单项选择题
A.metal B.wood C.water D.plastic
（）is electricity that is flowing where it’s not suppose...
单项选择题（）is electricity that is flowing where it’s not supposed to through water, fittings on your boat, wet wood, damp surfaces, etc.
A.Stray current B.Rated current C.Starting current D.Earth current
During steering gear test should be moved through its f...
单项选择题During steering gear test should be moved through its full travel in both directions（）
A.pump B.the cylinder C.the hunting gear D.the rudder
The（） of the telemotor is mounted on the steering gear....
单项选择题The（） of the telemotor is mounted on the steering gear.
A.transmitter B.receiver C.pipes D.charging unit
