桑代克在迁移研究中的最大贡献是（） 发现了迁移的心理机制。 最早进行迁移实验研究。 否定了普遍迁移的说法。 用实验事实否定了形式训练说。
A system administrator has backed up the datavg volume group using the savevg command. There are several raw logical volumes and some unmounted jfs filesystems in datavg. Which of the following statements is true about this backup?（） The volume group and all logical volumes will be recreated. All raw and jfs filesystms will be backed up and restored.。 This backup will be bootable and the volume group and all jfs logical volumes will be recreated.。 This backup will not be bootable and the restorevg command is used to restore only the mounted and non-raw logical volumes. It will not recreate any logical volumes that are raw or unmounted.。 The volume group and all logical volumes information is archived and will be recreated. The raw and unmounted filesystems will not be backed up and therefore not restored.。
简述归因理论的教育意义？
A System p administrator has an application that has the data in volume group appvg. Which of the following commands will back up the contents of appvg to the tape in /dev/rmt0 and check for any read errors （） savevg -mf /dev/rmt0 appvg。 savevg -cvf /dev/rmt0 appvg。 savevg -vf /dev/rmt0 appvg。 savevg -f /dev/rmt0 -V appvg。
变量测量尺度的类型包括（）。 间隔尺度.长短尺度.名义尺度。 顺序尺度.名称尺度.长短尺度。 名称尺度.间隔尺度.长短尺度。 间隔尺度.顺序尺度.名义尺度。
南京雨花茶属于（）外形名茶。
