通过ADSL访问Internet，在用户端通过 (18) 和ADSL MoDem连接PC机，在ISP端通过 (19) 设备连接因特网。（18）

计算机利用拨号方式上网时，除电话线外，计算机上还必须配备（）

用户利用电话线上网需要在计算机上加装网卡。

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。

ADSL用户上网都采用拨号方式。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

布尔逻辑具体检索时，是通过三个布尔运算符来实现其功能的：AND、OR、（）。