题目内容
Ford, the second largest car maker in the world, celebrates its 100th birthday this month.And it is already looking forward to its next 100 years. Ford expects to have nearly half its cars powered by fuel cells by the year 2050.
In the meantime, another car maker in the US, General Motors (GM), is building the technology for cars to be powered by fuel cells.
So, what makes fuel cells so special? Why are car makers so enthusiastic (热衷的) about them?
Fuel cells are based on an electrochemical process. They change chemical energy from hydrogen (氢) and oxygen into electrical energy.
Fuel cells pollute much less than traditional power sources. They produce little more than water as a byproduct. Car makers expect them to cut CO2 emissions (散发) in half and so make cars more environmentally friendly.
Fuel cells are not dependent on oil supplies. Instead, they run on hydrogen, the most common element in the universe. And they can be refueled. Car makers expect fuel cells to lessen the industry’s need to rely on decreasing oil supplies.
Using fuel cells, without the traditional motor, engineers have many more possibilities for developing cars.
A fuel cell frame can last 20 years, so car bodies could change with drivers’ needs or even with the seasons and be replaced at will.
Owners could switch from a sports car to a family car while keeping the same fuel cell frame. This is a much cheaper solution to buying a whole new vehicle.
“A fuel cell car is more than just a new concept car, it’s the start of a revolution in how cars are designed, built and used.”Said GM Chief Executive Rick Wagoner.
While this may sound great, fuel cells are still too expensive to produce. For cars, they can be ten times the price of normal engines.
The current test models can cost US $1 million or more.
Besides Ford and GM, a number of other car makers are now testing fuel cell vehicles. And all are aiming for mass production by 2010. By that time, the cost of buying a fuel cell car should be as affordable as that of a traditional car.
1. The problem facing the fuel cell car is that ________.
A. it’ll be hard to produce in large quantities
B. it’ll be too dear for people to buy
C. people can’t get used to it
D. its body changes too quickly
2. The underlined word“they”(in Paragraph 6) refers to“________”.
A. hydrogen and oxygen B. car makers
C. fuel cells D. traditional power sources
3. The underlined word“lessen”(in Paragraph 6) probably means ________.
A. reduce B. keep C. display D. increase
4. It can be concluded that this article is mainly written for ________.
A. car experts B. car engineers C. general readers D. students of science
5. The main purpose of writing this article is ________.
A. to announce a business plan
B. to sell a new type of cars
C. to introduce a new type of car power source
D. to introduce two America’s car makers
提示:
| 1. While this may sound great, fuel cells
are still too expensive to produce. For cars, they can be ten times the price
of normal engines.
2.参见文章第六段。 3.从lessen的词形,即less+en可猜出其意思是减少。 4. 由于文章没有太多专业名词,所以对象应是一般读者,大众。 5.主旨题。
|
Although in 1947 we were still very new to the atomic age, we knew about mushroom clouds. A huge crack (裂缝) spread across the library wall upstairs, sending teachers and __31__ screaming down the hall.
Had a new world war started? Palefaced, our young science teacher quickly__32__us for a fire drill. We huddled (卷缩) in little groups on the beach side of the school grounds and__33__the spreading cloud darken the bright spring sky.
Rumors flew every which way,__34__two hours would pass before we got the full story. One rumor we heard was that the Texas City Monsanto Chemical plant had__35__; children whose parents__36__there began to cry.
I__37__—that was where my father was working that day.
The school bell called us back inside, and we were dismissed (解散) to__38__our way home the best way we could. I'd walked a quarter of the threemile trip to my home__39__a car horn frightened me to__40__. My Uncle Barney__41__alongside me in his old Ford. The instant I saw him, I knew my father__42__. Otherwise, Papa would have__43__for me himself.
As if in slow motion from a great distance, Uncle Barney motioned for me to__44__. Numb with grief, I crawled into the back__45__. I barely took notice of the man sitting there, and didn't recognize him until he__46__me. When Papa put his strong arms around me, I forgot for a moment that Cherokees aren't supposed to__47__.
Many of my fellow students lost their__48__in the explosion. Tragedy would one day come to our__49__, as it inevitably (不可避免地) comes to all, but one day Texas City blew up, it miraculously (奇迹般地) passed us by. Because he lost his keys on that April morning, as he explained, my father lived for__50__32 years—we were to have a second lifetime forever.
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