题目内容
现在的航海活动深刻得影响着人类的生活，与国民经济和人民生活密切相关的________ 等行业都有航海的贡献。The current maritime activities have profoundly affected the lives of human beings.______and other industries closely related to the national economy and people's lives are inseparable from the contribution of navigation..
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操作级指在________的指示下工作，按照规定的程序，履行指定责任范围内的所有功能保持直接控制的责任级别。The operational level maintains direct control over the performance of all functions within the designated area of responsibility in accordance with proper procedures and under the direction of for that area of responsibility.
世界贸易大约________的运输量，是通过海上进行运输。About ______of the world's trade is transported by ships at sea.
截止2017年年底全世界大约有________船员。At the end of 2017, there were about ______ sailors worldwide.
我国沿海航区的船长、驾驶员、轮机长和轮机员可分为________The competency certificates of Masters, deck Officers, Chief Engineers and Engineers for coastal navigation areas in China are classified as_______.
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