單項選擇題A band or collar on the top end of a boom to which the topping lift，midships guy，and outboard guys are secured，is called the（）.
A.collar band
B.guy band
C.pad eye collar
D.spider band
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1.單項選擇題（）is 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
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題型：單項選擇題