單項選擇題The horizontal flat surfaces where the upper stock joins the rudder are the().

A.rudder keys
B.rudder palms
C.lifting flanges
D.shoes of the rudder


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1.單項選擇題The grip of a joint represents the().

A.thickness of the connected members
B.diameter of the head
C.entire length of the rivet
D.diameter of the shank

2.單項選擇題The fluke angle of an anchor system is the angle between the().

A.flukes and the shank
B.shank and the sea bottom
C.mooring line and the sea bottom
D.flukes and the shackle

5.單項選擇題The coastline between Point Judith and Watch Hill is().

A.steep with rocky bluffs
B.sandy and broken by rocky points
C.low and marshy
D.heavily forested