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

[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

[名词解释] 电击（electric shock）

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

[名词解释] 电烧伤electric burn

[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]The crankshaft is of the semi built type, with the journal （） the forged or cast steel crank throws.A . being shrunk intoB . to be shrunk intoC . to be shrunk withD . shrinking into

[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

[试题]The new music was built out of materials already in______. (exist)：blues，rock'n'roll，folk music.

[单选题]The newly built café, the walls of_______ are painted light green, is really a peaceful place for us, specially after hard work.A． thatB． itC． whatD． which