[问答题] 单品种全年累计2万元以下的烟用物资采用什么方式进行采购？

Lubricating oil systems are fitted with a wide variety of strainers some of which can be cleaned in site while others have replaceable cartridgesThe bold and italic word “which” means （）. ["lubricating oil","lubricating oil systems","strainers","cartridge"] 右图是某生物组织在黑暗及不同O2浓度下，呼吸产生的C02量与组织消耗O2量的关系。下列有关叙述中正确的是（） ["该生物组织可能是动物组织","该生物组织呼吸作用的原料是糖类","O_{2<\/sub>浓度a、b、c时，无氧呼吸强度a>b>c","当XY：YZ=2：1时，该组织无氧呼吸的强度是有氧呼吸的6倍"] 维修低压电器设备及其所带动的机械部分时，应采取（）安全措施。 ["停车后切断电源，拉开闸刀开关","取下熔断器","在闸刀开关操作把手上挂“禁止合闸，有人工作”标示牌","设专人监护","验明无电后，方可工作"] 下列不属于服务模块库的是（） ["设计模块","监理模块","施工模块","塔桅模块"] In many installations basket strainers consist of a cylindrical container in which a perforated metal or wire basket is suspendedThe bold and italic word “which” means （）. ["installations","basket strainers","a cylindrical container","a metal or wire basket"] 单品种全年累计2万元以下的烟用物资采用什么方式进行采购？}