下面列出的关于“视图”的条目中，( )是不正确的。A．视图是外模式 B．视图是虚表

正常人潮气量平均约为（）

A.900ml

B.400ml

C.200ml

D.300ml

E.500ml

从社会再生产或从整个国民经济出发，经济效益的内涵应该是()。

A.使用价值和价值的统一

B.生产与消费的统一

C.微观经济效益与宏观经济效益的统一

D.经济效益与社会效益、环境效益的统一

斜坡式码头一般用于水位变幅较小的河港。( )

The（）is a general description of the architecture of a workflow management system used by the WFMC, in which the main components and the associated interfaces are summarized. The workflow enactment service is the heart of a workflow system which consists of several（）. In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a（）, which consists of（）indicated using a circle, and（）shown as a rectangle. These two components can be linked by means of a directed arc.

The workflow enactment service is the heart of a workflow system which consists of several（）

A．workflow engines

B．processes

C．workflow threads

D．tasks

根据我国企业法律风险相关理论，法律风险防范机制中最基础的环节是（）。

A.法律风险识别

B.法律风险分析

C.法律风险控制

D.法律风险评估