An electric heater built into some smaller diesel engines is used to （）.

They built a fireplace to heat the small flat, but there were nights when the fi

[单选题]A heater in the circuit facilitates warning of the engine prior to （） by circulating hot water.A . startingB . stoppingC . to startD . to sto

fuel/oil heater exchanger()A. 燃/滑油热交换器B. 伺服燃油加热器C. 燃油/液压油热交换器

The subway is also widely used in some cities. In small towns and cities, walkin

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

[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