[简答题] Natural gas Vehicles Kermit the Frog once said, "It’’s not that easy bein’’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 com

[单项选择] Natural gas Vehicles Kermit the Frog once said, "It’’s not that easy bein’’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 com
A. Y
B. N
C. NG