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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

管理既是一门科学，又是一门艺术，是科学与艺术的有机结合体。

管理既是一门科学，又是一门艺术.（）

为什么说管理既是一门科学又是一种艺术？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

你如何理解管理既是—门科学，又是一门艺术？

怎样理解管理既是一门科学，又是一门艺术的含义？