（）, 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 （）.

容易受个人主观因素影响而使信息失真是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

腹部脏器中最容易受创伤的器官是（ ）

环境致畸因子主要包括生物性致畸因子、物理性致畸因子、药物性致畸因子、化学性致畸因子以及其他致畸因子。

假如某因素与某病关系的病例对照研究结果的OR值为0.3（P＜0.01），最可能的解释是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。