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。

在颐和园昆明湖东岸上，除了文昌阁和文昌院外，还有哪些主要景观？

颐和园知春亭的跨度是（）？

颐和园的知春亭有（）米的跨度。

颐和园知春亭有（）座桥。

知春亭的面积是（）平方米

颐和园知春亭面积（）平米。

北京颐和园东门牌楼，正反两面分别写着什么，概括了园林精髓？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。