题目内容
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"A nation on wheels" means that______.
A．the country is producing the best cars in the world
B．everyone 4n this country owns a car
C．cars play a very important role in people' lives
D．there are more cars than trains in this country
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更多“"A nation on wheels" means that______.A．the country is producing the best cars in the worl”相关的问题
"A nation on wheels" means that___________
A.the country is producing the best cars in the world
B.everyone in this country owns a car
C.cars play a very important role in people lives
D.there are more cars than trains in this country
A．Because Americans love making cars
B．Because Americans depend much on cars in their daily life
C．Because Americans constantly move from city to city in their cars
D．Because the car industry has earned the United States its reputation
ort, and convenience. These cars will float along never touching the ground, and therefore will have no need for wheels. Annoying highway vibrations, caused by the rotations of the disc-and-tire wheels, will be things of the past. The coming highway passenger cars will literally fly above the road, supported on columns of air compressed by
turbine-driven fans.
The car without wheels has been called a “flying car” , and, in a sense, that’ s just what it is; however, it will not back out of the family garage, start down the street, and then suddenly go quickly upward heading for some distant point. On the contrary, to avoid problems in aerial navigation, the wheel-less vehicle probably will travel no more than three inches above road surface. It will travel over fairly rough road and even over smooth water.
The inevitable problems of maritime regulations, severe weather conditions, and running out of fuel in remote areas all will require new concepts of operation, servicing, and vehicle regulation.
1.The author believes that cars of the future _______ .
A、will be replaced by airplanes
B、will have wheels unlike those of today
C、will u s e columns of air instead of wheels
D、will u s e wheels without tires
2.Cars of the future will run _______ .
A、without annoying noise
B、without fuel
C、much more smoothly
D、on a number of fans
3.The car without wheels has been called a “flying car” because _______ .
A、it travels a few inches above the ground
B、it can fly as a plane does
C、it moves at a very high speed
D、it can travel over smooth water
4.Where is a wheel-less car least fit to travel_____ .
A、Over soft land
B、Over rough country roads
C、Over highways
D、Over waterfalls
5.Wheel-less cars will _______ .
A、eliminate all traffic problems
B、create new traffic problems
C、eliminate parking problems
D、both A and C
Primitive human beings supplemented their own carrying of goods and possessions by starting to domesticate animals — training them to bear small loads and pull crude sleds. The invention of the wheel, probably in western Asia, was a great step forward in transport. As the wheel was perfected, crude carts and wagons began to appear in the Tigris-Euphrates valley about 3500 BC, and later in Crete, Egypt, and China. Wheeled vehicles could not use the narrow paths and trails used by pack animals, and early roads were soon being built by the Assyrians and the Persians.
The greatest improvements in transportation have appeared in the last two centuries, a period during which the industrial Revolution has vastly changed the economic life of the entire world. Crude railways — horse-drawn wagons with wooden wheels and rails — had been used in English and European mines during the 17th century. Although it first appeared in England, the railroad had its most dramatic growth in the United States. By 1840 more than 4800 km of railroads were already operating in the eastern states, a figure 40 percent greater than the total railroad mileage of Europe. Since World War I, however, the U.S. railroads have been in a decline, due partly to the rapid development of private automobiles, trucks, buses, pipelines, and airlines.
The first new mode of transportation to challenge the railroad was the motor vehicle, which was made possible by the invention, in the 1860s and 70s, of the internal combustion engine. The automobile found its greatest popularity in the United States, where the first "horseless carriages" appeared in the 1890s. Two hundred million motor vehicles had been produced in the nation within 70 years of their first appearance. The automobile thus became in many ways as important to the 20th century as the railroads had been to the 19th.
During the same period intercity buses took over a large portion of commercial passenger travel, and trucks began carrying a great deal of the nation's freight.
Although the emphasis on fuel conservation waned in "the 1980s, few doubt that the issue will emerge again when oil scarcities loom, as they did in the 1970s. Future possibilities include automobiles with far greater fuel efficiency and improved mass-transit systems. Both will occur not only in response to oil-supply disruption, but also as an answer to increasing demands for cleaner air. Improvements in mass transit offer the most promise for the future. Amtrak's 1993 introduction of the Swedish high-speed "tilting train" should cut travel time between some East Coast cities by almost half, once tracks are entirely electrified.
From the first paragraph, it can be inferred that transport exerts a great influence on all the following EXCEPT______.
A．economic development
B．living conditions
C．industrial production
D．political rights
The plane succeeded in carrying the boy on board with ______ in the air.
A．one wheel
B．two wheels
C．three wheels
D．four wheels
The plane succeeded in carrying the boy on board with ______ in the air.
A．one wheel
B．three wheels
C．two wheels
D．four wheels
The man who never tries anything new is a(n) ______ on the wheels of progress.
A．obstacle
B．brake
C．break
D．block
Merlin put wheels under his shoes in order to ______.
A．impress the party guests
B．arrive at the party sooner
C．test his invention
D．show his skill in walking on the wheels
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