投影技法是一种（）的调查方法。 ["无结构、非直接","有结构、直接","无结构、直接","有结构、非直接"]
Which of the following options best justifies why a DNS server should be run in a large network system？（） ["To use ftp and telnet","To perform NFS mounts","To make \/etc\/hosts files unnecessary","To reduce network traffic and save bandwidth"]
下面哪一种爆炸属于物理爆炸。（） ["粉尘与空气混合物爆炸；","液化石油气与空气混合物爆炸","炸药爆炸；","液化石油气瓶超压爆炸"]
Which command will allow the creation of a10-character login user name?（） ["chlogin -a log_name=10","chdev -l sys0 -a max_logname=10","chusr extended_logname=true [userid]","chuser login_name=10 extended_logname=true [userid]"]
根据动机归因理论，属于可控的内在因素是（） ["能力高低","努力程度","身心状态","运气"]
城市的概念有哪些标准。
