单选题A continuous watertight bulkhead is normally also a (n)（）.Astructural bulkheadBexterior bulkheadCcerterline bulkheadDjoiner bulkhead
单选题
A continuous watertight bulkhead is normally also a (n)（）.
A
structural bulkhead
B
exterior bulkhead
C
certerline bulkhead
D
joiner bulkhead
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