单项选择题
An illness preferably of an infectious nature seizin more than two persons on board at the same time defines（）.
A.disease of crew
B.crew illness
C.group illness
D.mass disease
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相关考题
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单项选择题
Areas which cannot be scanned by the radar of the vessel because they are shielded by parts of its superstructure, masts,etc means（）.
A.blind sectors
B.sheltered area
C.unseen area
D.unscan ble area -
单项选择题
Compatibility of goods states（）.
A.the method for the proper stowage of a dangerous cargo
B.the necessity of lashing, securing and piling of awkward or lengthy cargo
C.whether different goods can be stowed together in one hold
D.ventilation method for hydrous cargo -
单项选择题
Course directed by the 0SC or CSS to be steered at the beginning of a search is（）.
A.original course
B.initial course
C.final course
D.designated course
