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（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

The（）may examine or re-examine the goods or take samples from them straightaway in the absence of the consignee or the consignor whenever it considers this necessary.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

Banks have no liability for any delay or loss caused by postal or telex failure.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

有人认为，鸦片战争“并不是为了维持鸦片贸易而进行的斗争，它不过是一个持续了20年，并且要决定东方和西方之间应有的商务关系的斗争开端。”对这段话的认识，不正确的是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

3月12日《北京青年报》一则关于“大学生学习不刻苦涉嫌违法”的消息引起不少热议，起因是有人在《中华人民共和国高等教育法》中看到了“应当刻苦学习”的字样，不少网友在抱着娱乐心态转发的同时也在询问，按照法条的规定大学生学习不刻苦真的涉嫌违法吗？对此，有律师表示，不会受到法律的惩罚。有人认为，不刻苦学习违法，实在可笑，也有人认为，大学生的学习状态的确应该管管了。对此你怎么看？