首次提出专利定义的保护期限的多边国际协议是（）

我国专利法的保护对象是参照下列（）国际公约而制定的。

专利的种类有三种：即发明专利、外观设计专利及实用新型专利，其中外观设计专利的保护期限为（）

专利的种类有三种：即发明专利、外观设计专利及实用新型专利，其中实用新型专利的保护期限为（）

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.

专利国际保护的基础是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。