Examine the following ALTER command: SQL> ALTER DISKGROUP dgroup1 UNDROP DISKS; What is the purpose of the command?（） It cancels all pending disk drops within the disk group。 It restores disks that are being dropped as the result of a DROP DISKGROUP operation。 It mounts disks in the disk group for which the drop-disk operation has already been completed。 It restores all the dropped disks in the disk group for which the drop-disk operation has already been completed。 It adds previously dropped disks back into the disk grou。
调动教职工工作积极性的关键是（）。 加强对教职工的纪律管理。 实行物质奖励政策。 为教职工创造专业发展的机会。 加强思想政治教育，提高教职工的觉悟。
Which two statements are true about the primary key constraint in a table？ （） It is not possible to disable the primary key constraint.。 It is possible to have more than one primary key constraint in a single table.。 The primary key constraint can be referred by only one foreign key constraint.。 The primary key constraint can be imposed by combining more than one column.。 The non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.。
可以导致胆固醇增高的药物是（） 氟伐他汀。 氯氮平。 非诺贝特。 二甲双胍。 吗啡。
下面哪一种不会产生静电危害。（） 高压气体从小口喷出；。 液化石油气在管道中高速流动；。 穿化纤衣服人员的走动；。 内侧面涂上炭黑的传动皮带的传动。
Which of the following uses compression/decompression to increase the memory available for client workloads?（）
