单项选择题
A.at its goose neck to such a extent B.at it's goose neck to such an extent C.at it's goose neck for such a extent D.at its goose neck to such an extent
Our ship is more than 150 meters in（）.A.heightB.breadth...
单项选择题Our ship is more than 150 meters in（）.
A.height B.breadth C.depth D.length
Our jumbo boom can（）20 tons.A.liftB.riseC.elevateD.hois...
单项选择题Our jumbo boom can（）20 tons.
A.lift B.rise C.elevate D.hoist
On which type davit does the davit head stay at the sam...
单项选择题On which type davit does the davit head stay at the same height?（）
A.Radial B.Sheath-screw C.Quadrantal D.Gravity
