（）, 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。

简述单位产品缺陷数服从泊松分布的假设条件。

中国共产党安徽省第十次代表大会报告上提到，安徽省义务教育阶段学校标准化和信息化覆盖率大幅提高，（）毛入学率超过全国平均水平。

假设总体服从泊松分布，从此总体中抽取容量为100的样本，则样本均值的抽样分布（　　）。

一铸件上的缺陷数X服从泊松分布，每铸件上的平均缺陷数是0.5，则：一铸件上仅有一个缺陷的概率为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。