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According to the US government, wind farms off the Pacific coast could produce 900 gigawatts of electricity every year. Unfortunately, the water there is far too deep for even the tallest windmills (see picture) to touch bottom. An experiment under way off the coast of Norway, however, could help put them anywhere.
The project, called Hywind, is the world’s first large scale deepwater wind turbine (涡轮发电机).Although it uses a The project, called Hywind, is the world’s first large scale deepwater wind turbine (涡轮发电机).Although it uses a
The project, called Hywind, is the world’s first large scale deepwater wind turbine (涡轮发电机).Although it uses a
The project, called Hywind, is the world’s first large scale
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deepwater wind turbine (涡轮发电机).Although it uses a fairly standard 152ton, 2.3megawatt turbine, Hywind represents totally newtechnology. The turbine will be fixed 213 feet above the water on a floating spar (see picture),a technologyHywind’s
creator,
the
Norwegian
company
StatoilHydro, has developed recently. The steel spar, which is filled with stones and goes 328 feet below the sea surface, will be tied to the ocean floor by three cables(缆索);these will keep the spar stable and prevent the turbine from moving up and down in the waves. Hywind’s stability (稳定性) in the cold and rough sea would prove that even the deepest corners of the ocean are suitable for wind power. If all goes according to plan, the turbine will start producing electricity six miles off the coast of southwestern Norway as early as September.
To produce electricity on a large scale, a commercial wind farm will have to use bigger turbines than Hywind does, but it’s difficult enough to balance such a large turbine so high on a floating spar in the middle of the ocean. To make that turbine heavier, the whole spar’s centre of gravity must be moved
much closer to the ocean’s surface. To do that,the company plans to design a new kind of wind turbine, one whose gearbox
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(变速箱) sits at sea level rather than behind the blades (see picture).
Hywind is a test run, but the benefits for perfecting floating wind farm technology could be extremely large. Out at sea, the wind is often stronger and steadier than close to shore, where all existing offshore windmills are planted. Deep sea farms are invisible from land, which helps overcome the windmill as eyesore objection. If the technology catches on, it will open up vast areas of the planet’s surface to one of the best low carbon power sources available.
( )1.The Hywind project uses totally new technology to ensure the stability of ________.
A.the cables which tie the spar to the ocean floor B.the spar which is floating in deep sea water C.the blades driven by strong and steady sea wind D.the stones filled in the spar below the sea surface
( )2.To balance a bigger turbine high on a floating spar, a new type of turbine is to be designed with its gearbox sitting ________.
A.on the sea floor B.on the spar top C.at sea level D.behind the blades ( )3.Wide applications of deepwater wind power technology
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can ________.
A.solve the technical problems of deepwater windmills B.make financial profits by producing more turbines C.settle the arguments about environmental problems D.explore low carbon power resources availableat sea 答案:BCD (一)
One of Nigeria’s most famous singers has gone on hunger strike outside the gates of the National Television Authority in protest at what she says is its refusal to pay royalties on her songs.
Onyeka Onwenu’s protest has attracted widespread support from other Nigerian musicians, who often complain that they do not receive royalties(版税) when their songs are broadcast on television and radio.
The pop singer Onyeka Onwenu has been sitting outside the gates of the Nigerian Television Station for the past three days. She says that during that time she’s not eaten but that she has had some orange juice. Other musicians are taking turns to sit with her in a show of support. ‘Show me the money’
Ms Onwenu appears to be in a determined state of mind.“ I
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