对于高职高专毕业生对就业岗位、薪资期望水平进行调查，适宜采用（）方式。 ["市场普查","重点市场调查","典型市场调查","随机市场调查"]
After running the vmstat command， which of the following would most likely cause the value in the blocked column to be unusually high？（） [" Kernel thread"," Too many users"," Memory shortage"," Network contentio"]
During system boot， the system hangs at LED 0C31. What is the first step the system administrator should take to correct the problem？（） ["Check system console connections","Check system network connections","Boot in service mode and change the bootlist","Boot from the AIX installation media and mount rootvg filesystem"]
1200H型开孔机液压动力设备部件不包括（） ["油箱","发动机","油水分离器","液压泵"]
Which of the following techniques is used to extract the /usr/tmp directory from a mksysb backup?（） ["Use the tar command on the fifth image.","Use the restore command on the fourth image.","Use tctl -f \/dev\/rmt0.1 fsf 3 followed by the tar command on the fourth image.","Reboot using the mksysb tape and then use the dd command to extract the file."]
某综合利用水利枢纽工程位于我国西北某省，枯水期流量很少；坝型为土石坝，黏土心墙防渗；坝址处河道较窄，岸坡平缓。工程中的某分部工程包括坝基开挖、坝基防渗及坝体填筑，该分部工程验收结论为“本分部工程划分为80个单位工程，其中合格30个，优良50个，主要单位工程、重要隐蔽工程及关键部位的单元工程质量优良，且未发生过质量事故；中间产品质量全部合格，其中混凝土拌和物质量达到优良，故本分部工程优良。”
根据水利水电工程有关质量评定规程，质量评定时项目划分为哪几级？
