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Test 3
Directions: Fill in each blank with a proper word chosen from the box. Each
word can be used only once. Note that there is one word more than you need.
A
A.battle B.built-in C. candidate D.carbon-free E. commercial F. contained
G. costly H. demonstrated I. footprint J. financed K. growing
Several Carmakers Push Plans to Offer Hydrogen-powered VehiclesSeveral big automakers recently
announced plans to keep investing in hydrogen vehicle technology. The plans come even as many industry experts
believe the technology faces a major uphill 1 to compete against battery-powered electric cars.
Hydrogen-powered cars are also known as fuel cell electric vehicles, or FCEVs. With these vehicles, fuel
cells convert (转化 ) hydrogen gas into electricity. This differs from electric vehicles, or EVs, which get their
power from a 2 battery.
Last month, the chief of Japan’s Toyota Motors, Akio Toyoda, attended a race that 3 an
experimental hydrogen vehicle. The vehicle 4 a traditional gasoline-powered engine that had been
converted to run on hydrogen.
Toyoda told reporters at the event such conversions could keep traditional internal combustion engines (内燃
机 ) running in a 5 world. This, he said, could avoid the need to completely leave behind internal
combustion and save millions of auto industry jobs.
In Germany, BMW and Volkswagen Group are both developing hydrogen-powered passenger vehicles along
with a series of new EVs. BMW said last month it has developed a hydrogen prototype (原型) based on its X5
model in a project partly 6 by the German government.
Officials at South Korean automaker Hyundai have also spoken about the importance of continuing to
explore hydrogen-based vehicles along with developing EVs. The company currently sells a passenger fuel cell
vehicle called the NEXO. And Hyundai announced it plans to offer hydrogen fuel cell versions for all its 7
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