在人机系统中，解决人机系统安全问题的根本途径是（）。

瓶库与重要的公共建筑应保持不小于（）的安全距离。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

新的国家安全观本质上体现了国家安全任务的转变。

通常阅读器发送时所使用的频率被称为RFID系统的工作频率，低频系统一般指其工作频率小于（）MHZ。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

姿态也叫（），是指人的外显的可观察的动作或身体各部分呈现出的姿势态度，主要指人的举止动作和面部表情。