A customer needs a remote data copy， data migration， and off-site backup solution. The solution cannot impact application performance. The sites are over continental distances. Which characteristic of DS8700 Global Mirror makes it a good fit for this customer（）
A、it provides synchronous mirroring on both sides
B、it can be implemented withoutFlashCopy volumes at the target site
C、with Global Mirror， the Metro Mirror functions can be used over continental distances
D、it has almost no impact on application performance because of its extremely short and adjustable coordination time
LTE中的链路预算是以（）为覆盖目标来进行的。
Rootvg has just been mirrored to a second disk. Which of the following actions should be performed to boot the system off of either disk?（）
A、Extendvg to include both disks in the rootvg
B、Copy the hd5 logical volume to hdisk1
C、Run the bosboot and bootlist commands
D、Reset the dump device to /dev/sysdumpnull
画正等轴测剖视图，可先画物体完整的（）。
A、正等轴测图
B、三视图
C、主视图
D、平面图
在C++中，打开一个文件时与该文件建立联系的是（ ）。
A、流对象
B、模板
C、函数
D、类
下面哪些是实施SOA的优势？（）
A、可降低IT的灵活性
B、可实现业务上的灵活性
C、可提高集成的投资回报
D、可更新已有的IT设施
E、提高集成的ROI