单项选择题
If you must make an electricity connection in a poorly accessible spot, solder it and seal it against （）
A.metal B.wood C.water D.plastic
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.
单项选择题 During steering gear test should be moved through its full travel in both directions（）
单项选择题 The（） of the telemotor is mounted on the steering gear.
