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 （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

货币是一种债务凭证，是货币发行人即中央银行对社会公众的负债。（）

中央银行参与货币市场的目的是（）

中央银行参与货币市场的目的是（ ）

中央银行是货币市场的主要参与者，中央银行参与货币市场的主要目的是（）

中央银行参与货币市场的主要目的是( )

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。