计算机检索系统由计算机硬件、通讯设施、（）和软件四部分组成。 

一个完整的计算机系统由硬件系统和软件系统两大部分组成。

一个完整的计算机系统通常是由硬件系统和软件系统两大部分组成的。

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。

计算机硬件系统由哪几部分组成？系统软件包括哪些？

计算机系统由计算机软件和计算机硬件两大部分组成，其中计算机软件又可分为（） 和应用软件。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。