（）, 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。

实生树和营养繁殖树的生命周期之间有什么不同？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

实生育苗概念，实生苗的特点？

有些地方由于苹果的需求量大，苹果苗的价格不断上升，众多果农不惜投入巨资大种特种果苗。几年后，苹果供应量大增，导致果苗价格急转直下，这给盲目投资果苗种植的果农造成了严重损失。这说明

有些地方由于苹果的需求量大，苹果苗的价格不断上升，众多果农不惜投入巨资大种特种果苗。几年后，苹果供应量大增，导致果苗价格急转直下，这给盲目投资果苗种植的果农造成了严重损失。这说明（）。