[填空题] Natural-gas Vehicles
Kermit the Frog once said, "It’s not that easy be in green." Although he wasn’t referring to cars, his observation seems particularly appropriate for the auto industry today: Designing, developing and marketing "green" cars has not been an easy task, which is why gasoline-powered vehicles still rule the road and fossil fuels still account for almost 75 percent of the world’s energy consumption. As gasoline prices soar and concern over harmful emission mounts, however, cars that run on alternate fuel sources will become increasingly important. A natural-gas vehicle, or NGV, is the perfect example of such a car -- it’s fuel-efficient, environmentally friendly and offers a relatively low cost of ownership.
Natural Gas Basics
The word "gas" is a confusing term because it is used to describe many different substances that are similar but not exactly the same. For example, the "gas" you put in your car is gasoline, one component of crude o

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[填空题] Natural-gas Vehicles
Kermit the Frog once said, "It’s not that easy be in green." Although he wasn’t referring to cars, his observation seems particularly appropriate for the auto industry today: Designing, developing and marketing "green" cars has not been an easy task, which is why gasoline-powered vehicles still rule the road and fossil fuels still account for almost 75 percent of the world’s energy consumption. As gasoline prices soar and concern over harmful emission mounts, however, cars that run on alternate fuel sources will become increasingly important. A natural-gas vehicle, or NGV, is the perfect example of such a car -- it’s fuel-efficient, environmentally friendly and offers a relatively low cost of ownership.
Natural Gas Basics
The word "gas" is a confusing term because it is used to describe many different substances that are similar but not exactly the same. For example, the "gas" you put in your car is gasoline, one component of crude o

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Kermit the Frog once said," It’s not that easy being green. "Although he wasn’t referring to cars, his observation seems particularly appropriate for the auto industry today: designing, developing and marketing "green" cars has not been an easy task, which is why gasoline-powered vehicles still rule the world and fossil fuels still account for almost 75 percent of the world’s energy consumption. As gasoline soar and concern over harmful emission mounts, however, cars that run on alternate fuel sources will become increasingly important. A natural-gas vehicle, or NGV, is the perfect example of such a car -- it’s fuel-efficient, environmentally friendly and offers a relatively low cost of ownership. Natural gas basics
The word" gas" is a confusing
A. comparatively low price of fossil fuels
B. reducing less harmful emissions
C. difficult tasks to design, develop and sale "green" cars
D. high fuel efficiency and protecting environment

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