可增强漆膜的厚度和强度，提高漆膜的耐磨和耐久性的体质颜料有（）。

双向晶闸管的结构与普通晶闸管不一样,它是由五层半导体材料构成的。上述描述( )

（）是由胶凝材料、细集料和水配制而成的建筑工程材料。

生产力是由作为人的因素的生产资料和物的因素的劳动力构成的。

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。

组合砖砌体是由砖砌体和钢筋混凝土面层或钢筋砂浆面层构成的整体材料。