实时操作系统具有三个特点：（）、（）和（）、（）和（）是实时系统追求的主要目标。

非实时操作系统——多用于（）领域，一般以功能繁多、操作容易、界面友好为追求。

分时操作系统追求的目标是( )。

实时操作系统追求的目标是（）

（　　）不是设计实时操作系统主要的追求目标。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

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.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。