农产品需求受多种因素的影响，其中主要因素是（）。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

可以在（）阶段采用Make-or-buy决策分析。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, 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（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

用来测定受多种因素影响的加油站某种经济现象总变动中，各个因素的影响方向和影响程度的分析方法是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。