哪些技术可以用于用户的身份认证（）。

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。

虚拟专用网VPN的关键技术主要是隧道技术、加解密技术、密钥管理技术以及使用者与设备身份认证技术。

局域网一般都采用（）交换技术，也广泛采用（）交换技术，但用（）交换技术。

会计专业技术资格考试是会计人才评价的一种方式，主要用于对（）会计人才的评价。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。