趋势分析属于（），其目标是从过去和现在已知情况出发，利用一定技术方法，去分析设备的（）、异常和故障3种状态，推测故障的发展过程，有利维修决策和过程控制。
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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?（）
A. The volume group and all logical volumes will be recreated. All raw and jfs filesystms will be backed up and restored.
B. This backup will be bootable and the volume group and all jfs logical volumes will be recreated.
C. 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.
D. 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.
改革开放30多年来，我国的对外开放水平不断提高，但发展对外经济关系，始终把（）作为自己发展的根本基点。
A. 独立自主、自力更生
B. “引进来”与“走出去”相结合
C. 提高对外开放水平
D. 坚持独立自主与参与经济全球化相结合
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