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________ ：The main center-line structural member，running fore and aft along the bottom of a ship，sometimes referred to as the backbone．
A.Frame
B.Deckbeam
C.Stringer
D.Keel
参考答案
更多 “ ________ ：The main center-line structural member，running fore and aft along the bottom of a ship，sometimes referred to as the backbone．A.FrameB.DeckbeamC.StringerD.Keel ” 相关考题
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Make fast fore and aft!B
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any deck below the main deck and above the lowest deckB
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a heavy fore-and-aft beam under the deck
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