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.

在老年人体内,药物的半衰期会

何谓药物的半衰期？半衰期有何药理学意义？

催化剂停留时间越长，烧焦时间越长。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

一项创新开始试用时间越早，则试用时间越长；反之试用时间越短。为什么？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

某药半衰期为10小时，一次给药后，药物在体内基本消除时间为________。