A.center of gravity
B.center of flotation
C.metacenter
D.metacentric height
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A.thirsty
B.sick or injured
C.wet
D.awake
A.Globe valve
B.Butterfly valve
C.Gate valve
D.Packless valve
A.center of gravity
B.metacenter
C.center of flotation
D.keel
A.Carefully and neatly erase the entryand rewrite it correctly
B.Remove this page of the log book and rewrite all entries on a clean page
C.Blot out the error completely and rewrite the entry correctly
D.Cross out the error with a single line and rewrite the entry correctly
A.cross out the error with a single line,and write the correct entry ,then initialit
B.carefully and neatly erase the and rewrite it correctly
C.remove this page of the log book , and rewrite all entries on a clean page
D.Blot out the error completely and rewrite the entry correctly
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Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
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The helm command PORT TWENTY means（）.
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The company should establish and maintain procedures to control all documents and date which are relevant to（）.
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