访问控制的三要素是什么？按访问控制策略划分，可分为哪几类？按层面划分，可分为哪几类？

就误差的性质而言，误差可以分为哪几类（）

MCS51指令系统按功能可分为哪几类？具有哪几种寻址方式？

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.

配送中心按照服务范围可分为哪几类？.配送中心按照功能可分为哪几类？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

工艺水晶按其功能可分为哪几类？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。