正确答案: B

空舱

题目：在加热系统中，除()外，在其他任何情况下，应有设施来保证在管系中保持比舱内货物作用于管系的最大压力还要高的压力。

解析：B

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学习资料的答案和解析：

[单选题]________ the clock 20 minutes ahead for local time

Adjust

[单选题]我国《海船船员发证规则》规定，专业性评估不合格者，海事管理机构可根据评估的实际情况要求其重新______或对其签发以其评估后确认的能力相适应的______的适任证书。

培训和考试/较低等级、职务

[单选题]活塞环槽磨损后影响

平面间隙

[单选题]第一组An automatic system usually consists of a control system and an information system. A control system is a system which measures the condition of some entity and, with the information, governs the state of a variable; i.e., speed, temperature, pressure, position, etc. The open-loop system is the simplest form. a control system may assume. It is distinguished from the closed-loop system by the lack of an input which measures the state of the controlled variable; such an input is called a feedback. In modern ships the open-loop system has practically disappeared and the closed-loop system which operates with a feed-back is extensively used. An information system serves the parallel function of monitoring system or plant performance. The monitoring function may serve a number of purposes; specifically it may indicate values of controlled variables to guide remote control operations, warn of off-limit conditions and provide record of performance. In many cases a visual and audible alarm may be provided to warn of off-limit conditions on board ship and, associated with this, the important variables will be recorded on demand. The automatic control system can be more sophisticated by incorporating digital-processing equipment, that is, a computer. This computer is usually fed with signals from all sensors. It scans the values of the sensors and generates alarm signals for off-limit conditions, acting as a super-supervisor. Sometimes, it can even make necessary and take the necessary action to optimize performance without human intervention.

the presence of a feed back

[单选题]物体热传导主要是依靠物体中的______传递热的。

物体内分子、微粒的相互碰撞

[单选题]鲨鱼攻击落水者，一年中往往发生在：

夏季

[单选题]某轮真航向为030°，已知罗经差为2°W，求该轮所驶罗航向：()

032°