经营者提供的商品或者服务不符合质量要求的.消费者可以依照国家规定、当事人约定退货，或者要求经营者绿行更换、修理等义务，但消费者应当承担运输等必要费用。

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.

法律虽有规定，但经营者与消费者另有约定的，经营者按照约定履行义务。

经营者提供()，应当按照国家有关规定或者商业惯例向消费者出具购货凭证或者服务单据，消费者索要购货凭证或者服务单据的，经营者必须出具。

经营者提供（），应当按照国家有关规定或者商业惯例向消费者出具购货凭证或者服务单据。消费者索要购货凭证或者服务单据的，经营者必须出具。

经营者提供商品或者服务.应当按照国家有关规定或者商业惯例向消费者出共发票等购货凭证或者服务单据。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。