消费者向经营者索要购货凭证或服务单据，经营者（）

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.

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。

消费者如果索要购货凭证或服务单据，经营者可以凭证或单据刚好用完为由进行婉拒。

经营者提供商品或服务，消费者索要购货凭证和服务单据的，经营者（）。

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。