單項(xiàng)選擇題

A.metacentric height is positive
B.metacentric radius is positive
C.KG exceeds maximum allowable limits
D.free surfaces are excessive

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A.painted red and labeled
B.concealed from the crew
C.protected by plexiglass
D.padlocked

A.warning, keep off,stay clear
B.danger, do not board
C.warning, no smoking, no open lights, no visitors
D.dangerous cargo being transferred

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