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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.
【C2】
选项 A、combined
B、shrank
C、separated
D、multiplied
答案D
解析 本题考查上下文语义。上文指出火车技术似乎发展缓慢，本句以汽车技术的持续发展作对比：各种创新……；下文也提到汽车行业的新发明层出不穷。因此multiply代入，指“创新大量出现”符合文意。shrink与文意相反；文中也并未提到创新要“合并”或“分离”，排除combine与separate。
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