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（）.
单项选择题 The normal tendency for a loaded tanker is to（）.
单项选择题 The maximum theoretical stress that can be developed on a guy in a yard and stay rig is limited by the（）.
