用经纬仪测水平角，由于对中误差，目标偏斜致使水平角产生误差．这种误差（）

经纬仪对中误差、照准误差、估读误差属于系统误差。

用光学经纬仪进行水平角测量中的主要人为误差有：对中误差、整平误差、照准误差、（）。

由于经纬仪的对中误差产生测角误差，观测长边时比观测短边产生的这种影响要大。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

面料经纬向判定，对于有布边的面料，与边平行的方向为（）（经向or纬向）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。