单项选择题
A.ISM B.DOC C.SMC D.PSC
Christopher Columbus （） eighteen years （） planning for ...
单项选择题Christopher Columbus （） eighteen years （） planning for that wonderful voyage which he made across the Atlantic Ocean.
A.spends；in B.spent；on C.has spent；on D.had spent；in
Water can’t be used to put out fires of （）A.Class AB.Cl...
单项选择题Water can’t be used to put out fires of （）
A.Class A B.Class B C.Class C D.B+C
（）means the person designated as responsible for the de...
单项选择题（）means the person designated as responsible for the development, implementation, revision and maintenance of the port facility security plan and for liaison with the ship security officers and company security officers.
A.Ship security officer B.Company security officer C.Port facility security officer D.PSC officer
