题海让大学四年没有难题
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单选题 Right at the top is_______. It is 300 mm long and 25 mm wide with its upper edge in line with the uppermost continuous watertight deck. ( )

A. the deck line

B. Plimsoll disc

C. Plimsoll line

D. summer load line

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时间:2026-05-24 08:16:17

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