“金三角”位于老挝、泰国、缅甸与我国接壤，盛产罂粟，是（）的主要毒源地。 ["海洛因","咖啡因","冰毒","可卡因"]
操作间可以存放的材料为（） ["当班的用料","废弃用料","半成品","成品"]
系统抽样
配额抽样
You need to ensure that there is adequate bandwidth available to meet the service-level agreement requirements. Which action or actions should you perform?（） ["Upgrade all WAN lines in six months. ","Upgrade all WAN lines prior to implementing NewApp. ","Analyze the cause of a peak in network usage in February.","Analyze network usage characteristics for NewApp. ","Based on these results, create an upgrade plan for the WAN lines.&e"]
整群抽样
