简述劳动合同档案管理的注意事项。

按房地产经纪人的活动形式划分，房地产经纪人可以分为( )。

A．咨询房地产经纪人

B．居间房地产经纪人

C．代理房地产经纪人

D．行纪房地产经纪人

E．评估房地产经纪人

下列说法中不正确的是

A．钢铁在潮湿的空气中比在干燥空气中更容易生锈

B．粗铜精炼时，电解液中的c(Cu^2＋)保持不变

C．配制溶液时俯视容量瓶刻度线定容会使溶液浓度偏高

D．向含有少量Fe³⁺的MgCl₂酸性溶液中加入MgCO₃，可将Fe³⁺转化成Fe(OH)₃除去

分子与分母相等（0除外）的分数等于1．______．（判断对错）

（）作为现场施工成本控制的目标。

A.现场施工成本偏差

B.现场施工成本降低额

C.现场施工计划成本

D.现场施工成本降低率

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