摘要:73.Water can be used to produce (电).

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There are two methods by which hydrogen (氢) can be used to power cars. The first way is to use hydrogen to drive the engine, in much the same way as many cars use gas. The second method is to use the reaction of hydrogen with oxygen in a battery, making the car a kind of electric one.
The dream of producing hydrogen in the car while driving along by electrolyzing(电解)water is a long way off, so we are still at the period of batteries and filling the tank with hydrogen gas. This is the difficulty for potential car users and producers. There are only sixteen hydrogen filling stations in Los Angeles and none in 99% of other cities worldwide.
Indeed, some of the big name automobile producers have pulled out of the race to put the first practical hydrogen car on the streets. Ford and GM have announced that they are pulling out in America and so has Renault in France.
However, the Japanese companies are pressing on. In fact, Honda introduced its first hydrogen fuel cell car in 1999. They are now producing second generation hydrogen car known as the FCX Clarity. Guess where they are available for sale? In only one city because of its filling stations.
Honda thinks that they could go into full-scale production of the FCX Clarity by 2020 if the world is prepared for them by then.
Then there are hydrogen-powered buses in several European cities including Amsterdam, Barcelona, Hamburg, London, Luxembourg and Madrid. Lotus, the makers of London taxis, have announced that they propose to manufacture hydrogen-powered taxis in time for the London Olympics.
So, the hydrogen vehicle is out there and the numbers will be growing fairly soon. The buses go back to their bus station, where an electrolyzing machine changes water into fuel for them to fill up on and the same will be the case for many of London’s taxis.
Unfortunately, getting fuel is not the only difficulty for the average motorist, a number of these vehicles cost about $300,000 each.
【小题1】According to the text, hydrogen-powered buses ________.

A.can easily be filled up with gas.
B.are likely to sell well in the future.
C.are mainly used in the United States
D.won’t be used in the London Olympics
【小题2】What does the underlined word “them” in paragraph 5 refer to?
A.Japanese companiesB.Hydrogen buses
C.The FCX ClarityD.Filling stations
【小题3】Where are hydrogen cars currently available for sale?
A.In BarcelonaB.In HamburgC.In LondonD.In Los Angeles
【小题4】We can learn from the text that ________.
A.there are sixty hydrogen filling stations all over the world
B.hydrogen vehicles fueled by water will be very expensive
C.Honda will mass-produce the FCX Clarity by 2012
D.Honda produced its first hydrogen car in 1989

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There are two methods by which hydrogen (氢) can be used to power cars. The first way is to use hydrogen to drive the engine, in much the same way as many cars use gas. The second method is to use the reaction of hydrogen with oxygen in a battery, making the car a kind of electric one.

The dream of producing hydrogen in the car while driving along by electrolyzing(电解)water is a long way off, so we are still at the period of batteries and filling the tank with hydrogen gas. This is the difficulty for potential car users and producers. There are only sixteen hydrogen filling stations in Los Angeles and none in 99% of other cities worldwide.

Indeed, some of the big name automobile producers have pulled out of the race to put the first practical hydrogen car on the streets. Ford and GM have announced that they are pulling out in America and so has Renault in France.

However, the Japanese companies are pressing on. In fact, Honda introduced its first hydrogen fuel cell car in 1999. They are now producing second generation hydrogen car known as the FCX Clarity. Guess where they are available for sale? In only one city because of its filling stations.

Honda thinks that they could go into full-scale production of the FCX Clarity by 2020 if the world is prepared for them by then.

Then there are hydrogen-powered buses in several European cities including Amsterdam, Barcelona, Hamburg, London, Luxembourg and Madrid. Lotus, the makers of London taxis, have announced that they propose to manufacture hydrogen-powered taxis in time for the London Olympics.

So, the hydrogen vehicle is out there and the numbers will be growing fairly soon. The buses go back to their bus station, where an electrolyzing machine changes water into fuel for them to fill up on and the same will be the case for many of London’s taxis.

Unfortunately, getting fuel is not the only difficulty for the average motorist, a number of these vehicles cost about $300,000 each.

1.According to the text, hydrogen-powered buses ________.

A.can easily be filled up with gas.

B.are likely to sell well in the future.

C.are mainly used in the United States

D.won’t be used in the London Olympics

2.What does the underlined word “them” in paragraph 5 refer to?

A.Japanese companies

B.Hydrogen buses

C.The FCX Clarity

D.Filling stations

3.Where are hydrogen cars currently available for sale?

A.In Barcelona

B.In Hamburg

C.In London

D.In Los Angeles

4.We can learn from the text that ________.

A.there are sixty hydrogen filling stations all over the world

B.hydrogen vehicles fueled by water will be very expensive

C.Honda will mass-produce the FCX Clarity by 2012

D.Honda produced its first hydrogen car in 1989

 

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  What will power your house in the future? Nuclear, wind, or solar power? According to scientists at the Massachusetts Institute of Technology(MIT)in the US, it might be leaves-but man-made ones.

