题目内容

Electricity, like clean water, is a resource that’s often taken for granted. But last summer, when blackouts struck much of the northeastern US, Ontario and Rome, consumers on two continents were given a painful reminder of just how easily broken electricity supplies can be. The massive disorder stranded (使陷入困境)commuters, stopped freezers, shut down businesses and refocused attention on where most of the planet’s power comes from:oil-and-gas-fired generators and nuclear plants, These sources not only pollute the environment but also make many consumers feel unacceptable health risks.

Companies are trying to offer an alternative, clean energy from renewable resources that’s plentiful and portable. Lifton’s Medis Technologies, as well as companies like Hydrogenics and Nanosys, is tapping into fuel cells and dolor panels to give people power whenever and wherever they want it, free from dependence on local grids(电网).

The search for alternative energy is nothing new, but the current trend of innovators is focusing on the goal of making clean and sustainable power a mainstream commodity. For example, the fuel cell, which produces electricity from the chemical reaction between oxygen and hydrogen, has been around for about 150 years, though its commercial development did not begin until the 1960s and then only as part of NASA spacecraft. Today this technology is coming down to Earth in places like Tokyo; in nine European cities, from Stockholm to Porto, each operating three hydrogen-fuel-cell buses; and in Iceland, which is trying to create the first fuel free hydrogen economy by 2030.

When hydrogen and oxygen molecules(分子)combine, the reaction produces heat and water. Fuel cells use this reaction to generate electricity. With the cell phone and gadget(小机件)market in mind, Medis has developed a fuel cell with cheap components that produces little heat and effortlessly reduces waste water without turning to energy consuming pumps.

What is the passage mainly about?

A.The future of alternative energy

B.How the fuel cells works

C.People’s search for alternative energy

D.The damage done by the blackout last summer.

What can we know about the fuel cell?

A.Its commercial use began in the 1960s.

B.Today it’s being used in almost every corner of the world.

C.It has been in widespread used for about 150 years.

D.It supplies electricity to make the combination of oxygen and hydrogen possible.

Which of the following statements is NOT true according to the passage?

A.Lifton’s Medis Technologies is tapping into fuel cells and solar panels.

B.The fuel cell has been around for about 150 years.

C.The fuel cell’s commercial development did not begin until the 1960s.

D.When hydrogen and oxygen molecules combine, the reaction produces o2 and H2O.

The underlined word “blackouts” in the 1 st paragraph means_____.

A.power failure                 B.the delivering of electricity

C.the power of electricity         D.power station

【小题1】C

【小题2】A

【小题3】D

【小题4】A


解析:

【小题1】 通读全文可知,本文主要是介绍人们为寻找环保、安全的能源而开展的调查研究。

【小题2】由第三段的内容可知。

【小题3】由最后一段的内容可知。

【小题4】  由第一段的内容可知, blackout在此指停电。

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From the beginning rivers have played an important in the life of man.Man of the earliest times used the rivers as a means of travel.Today rivers still serve as a great waterway for the transport and people.

In ancient times, man settled near rivers or on river banks and built up large empires.

Water is nature’s most valuable gift to man.Man needs water to irrigate his crops, to cook and to wash.In nations all over the world, rivers mean life and wealth.They feed and clothe the nations around them.

Water is also a source of energy and power.Man build huge dams across the rivers to control the water for irrigation and get the energy needed to drive generators.The electrical power is then directed to homes, cities, factories and television stations.

Man uses water each day.In a small way rivers help to keep man in good health and provide for his amusements.Various forms of water sports keep man strong and healthy.

1.Rivers have been important to man _______.

A.since they came into being               B.since the last century 

C.since a few hundred years ago.          D.since the beginning of BC

2.Man in old times traveled from one continent to another ______.

A.by air       B.by sea           C.by train         D.by bus

3.Generators are machines that are used ______.

A.to direct electrical power           B.to control the water

  C.to produce electricit               D.to build dams y

4.Which of the following statements is true?

A.People get energy by building bridges across rivers.

B.In ancient times large empires grew up near dams.

C.People can be provided with amusements in small rivers.

D.Large rivers are still useful for transportation in modern times.

 

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