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  3. The dream of personalised flight is still vivid in the minds of many inventors, some developing cycle-powered craft, others【C1】_

The dream of personalised flight is still vivid in the minds of many inventors, some developing cycle-powered craft, others【C1】_

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问题     The dream of personalised flight is still vivid in the minds of many inventors, some developing cycle-powered craft, others【C1】________money into jetpacks (喷气飞行背包). However, the flying car has always remained the【C2】________symbol of personal transport freedom.
    Several companies around the world have produced【C3】________that can drive on roads and fly. Airbus has a futuristic modular (组件式的) concept involving a passenger capsule that can be【C4】________from the road-going chassis (底盘) and picked up by a helicopter-type machine.
    But all these concepts are massively expensive, require safety certification standards for road and air, need【C5】________controls, involve complex folding wings and propellers, and have to be flown from airstrips. So they are likely to remain rich people’s playthings rather than practical transport solutions for the masses.
    "A car that takes off from some London street and lands in another【C6】________street is unlikely to happen, " says Prof. Gray, a leading aeronautical engineer. "Sky taxis are much more likely. " But that won’t stop inventors from dreaming up new ways to fly and trying to persuade investors to back their sometimes【C7】________schemes.
    Civilian aviation is being disrupted, not by the age-old desires for speed, romanticism and【C8】________, but by the pressing need to respond to a changing climate. New electric engines coupled with artificial intelligence and【C9】________systems will contribute to a more efficient, integrated transport system that is less polluting and less noisy. That may sound simple, but as Prof. Gray says, "When I travel somewhere I like this notion that when I finish my journey I feel better than when I started it. That’s completely at【C10】________with how I feel today. " Now that would be progress.
    A) autonomous    F) odds        K) random
    B) detached      G) opposites   L) repressing
    C) dual          H) outrageous  M) segmented
    D) glamour       I) pouring     N) spectrum
    E) imminent      J) prototypes  O) ultimate
【C3】
选项
答案J
解析 名词辨析题。空格前为动词，空格后是that引导的定语从句，且that作从句的主语，故空格处应填入名词，既充当produced的宾语，又充当后面定语从句的主语。空格后的定语从句提到“既能在地面行驶，又能在空中飞行”，由此推测空格处填的名词应与交通工具相关，故选J项prototypes“(新型汽车、机器等的)原型，雏形”。
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