●在数据库管理系统的层次结构中，由高级到低级的层次排列顺序为 (23) 。

●在数据库管理系统的层次结构中，由高级到低级的层次排列顺序为 (23) 。

在数据库管理系统的层次结构中，由高级到低级的层次排列顺序为（ ）。

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.

高级管理人员负责明确企业使命，高级管理人员包括（　）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

对管理信息系统的结构描述一般可以从横向(基于职能)和纵向(基于管理层次)两个方面来描述。“人员结构安排”属于哪个职能、哪个管理层次的管理信息系统的任务?

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。