题目内容
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Cars moved very. slowly in the 1920s, but they ______ more quickly than in the 1910s.
A．were to move
B．would move
C．did move
D．do move
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更多“Cars moved very. slowly in the…”相关的问题
Cars moved very slowly in the 1920s, but they______move more quickly than in 1910.
A．were to ,can
B．did
C．will
D．can
Cars moved very slowly in the 1930s, but they ______ move more quickly than in the 1920s.
A．were to
B．did
C．will
D．can
—Cars moved very slowly in the 1920's.—Yes, but they ______ move more quickly than 1910.
A．were to
B．did
C．will
D．can
A.were to
B.did
C.will
D.can
Why were cars considered the problem in colonial towns？
A．Carts scared the pigs away.
B．Carts injured a large number of people.
C．Carts often moved too slowly.
D．Carts broke down too easily.
Some people suggest for better roads, others for cars to be banned (禁止) from city centers and yet others say better public transport would attract drivers from their lonely and boring journeys.
But the important question is what natural power creates a big city center. We are, after all, in an age of electronic communication; our big shopping areas have moved out of city centers, and our living areas moved out of them long ago.
Yet some force causes offices and service industries related to them to gather in London or New York or Tokyo. This suggests that far from the problems of a crowded environment forcing companies and people to move out, there is a critical (重大的) size beyond which more companies are attracted to move in. Nobody seems to know why, yet the answer is important to the way traffic jam is dealt with.
Which of the following is NOT mentioned in the passage as the cause of the traffic problem？
A．The poor public transport.
B．The over-concentration of shopping centers.
C．The great number of cars in the city centers.
D．The bad road conditions.
听力原文： One of the main complaints of city residents, not surprisingly, is the lack of parking. This problem is partly caused by all the abandoned cars on the streets. It has been estimated by A to Z Towing, Inc., a nationwide tow-truck agency, that over one million cars are abandoned on the streets and alleyways of the nation's cities. Each year approximately a third of those cars are moved and destroyed. The rest of the cars which are not removed take up parking spaces and make neighborhoods look rundown.
A survey of twenty cities by A to Z reports that as much as 30 million dollars is spent annually to tow away and dismantle abandoned vehicles. One city alone, Los Angeles, spends five million dollars a year to control the accumulation of abandoned cars on its streets. Even though the city spends so much money on the program, it is always fighting a losing battle as more and more cars are constantly coming off the production line.
Boston, on the other hand, which spends most of its money on museums and libraries, does not appropriate tax money to clean abandoned cars off the streets. In Boston the problem has been dealt with by a non-profit governmental agency called Street Horizons, which uses the money from the recycling of the metal in the cars to pay for the cost of towing them The program in Boston sounds good although it has not completely reached financial independence from the federal government yet. Until a truly self-sufficient program for removing old cars is developed, it will remain a serious problem
(33)
A．Around four hundred thousand cars.
B．Thirty million old cars.
C．One million junked cars.
D．Five million cars altogether.
听力原文： When the automobile was first invented, few people thought of buying one. Gradually, as cars were improved, more people wanted to buy them. Men tried to think of new and better ways to manufacture automobiles. Finally, Henry Ford set up a factory with an assembly line to produce automobiles.
Even with his new system of manufacturing the automobile industry remained fairly small. Almost all the assembly work was done in a few large factories near Detroit, Michigan. Then the cars were shipped to wholesalers all over the country. Wholesalers bought the cars from the factory and sold them to auto traders in each city. The traders then sold the cars to the people who wanted to buy them.
During the 1920s, this system began to change. The automobile industry had grown rapidly. Soon it was no longer practical to have assembly plants in Detroit only. New plants were built all over the country. With plants near each trader, the wholesaler' s job was unnecessary. The traders could buy cars directly from the factory.
Many other kinds of industries have moved their factories from the cities to small towns. In place of large factory, these companies now have several smaller plants. Like the automobile industry, they have found that many small factories can be more efficient than fewer large plants.
