采购是—个组织从外部资源获取所需要的全部商品和服务的过程，其目的是用最小可能的采购价格获得所需的商品和服务。
Which parameter， when enabled on a standalone access point， gives the highest priority to a voice packeteven when QoS is not enabled？（） ["QoS Element for Wireless Phones","IGMP Snooping","WMM","AVVID Priority Mapping"]
鼎信诺取数方式有（）种。 ["1种","2种","3种","4种"]
采煤工作面端头工岗位职责包括（）。 ["严格执行“敲帮问顶”制度，检查支架，顶.帮情况，发现安全隐患，及时处理","积极配合一通三防部门加强隅角处的瓦斯治理.防火和防尘管理等","上.下端头环境卫生保持整洁","严格执行现场交接班制度，认真执行手指口述安全确认制度"]
You connect your computer to a multimedia projector. When you play a video, you cannot hear the audio. You n eed to ensure that the projector provides audio and video playback. What should you do?（） ["A","B","C","D","E"]
尾索动物
