单项选择题
A.Cleanly/during B.Clear/meanwhile C.Clean/between D.Clean/prior to
A large basin cut into the shore，closed off by a caisso...
单项选择题A large basin cut into the shore，closed off by a caisson，and used for drydocking of ships is known as a（）.
A.slipway B.graving dock C.ground warp D.caisson dock
（） is not usually used in liquid cargo systems.A.Hydrau...
单项选择题（） is not usually used in liquid cargo systems.
A.Hydraulic drive systems B.Electric drive systems C.Steam drive systems D.Man-powered drive systems
（） is not one of the winch controls.A.a master controll...
单项选择题（） is not one of the winch controls.
A.a master controller or switchbox B.a group of relays C.contactors D.a solenoid brake
