Electric eels use charges to detect prey and also______them before they eat them.
A.stunned
B.to stun
C.stunning
D.to be stunned
A.stunned
B.to stun
C.stunning
D.to be stunned
根据你所听到的内容,回答:
A.The difficulty of breeding electric fish.
B.The medical importance of electric fish.
C.How certain fish use electricity.
D.How fish navigate.
The main idea of the third paragraph is that______.
A.a mature torpedo is capable of producing enough electricity to knock down a man
B.the mass of the fish decides the intensity of electric power it generates
C.the strength of shock given by a young electric ray can only light the bulb of a pocket flashlight
D.to make full use of the energy produced by electric fish, suitable wires should be available
A.residential consumption was 5.5 percent
B.the largest part of consumption was made by electric generation
C.private car consumption reached one-third of the total consumption
D.individual energy use took up the largest portion of the total consumption
A) was made
B) would have been made
C) has been made
D) had been made
A.Brition has used up almost all coal deposits
B.The demand for British coal has declined
C.Petroleum, water power, and electric power replacing coal for many purposes
D.The old British mines are narrow and deep, making it difficult to use machines
根据以下资料,回答6~10题。What do most electric car owners do every day? A) They charge the battery to travel hundreds of kilometers. B) They charge the battery so as to reach highway speeds. C) They recharge before the battery storage is used up. D) They use only a minority of the battery storage.
A.There is a charge for the use of the locker.
B.Showers are installed in the changing rooms.
C.Lockers are located in the changing rooms.
D.Lockers are used to store personal belongings.
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A.It eventually turns into heat.
B.It is used in a variety of forms.
C.Its use is chiefly responsible for air pollution.
D.Part of it is lost in the process of transmission.
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.
【C1】
A.information
B.reality
C.plot
D.story