()does it take to change the main engine from ahead to astern?
为了保证船舶航行安全,首先要确定船舶的航向与位置。船舶定位方法按照参照目标可分为( )。
下列关于船舶安全检查的说法中,正确的是()。
Ⅰ、船舶接受安全检查时,陪同检查的船员引导检查人员即可
Ⅱ、船舶接受安全检查时,陪同检查的船员应按检查人员要求,调试、操纵有关设备
Ⅲ、中国籍船舶接受安全检查时出示船舶安全检查记录簿
During the project, requirements change for a variety of reasons. As needs change and as work proceeds, additional requirements are derived and changes may have to be made to the existing requirements. It is essential to manage these additions and changes efficiently and effectively. To effectively analyze the impact of the changes, it is necessary that the source of each requirement is known and the rationale for any change is documented. The project manager may, however, want to track appropriate measures of requirements volatility to judge whether new or revised()are necessary.
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