When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.

Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）

The operation between two fuel injections is called a working cycle, which consists of a fixed sequence of eventsWhat does "which" mean in this sentence?（）

To safeguard the operator and other personnel working on or near a hoisting operation which of the following precautions should be observed?（）

The （） or balance tank collects the re-circulated fuel oil.

The （） or balance tank collects the re-circulated fuel oil.

Organizations perform. work to achieve a set of objectives. Generally, work can be categorized as either projects or operations, although the two sometimes are(67).

Organizations perform work to achieve a set of objectives. Generally, work can be categorized as either projects or operations, although the two sometimes are （ ） .

If you observe any situation which presents a safety or pollution hazard during fuel transfer operations, which of the following actions should be taken FIRST?（）

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.

The ball _____ two or three times before rolling down the slope.