（）, 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.

肺动脉栓塞的血栓栓子最多来源于：（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

柏油色黑便提示上消化道出血的量（）

出现柏油样黑便，提示上消化道出血至少已达

信息系统开发的经验表明，系统出现的错误最多来源于( )。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

胆囊动脉最多来源于（）

冠状动脉瘘最多来源于（）