While attempting to expand a file system, an administrator receives an error message indicating that the filesystem is not recognized. Running the 'lsfs' command fails to display any output, but the 'df' command is working and displays normal filesystems. What is the likely cause of the problem?（） ["The \/etc\/filesystems file is missing.","The \/dev\/hd8 logical volume is corrupt.","The hosting volume group is not varied on.","The \/var and \/tmp filesystems may be full."]
A customer using an IBM System Storage DS8700 is facing performance problems. After the analysis by the technical specialist， the diagnosis indicates that the cache hits may be improved by a cache upgrade. How can the system be monitored in order to check the benefits of the cache upgrade（） ["using the "vmstat" command on the AIX servers connected via SAN to the DS8700 system","look at the IOPS using the DS8700","reading the performance reports via Tivoli Storage Productivity Center for Disk","generating reports using theTotalStorage Expert"]
在NPT5型空压机中，（）属于运动机构。 ["曲轴","气缸","气缸盖","曲轴箱"]
角色期待的内容往往是一成不变的。
液化石油气燃烧时，一般每立方米气体的低发热量为10×104KJ/m3，约为焦炉煤气的（）倍。 ["2","3","4","5"]
简述变桨系统采用超级电容的优点.
