双绞线做法有两种国际标准：EIA/TIA568A和EIA/TIA568B，而双绞线的连接方法也主要有两种：直通线缆和交叉线缆。

语文考试题包括（）试题和（）试题两种。

国民经济效益费用流量表有两种：一是项目国民经济效益费用流量表；二是（）国民经济效益费用流量表。

域名注册有两种做法（）。

根据经济形势的不同，政府的价格政策有两种：一是（），二是（）。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

分析评价设备经济合理性的方法主要有两种，即（）分析法。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。