《维规》规定便携电台的音频输出功率≥（）W.

A、0.5

B、1

C、1.5

请叙述蓄电池组容量测试必须遵循的基本原则。

AutoCAD中，对象的阵列有哪几种方式（）。

A、环形

B、圆形

C、线形

D、矩形

A technician notices that there is a second partition on the primary hard drive. This partitionis notassigned a drive letter and is not accessible from Windows. Which of the following is the MOST likely explanation for this extra partition?（）

A、Space reserved by the drive manufacturer for firmware.

B、Space set aside by Windows for use by the virtual memory swap file.

C、A potentially dangerous virus has been downloaded onto the system.

D、A recovery partition put there by the manufacturer.

Windows XP mode on a Windows 7 Professional machine fails to load. Which of the following isMOST likely the cause?（）

A、The machine does not have enough processor cores to allow for this feature.

B、Virtualization support is not enabled in the BIOS.

C、A license of Windows XP must be purchased in order to use Windows XP Mode.

D、The machine does not have enough RAM to allow for this feature.

View the Exhibit and examine the attributes of an undo tablespace. In an OLTP system, the user SCOTT hasstarted a query on a large table in the peak transactional hour that performs bulk inserts. The query runs formore than 15 minutes and then SCOTT receives the following error:ORA-01555: snapshot too old What could be the reason for this error（）

A、 The query is unable to get a read-consistent image.

B、 There is not enough space in Flash Recovery Area.

C、 There is not enough free space in the flashback archive.

D、 The query is unable to place data blocks in undo tablespace