20.In ship construction, beams are transverse girders which provide support to _______.
A.bulkheads
B.deckhouse structure
C.decks
D.vertical frames
正确答案是C
20.In ship construction, beams are transverse girders which provide support to _______.
A.bulkheads
B.deckhouse structure
C.decks
D.vertical frames
正确答案是C