单项选择题

The purpose of sheer in ship construction is to（）.

A.allow the ship to ride waves with drier decks
B.eliminate the need for butt straps
C.eliminate the need for margin plates
D.give greater strength at the deck edge

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单项选择题

The procedure of strengthening damaged structures on a ship by using wood or steel is called（）.

A.bracing
B.battening
C.blocking
D.shoring

单项选择题

The pillar shape that gives the greatest strength for the least weight is the（）.

A.octagonal pillar
B.H Beam pillar
C.I Beam pillar
D.circular type pillar