查阅文献的基本步骤包括（） [" 明确检索目的"," 选择文献检索工具"," 确定检索途径和检索词"," 根据线索获取原始文献"," 以上顺序是正确的"]
超滤工作原理？
Which two statements correctly identify considerations to take into account when deciding onCampus QoS Design elements？ （） [" Voice needs to be assigned to the hardware priority queue"," Voice needs to be assigned to the software priority queue"," Call signaling must have guaranteed bandwidth service"," Strict-priority queuing should be limited to 50 percent of the capacity of the link"," At least 33 percent or the link bandwidth should be reserved tor default best effort cla"]
一块（0～6）MPa、1.5级的一般压力表，在45℃环境中使用时的示值误差是（） ["0.0138MPa","0.138MPa","0.09MPa","0.9MPa"]
在中国现代美学家中，持美是“客观性和社会性的统一”观点的是（）。 ["宗白华","蔡仪","李泽厚","王国维"]
薄皮鲕
