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当前学科：油轮船员考试
题目：
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（）应装有能原油洗舱时进行液位监视使用的装置。
A . 货控室内
B . 甲板上
C . 泵舱内
D . A+B+C
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促进利他行为可以通过（）。
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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