国际顶级域名有：（）表示商业公司；（）表示教育机构；（）表示政府部门；（）表示网络组织，有时商用；（）表示协会团体；（）表示军事机构。我国的国家顶级域名为（）。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

.rec .autos .driving中的顶级域名为（）。

美国哈佛大学的域名地址的顶级域名为“GOV”。

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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

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。