The objectives of the ISM Code are to ensure _____.
A. safety at sea
B. prevention of human injury or loss of life
C. avoidance of damage to the marine environment and to property
D. All of the above
In a diesel engine, when installing new piston rings it is important to check_______Iring
A. I only
B. II only
C. both I and II
D. neither I nor II
应特别注意保证核动力厂运行规程与其预期的()相一致。
A. 使用环境
B. 运行指令
C. 管理程序
D. 技术程序
内啮合齿轮泵主、从动元件转向________。
A. 相同
B. 相反
C. A、B都有
D. 顺时针转相同，逆时针转相反
微信支付 
支付宝支付