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问题 单项选择题

对Ⅰ型呼吸衰竭患者若给予高浓度氧疗仍无效，其原因很可能为

A．严重肺通气功能障碍

B．严重肺动静脉样分流

C．通气/血流比例增大

D．肺弥散功能障碍

E．耗氧量增加

答案

参考答案：A

不定项选择

下列关于上述材料的说法正确的是

A．这是一份重要而规范的行政公文

B．这份公文没有明确的主送机关名称

C．这份公文没有固定的结束用语

D．这份公文通过媒体公开发布，不属于正式公文
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单项选择题

The (71) 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 (72) . In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a (73) , which consists of (74) indicated using a circle, and (75) shown as a rectangle. These two components can be linked by means of a directed arc.

（75）处填（）。

A．transmitters

B．transitive

C．transitions

D．transformations
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