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  3. Compared with other modes of transport, train technology might seem to be progressing as slowly as a suburban commuter service r

Compared with other modes of transport, train technology might seem to be progressing as slowly as a suburban commuter service r

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问题     Compared with other modes of transport, train technology might seem to be progressing as slowly as a suburban commuter service rattling its way from one station to another. Automotive technology,【C1】______, changes constantly: in the past decade satellite-navigation systems, hybrid power trains, proximity sensors and other innovations have【C2】______Each time you buy a new car, you will【C3】______a host of new features. Progress is【C4】______in aircraft, too, with【C5】______in in-flight entertainment and communication, fancy seats that turn into beds, and quieter and more efficient engines. Trains,【C6】______, appear to have changed a lot less.
    This【C7】______is not entirely fair.【C8】______, people buy their own cars, so they pay more attention to automotive innovation. Carmakers are【C9】______in a constant arms race, trumpeting new features as a way to【C10】______their products. Nobody buys their own trains. Similarly, air passengers have a choice of【C11】______airlines and are far more likely to be aware of the【C12】______of rival fleets than they are of different types of train.【C13】______, trains have longer lives, so technology takes longer to become【C14】______The planning horizon for one rail project【C15】______to 2050.
    【C16】______there is no【C17】______of new ideas, and they are steadily making their way out onto the rails. Better technologies are【C18】______everything from improved traction, braking and route-planning to sleek levitating trains(流线型悬浮列车)designed to glide on air at an astonishing 500kph. Energy-efficiency and safety are up, and derailments are down. There are schemes to【C19】______electrical energy from braking trains into local power grids, and even more【C20】______plans for "moving platforms" that dock with high-speed trains.
【C7】
选项 A、conclusion
B、criticism
C、contention
D、comparison
答案D
解析 本题考查上下文语义。空格处填入的名词前有限定词this，表明该名词是回指上文提到的内容。上文是对于火车技术和其他交通方式的技术进步的比较，comparison符合文意。而下文也是从比较人们对火车和其他交通方式的技术进步的关注度不同，来论述本句观点的，因此comparison也能领起下文。其他项代入，conclu—sion并不能概括上文的所有内容，也无法很好地衔接下文内容；而文中对“火车技术似乎进步缓慢”并没有批评，也没有就此引出争论，排除其他两项。
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