Electric vehicles are broadly categorized into()groups based on the electric d powertrains.

B.Generating electric power for passing vehicles. C.Providing clean energy to

[名词解释] 电击（electric shock）

[名词解释] 电烧伤electric burn

[主观题]When you are finished with the electric iron, don’t forget_____(关掉它). (turn)

[单选题]E．lectric insulation is made of organic substances and so gradually______with ageA．deterioratesB．increasesC．are fouledD．becomes better

[单选题]If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur?（）A . A pawl，forced by a spring mechanism，will engage the teeth of the bull gear and hold the loadB . An electromagnetic brake will

[单选题]An electric heater built into some smaller diesel engines is used to （）.A . raise lube oil viscosity for easier starting in cold weatherB . increase air inlet temperatureC . increase compression ratioD . increase jacket water temperature for easier s

[单选题]D．iesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to _____________.A．higher speed requiredB．flywheel-effectC．lower starting

[单选题]It was well known that Thomas Edison _____ the electric lamp.A.discoveredB.

[单选题]It was well known that Thomas Edison _____ the electric lamp.A.discoveredB.