问题
单项选择题
Beams are cambered to().
A.increase their strength
B.provide drainage from the decks
C.relieve deck stress
D.All of the above
答案
参考答案:B
Beams are cambered to().
A.increase their strength
B.provide drainage from the decks
C.relieve deck stress
D.All of the above
参考答案:B