社会学研究的重点首先是（）。 ["社会文化","社会制度","社会群体","现实社会"]
While connected to the database，a user on a PC receives a fatal error and the machine reboots. Which background process cleans up the failed connection？（） ["ARCn","CKPT","DBWn","LGWR","PMON","SMON"]
游戏复演说的提出者是（） ["拜敦代克","艾里康宁","霍尔","斯宾塞"]
实现连接远端站点的主要方法有（）和（）。
建筑按主要承重结构的材料分类，没有（） ["砖混结构","钢筋混凝土结构","框架结构","钢结构"]
什么是Web服务？它的优点是什么？
