All three systems have the ports （） to swirl the incoming air and direct it in the appropriate path.

Fire protection and manning regulations for towing vessels state that the Master or person in charge must ensure that all crew members who have not participated in the drills or received the safety orientation（）.

Masters are（）solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.

A seaman may have all or part of his wages deposited by allotment to a bank or savings institution. Which of the following is NOT a requirement for this type of allotment? （）

The court may reduce or deny remuneration if it appears that the salvors have by their fault （）or have been guilty of theft，receiving stolen goods，or other acts of fraud.

Although goods have been lost or damaged whilst in the custody of the Shipowner，（）not necessarily responsible，for his liability in respect of them may have been excluded by the rules of common law or by the express terms of the contract or by statute.

Turbocharging system may be designed to operate on either the （） or the constant pressure exhaust system.

The goal, which they are unlikely to live to see , is tocure, prevent or manage all diseasesin the next 80or so years.

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.

After the cameraman had taken three or four photographs of the soldier ants, he found they had ______ all over his feet.

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

●A (68) is a feature of the system or adescription of something the system is capable of doing in order to fulfill the system's purpose.