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  3. Any good mystery must eventually uncover a villain, and in a recent documen

Any good mystery must eventually uncover a villain, and in a recent documen

游客2023-09-09  19
问题      Any good mystery must eventually uncover a villain, and in a recent documentary, "Who Killed the Electric Car?", the filmmakers duly pointed the finger at General Motors. The【C1】______ is not so simple, but there is little doubt that when GM pulled the plug on its EV1 battery-powered car a decade ago, other【C2】______ followed the Giant carmaker’s lead.
     Yet GM has now 【C3】______ its enthusiasm for electric vehicles — or at least for their close cousins, hybrid cars (混合动力汽车). At the upcoming auto show, the company is expected to【C4】______  a prototype that overtakes existing hybrids，【C5】______ Toyota’s Pruis.
     Today’s hybrids capture energy normally【C6】______ during braking and coasting and use it to power an electric motor that can provide extra bursts of【C7】______ when needed. The Pruis and other hybrids can also run【C8】______ battery power alone at low speeds over short distances, such as in stop-start traffic.
     But GM’s new car is expected to be a "plug-in" hybrid, which, as its name implied, can be recharged by 【C9】______ it into the mains (干线). Together with a big battery pack, this provides a much larger range in all-electric【C10】______ , after which the petrol engine kicks in. GM’s car is expected to go around 50 miles (80 km) in all-electric mode，【C11】______ enough for American commuters, who would need to use the 【C12】______ engine on longer trips only. The【C13】______ is that plug-in hybrids need a much larger and more costly battery pack．【C14】______ a Pirus to operate as a plug-in hybrid, as some enthusiasts have done, costs around ＄12,000.
     GM bosses have hinted that his company planned to put a plug-in into mass【C15】______  . It is an indication of how the pace is 【C16】______ in the race to develop more eco-friendly cars.
     Others are more【C17】______ . Carlos Ghson, the boss of Renault and Nissan, who is 【C18】______ for his skepticism towards hybrids, said he still had doubts that hybrid technology is【C19】______ for the mass market, stressing that plug-in hybrids will have to wait until battery technology improves. Toyota has also been【C20】______ about plug-ins, insisting the Pims’ approach is more convenient.  [br] 【C4】
选项 A、uncover
B、unveil
C、identify
D、expose
答案 B
解析 unveil a prototype推出(新型汽车)原型。unveil vt．揭开……面纱，首次展示；uncover vt．揭露；expose vt．使暴露。
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