揭开中国改革开放序幕是党的哪次会议？而在20世纪80年代中后期，苏联也进行了哪一场改革？

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。

北魏孝文帝改革后，实行三载考绩、三考（）的制度，并与（）相结合。

北魏孝文帝改姓“拓拔”为（）。

北魏孝文帝汉化政策中把拓拔姓氏改为（）。

北魏孝文帝是北魏的（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。