在我国研究比较成熟的人文地理问题有经济地理问题、人口地理问题、（）地理问题和（）地理问题。

结构法教材指以（）为纲的教材。

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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

我国第一部野外考察记录和优秀的地理著作是（）

观察秦朝疆域图（见右图）结合所学地理知识，请你判断秦朝疆域最西到达今天我国哪个省或自治区？（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。