关税应纳税额的计算方法有从价税计算方法、从量税计算方法、复合税计算方法和滑准税计算 方法( )。

已知X=21，Y=15，Z=22，计算表达式（（X>Y）or（Y>Z））and（（X<><>

处理直线度误差读数的方法有计算法，（）和两端点连线法。

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。

某研究者进行了一项关于某厂机动车辆事故的调查研究，共调查了该厂发生事故的工人171例，未发生伤害事故的工人352例。计算了各种危险因素的OR值。发现路口的照度可影响事故的发生。该项研究属于

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。