单选题A vessel is constructed with a steel hull and an aluminum superstructure. Which statement is TRUE?（）AThe aluminum will provide greater resistance to the spread of fire by conductionBThe aluminum structure is usually attached to a steel coaming by a method that insulates the two metalsCIf the superstructure is stressed，an aluminum structure requires additional expansion joints to prevent fractureDThe steel at the area of the aluminum-to-steel connection must be closely checked for galvanic corrosion
单选题
A vessel is constructed with a steel hull and an aluminum superstructure. Which statement is TRUE?（）
A
The aluminum will provide greater resistance to the spread of fire by conduction
B
The aluminum structure is usually attached to a steel coaming by a method that insulates the two metals
C
If the superstructure is stressed，an aluminum structure requires additional expansion joints to prevent fracture
D
The steel at the area of the aluminum-to-steel connection must be closely checked for galvanic corrosion
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