闭环控制系统中加装（）。

输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

网络营销的企业竞争是一种以（）为焦点的竞争形态.P电子商务师考试模拟试题

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

网络营销的企业竞争是一种以（）为焦点的竞争形态.P电子商务师考试模拟试题

（ ）负责拟定二级建造师职业资格考试大纲，（ ）负责审定考试大纲。

对在用点燃式发动机汽车排气污染物实施双怠速法监测时，对于使用闭环控制电子燃油喷射系统和三元催化转化器技术的汽车还要进行（）的测量。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

闭环控制系统的反馈装置装在（    ）。