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 （）.

上述两例对我们增强创新意识有何启示？

它对我们今天有何启示？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

大自然能给我们许多启示：青松不惧风雪，是在告诉我们做人要坚毅刚强；成熟的稻穗低着头，那是在启示我们要谦虚；一群蚂蚁抬走骨头，那是在启示我们要_______。

大自然能给我们许多启示：青松不惧风雪，是在告诉我们做人要坚毅刚强；成熟的稻穗低着头，那是在启示我们要谦虚；一群蚂蚁抬走骨头。那是在启示我们要__________。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述公共财政理论对我国公共财政改革的启示。