恩格尔系数是指消费者的食品消费支出占（ ）的比例。

翻译：With Average or With Particular Average（WA or WPA）（）

根据世界银行衡量各国消费水平的标准，食品支出占消费支出的比重为20%—40%时的消费水平是（ ）

恩格尔系数越大，食品支出所占比重越大，表明居民生活富裕，生活质量高。（）

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。

恩格尔系数越大，食品支出所占比重越大，表明居民生活富裕，生活质量高。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。