用趋势剔除法测定季节变动的目的是计算没有长期趋势影响的季节指数。

在用移动平均趋势剔除法测定季节变动时，剔除长期趋势的方法是按月资料移动平均。

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。

月平均法计算季节指数时，近期的季节指数在整个指数中的影响小，远期的季节指数在整个指数中的影响大

在时间数列的季节变动分析中常常要用季节指数法进行分析。表6—1中是某产品2009年～2012年期间的各季销售数据。[img:LzIwMTctMDUvd2FuZ3l1LzIwMTcwNTExMDkxODM5OTk3MTIuanBn]季节比率的分析方法，首先计算()。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。