被后人称为“史家之绝唱，无韵之《离骚》”的千古巨著是（）。 ["《诗经》","《春秋左氏传》","《史记》","《庄子》"]
青年学生，失恋半年来，学习成绩明显下降，孤僻少语，生活懒散，对老师、家长批评持无所谓态度，还经常照镜子，并且自言自语，说镜子里自己的脸变形了。该患者没有的症状是（） ["情感平淡","意志减退","人格障碍","感知综合障碍","性格改变"]
试述注意的种类？
分类的典型应用有（） ["目标化市场营销","质量控制","风险分析","客户维持度分析"]
If node 2 is accepting line timing from node 1, node 2 will send （）to node 1 as its SSM message. [" ESF"," PRS"," DUS"," SMC"," B8ZS"]
气体润滑
