正确答案: C

transport

题目：The TCP protocolis a （）layer protocol.

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

costaggregation

解析：可以注意到该题的关键词为"mathematical model"和"predict total project cost"，再划分语句结构"The（）technique(主语)involves(谓语)using project characteristics in a mathematical model to predict total project cost"，易理解语句含义为"什么技术使用数学模型预测项目的总成本"。观察四个选项，ABD也可能应用数学模型，也可能只是简单的数字规定，但选项C 一定会应用数学模型，所以应该选择parametric estimating。

[单选题]Organizations perform work to achieve a set of objectives. Generally, work can be categorized as either projects or operations, although the two sometimes are（）

overlap

解析：该题的关键词为"categorizedprojects or operations"，其语句结构为"Generally,work（主语）can be categorized（谓语）as either projects or operations, althoughthe two（主语）sometimes are（）（谓语）"，含义为"通常，工作可以分类为项目型和运作型工作，尽管两者有时(?)"，因两者既有相同之处，也有不同的地方，所以选择C。选项D对应的单词"dissever"疑为拼写有误。

[单选题]Quality planning tools are often used to help plan effective quality management activities . （）is one of such tools, which involves company actual or planned project practices to those or other projects to generate ideas for improvement and to provide a basis by which to measure performance.

Benchmarking

[单选题]Fair and(1) competition in government procurement around the world is good business and good public policy. Competitive pricing, product(2)and performanceimprovements result from competitive practices and help ensure that government authoritiesget the best (3)for the public they serve.