1997年，党中央下发《中共中央关于加强新形势下保密工作的决定》明确提出，要全面提高保密干部的政治思想和业务素质，努力做好（）。

华东理工大学网络教育实行的是弹性学制，高起专和专升本两种层次的学习年限均是（）

下面哪一位提出“学诗是人的思想道德修养的开始”：（）

美发师不仅要提高思想道德修养，还应突出（）

新闻记者要加强（）、知识修养、思维修养等三大修养。

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。