单项选择题
A.7sB.8sC.9sD.10s
A.10sB.12sC.15sD.20s
A.0B.-0.1〜-0.5mC.-0.3m〜-0.5mD.-0.3〜0.8m
A.调整舱内所装货物B.在里档打压载水C.在里档甲板任意部位装些甲板货D.A+B+C
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