单项选择题
The type of joint formed when a third small plate is riveted over two plates butted together is called a（）.
A.butted joint B.lap joint C.strap joint D.stringer joint
单项选择题 The system of valves and cargo lines in the bottom piping network of a tanker that connects one section of cargo tanks to another section is called a（）.
单项选择题 The strictest load line regulations apply to（）.
单项选择题 The shearing stresses on a ship’s structure are usually greatest at（）.
