配件实行寿命管理,交叉杆轴向橡胶垫使用时间满6年必须报废。
参考答案:对
相对风险承受能力由一个人投入到风险资产的财富金额来衡量。( )
VHF Channel 6 is used exclusively for what kind of communications?()
A.Radio checks and time checks
B.Inter-vessel safety and search and rescue
C.Working with helicopters
D.Radio direction finding