-strength concrete, the building provides around l, 800 square metres of office space (5) on every floor. And it has a shopping centre and a concert hall at the base. Other (6) features of this impressive building include double-decker lifts, and glass and steel sunshades.The Millau Bridge3The Millau Bridge was opened in 2004 in the Tarn Valley, in southern France.(7) At the time it was built, it was the world's highest bridge, (8) reaching over 340m at the highest point. The bridge is described as one of the most amazingly beautiful bridges in the world. It was built to (9) relieve Millau's congestion problems. The congestion was then caused by traffic passing from Paris to Barcelona in Spain. The bridge was built to withstand the (10) most extreme seismic and climatic conditions. Besides, it is guaranteed for 120 years!The Itaipu Dam4The Itaipu hydroelectric power plant is one of the largest constructions of its kind in the world. It consists of a series of dams across the River Parana5, (11) which forms a natural border betweenBrazil6 and Paraguay. Started in 1975 andtaking 16 years to complete, the construction was carried out as a joint project between the two (12) countries . The dam is well-known for both its electricity output and its size. In 1995 it produced 78% 0f Paraguay's and 25% 0f Brazil's (13) energy needs. In its construction, the (14) amount of iron and steel used was equivalent to over 300 Eiffel Towers8. It is a (15) truly amazing wonder of engineering.第五篇Singing Alarms Could Save the Blind警报器救盲人If you cannot see, you may not be able to find your way out of a burning building ---- and that could be fatal. A company in Leeds could change all that （1）with directional sound alarms capable if guiding you to the exit.Sound Alert, a company （2）run by the University of Leeds, is installing the alarms in a residential home for （3）blind people in Sommerset and a resource centre for the blind in Cumbria.（4）The alarms produce a wide range of frequencies that enable the brain to determine where the （5）sound is coming from.Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be （6）heard by humans. “It’s a burst of white noise （7）that people say sounds like static on the radio,”she says. “Its life-saving potential is great.”She conducted an experiment in which people were filmed by thermal—imaging cameras trying to find their way out of a large （8）smoke-filled room. It （9）took them nearly four minutes to find the door （10）without a sound alarm, but only 15 seconds with one.Withington studies how the brain （11）processes sounds at the university. She says that the （12）source of a wide band of frequencies can be pinpointed more easily than the source of a narrow band. Alarms （13）based on the same concept have already been installed on emergency vehicles.The alarms will also include rising or falling frequencies to indicate whether people should go up （14）or down stairs. They were （15）developed with the aid of a large grant from British Nuclear Fuels.。