(34)
A．A factory with more automobiles.
B．A factory with improved cars.
C．A factory with an assembly line.
D．A factory with few people.
Wide World of Robots
Engineers who build and program robots have fascinating jobs. These researchers tinker(修补) with machines in the lab and write computer software to control these devices. “They’re the best toys out there,” says Howle Choset at Carnegie Mellon University in Pittsburgh. Choset is a roboticist, a person who designs, builds or programs robots.
When Choset was a kid, he was interested in anything that moved — cars, trains, animals. He put motors on Tinkertoy cars to make them move. Later, in high school, he built mobile robots similar to small cars.
Hoping to continue working on robots, he studied computer science in college. But when he got to graduate school at the California Institute of Technology in Pasadena, Choset’s labmates were working on something even cooler than remotely controlled cars: robotic snakes. Some robots can move only forward, backward, left and right. But snakes can twist(扭曲) in many directions and travel over a lot of different types of terrain(地形). “Snakes are far more interesting than the cars,” Choset concluded.
After he started working at Carnegie Mellon, Choset and his colleagues there began developing their own snake robots. Choset’s team programmed robots to perform. the same movements as real snakes, such as sliding and inching forward. The robots also moved in ways that snakes usually don’t, such as rolling. Choset’s snake robots could crawl(爬行) through the grass, swim in a pond and even climb a flagpole.
But Choset wondered if his snakes might be useful for medicine as well. For some heart surgeries, the doctor has to open a patient’s chest, cutting through the breastbone. Recovering from these surgeries can be very painful. What if the doctor could perform. the operation by instead making a small hole in the body and sending in a thin robotic snake？
Choset teamed up with Marco Zenati, a heart surgeon now at Harvard Medical School, to investigate the idea. Zenati practiced using the robot on a plastic model of the chest and they tested the robot in pigs.
A company called Medrobotics in Boston is now adapting the technology to surgeries on people. Even after 15 years of working with his team’s creations, “I still don’t get bored of watching the motion of my robots,” Choset says.
16. Choset began to build robots in high school.
A. Right
B. Wrong
C. Not mentioned
The air cushion under a hovercraft is produced by a large fan which blows air downwards between the craft and the water or ground, and so lifts up the craft. The air is main-rained at higher than atmospheric pressure by a flexible rubber "skirt" around the bottom edge of the hovercraft, preventing leakage of air from the cushion. Because the hovercraft floats on the air cushion with no contact between the craft and the surface below, it can travel over flat, rough ground or water with ease.
Hovercraft are usually driven by air screws like propellers (螺旋桨), which face back-wards and "push" the craft forwards, and can be turned to direct the hovercraft. Since there is no propeller dipping below the craft, hovercraft can travel up slopes out of the water, or land on beaches.
Cockerell's Air Cushion Vehicles, or ACVs, are now familiar to everyone and like all inventions, they have been improved upon. British Sea speed hovercraft have been carrying passengers and cars across the English Channel since 1968. They now have a "stretched" version of their Mountbatten Class hovercraft which can carry up to 60 cars and 416 passengers between Britain and France in a little over half an hour.
A new, large-sized hovercraft, designed and built in France, called the Sedam N500 of Naviplane, has now goneinto service. The 155 tonne N500 is 50 metres long (162 feet) and 23 metres wide (76 feet) and can carry 65 cars, plus five coaches, together with 400 passengers. When the sea conditions are ideal the N500 can reach 112 kph (70 mph).
A variation of the hovercraft principle is the sidewall ACV, which is more economical than the flexible skirt models, and easier to control, but it cannot be used on land. The United States Navy have been experimenting with warships based on the sidewall principle, and some of these may well reach a speed of 160kph (100mph).
The hovercraft ______.
A．are moved forward by propellers
B．travel on a cushion of air
C．are lifted up by a flexible rubber "skirt"
D．move faster on land than on water
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