● Project（71）is an uncertain event or condition that, if it occurs, has a positive or a negative effect on at least one project objective, such as time, cost, scope, or quality.（71）

在长期边际成本曲线与长期平均成本曲线相交之前，长期边际成本（）长期平均成本；而在相交之后，长期边际成本（）长期平均成本。

边际产品（Marginal product）

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

（ ）estimating is a technique for estimating the duration or cost of an activity ou project using historical data from a similar activity or project.

The(7)technique involves using project characteristics in a mathematical model to predict total project cost. Models can be simple or complex.

The（）technique involves using project characteristics in a mathematical model to predict total project cost. Models can be simple or complex.

什么是边际成本？边际成本定价的特点是什么？

Moving goods by rail often involves（）costs， particularly when the shipper or receiver lack direct rail access.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。