For ships constructed on or after 1 July 2014, a minimum of______ two-way 双工portable radiotelephone apparatus for each fire party for fire-fighter's communication shall be carried on board.(1.0)
A.one B.two C.three D.four正确答案B
For ships constructed on or after 1 July 2014, a minimum of______ two-way 双工portable radiotelephone apparatus for each fire party for fire-fighter's communication shall be carried on board.(1.0)
A.one B.two C.three D.four正确答案B
