OR指令的作用是: 。( )

铵梯炸药是我国目前广泛使用的工业炸药，它由硝酸铵、梯恩梯和木粉三种成分构成。其中梯恩梯在该类炸药中所起的作用是（）。

木粉混合在硝铵类的粉状炸药中除作可燃剂外，还能起（）的作用。

铵梯炸药是由硝酸铵（80%以上）、梯恩梯（3—20%左右）和少量木粉成分混制而成，其中主要成分硝酸铵是（），梯恩梯是（），又是加强剂；木粉是（），又是可燃剂。

矿山常用的硝铵类炸药有铵梯炸药、铵油炸药、铵松蜡炸药和煤矿炸药。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。