（）, 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.

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。

Demand curve（or demand schedule） 需求曲线（或需求表）

英国比较教育学家汉斯在英王学院任职期间撰写的代表作为（）。

教师根据教育实验中遇到的新情况、新问题特别是突出事件迅速做出判断，果断加以处理并取得良好效果的教育行为称为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

由曾经经历过某事件的人撰写的资料属于（）。