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.

水平投影长度总是等于水平位移。

水平线的水平投影反映真实长度。

水平投影长度与水平位移有何区别？视平移与水平位移有何区别？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

水平投影长度与水平位移有何区别？视平移与水平位移有何区别?

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下列能够反映商品房真实价格水平的是（）。