  Natural leaves are able to change sunlight and water into energy.It is known as photosynthesis(光合作用).Now researchers have found a way to copy this seemingly simple process.

  The man-made leaf developed by Daniel Nocera and his partners at MIT can be seen as a special chip with catalysts(催化剂).Similar to natural leaves, it can split water into hydrogen and oxygen when put into a bucket of water.The hydrogen and oxygen gases are then stored in a fuel cell(电池), which uses those two materials to produce electricity.

  A man-made leaf is not a new idea.The first man-made leaf was invented in 1997 but was too expensive and changeable for practical use.The new leaf, on the contrary, is made of cheap materials, easy to use and highly stable.In laboratory studies, Nocera showed that a man-made leaf prototype(原型)could operate continuously for at least 45 hours without a drop in activity.

  The wonderful improvements come from Nocera’s recent discovery of several powerful, new, inexpensive catalysts.These catalysts make the energy change inside the leaf more efficient with water and sunlight.Right now, the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one.Besides, the machine can run in whatever water is available; that is, it doesn’t need pure water.This is important for some countries that don’t have enough pure water.

  With the goal to “make each home its own power station” and “giving energy to the poor”, scientists believe that the new machine could be widely used in developing countries, especially in India and rural China.

(1)

What will give power to our house in the future, according to MIT?

[  ]

A.

Man-made leaves.

B.

Nuclear.

C.

Solar power.

D.

Wind.

(2)

Which of the following orders correctly shows how the man-made leaf is used to produce electricity?

a.man-made leaves split water into hydrogen and oxygen

b.the hydrogen and oxygen gases are stored in a fuel cell

c.the man-made leaves are put in water

d.the fuel cell uses hydrogen and oxygen to produce electricity

[  ]

A.

cbad.

B.

bcad.

C.

cabd.

D.

cadb.

(3)

What does the underlined “stable” in the 4th paragraph mean?

[  ]

A.

Secure.

B.

Powerful.

C.

Unnatural.

D.

Unchangeable.

(4)

The aim of the scientists at MIT in developing the new man-made leaves is to ________

[  ]

A.

build up more power stations in the world

B.

provide cheaper energy for developing countries

C.

offer people in developing countries access to pure water

D.

gain a deeper understanding of the photosynthesis process

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Officials say the islands of Tokelau in the South Pacific Ocean have become the world's first territory totally powered by the sun.The move is expected to save money and ease the environmental burden of depending on imported fossil fuels.

Tokelau's three main atolls(环状珊瑚岛),or islands,now have enough solar capacity to meet all of their electricity needs.Until now.Tokelau has been 100%dependent on diesel (柴油) for producing electricity.That has burdened the country with heavy economic and environmental costs.

The three atolls of Tokelau are about halfway between New Zealand and Hawaii and are administered by New Zealand.

Each atoll received its own solar power grid (电网)system.New Zealand officials estimated the cost of the project to build the three solar grids at around seven million dollars.The last of the grids has been completed.

It is estimated that oil imports make up to 30%of national income in some parts of the Pacific.The move to solar power could save Tokelau about one million dollars a year.Tokelau will now be able to spend more on social programs to help its citizens.

Other South Pacific islands are attempting similar projects.The island nations of Samoa and Tuvalu are aiming to get all of their electricity from renewable sources by 2020.The Cook Islands plans to start moving to solar panels and wind turbines.And most houses in the South Pacific groups of islands will begin to use solar water heaters.

East Timor's government has promised that no households in the capital,Dili,would be using firewood for cooking by 2015.It also says 50%of the country's electricity will come from renewable sources by the end of the decade.

New Zealand Foreign Affairs Minister Murray McCully says the country will hold a Pacific energy summit in March this year.He said the meeting would build on the success of clean and affordable energy solutions for Tokelau,Tonga,and the Cook Islands.

71.According to the text,       makes Tokelau develop renewable energy project.

A.the country's heavy economic and environmental burden

B.the country's abundant solar and wind sources

C.the country's excellent location in the Pacific

D.New Zealand's administration and strong support

72.We can know Tokelau used to spend about       dollars on oil imports every year.

A.seven million               B.one million

C.three million                   D.four million

73.What can we learn from the text?

A.Some houses in Tokelau still lack solar capacity.

B.Tokelau has partly depended on fuel electricity.

C.Tokelau doesn't use imported diesel to produce electricity now.

D.Not every atoll has its own solar power grid system in Tokelau.

74.All the island nations except      will get all of their electricity from renewable sources by 2020.

A.Samoa          B.Tuvalu          C.Tokelau                  D.East Timor

75.The text is mainly about       

A.Tokelau's solar power project

B.South Pacific islands’renewable energy project

C.Tokelau's social programme to help its citizens

D.the development of solar water heaters

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