由于抽取样本的随机性造成的误差是（）。 无回答误差。 测量误差。 抽样框误差。 抽样误差。
All of the following settings will result in a getty process on the configured port EXCEPT： （） Enable。 Disable。 Share。 Delay。
Which sar option generates real-time disk I/O statistics?（） sar -q 。 sar -P 。 sar -d 。 sar -D&e。
《铁路技术管理规程》规定，制动初速在120~140km／h的列车紧急制动距离须不大于（）。 1100m。 1200m。 1300。 1400m。
A System p administrator noticed several error messages on the screen while the system was booting up； but was not able to write them down. Where should the system administrator look for the console log， assuming it is in the default location（） /var/log/conslog。 /var/log/console.log。 /var/adm/ras/conslog。 /var/ras/console.log。
A system administrator has increased the size the logical volume lv00. The administrator now wants to enlarge the filesystem /fs00 that is mounted on lv00 to the same size that lv00 currently is. Which of the following commands will show the administrator the number of blocks to use when increasing the size of the filesystem /fs00？（）
