简述乳化沥青、改性沥青、改性乳化沥青的概念。

改性乳化沥青分（）型改性乳化沥青及（）用乳化沥青。

为使沥青面层与非沥青材料基层结合良好，在基层上喷洒液体石油沥青、乳化沥青、煤沥青而形成的薄层为（）。

石油沥青的针入度值越大，沥青材料的粘滞性（）

沥青油膏是以石油沥青为主要材料，（），以提高其和易性及结膜性。

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。