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【单选题】
You plan to deploy a distributed database application that runs on multiple Windows Server 2008 R2 servers. You need to design a storage strategy that meets the following requirements： èAllocates storage to servers as required èUses the existing network infrastructure èUses standard Windows management tools èEnsures that data is available if a single disk fails What should you include in your design？（）A.
An iSCSI disk storage subsystem that supports Microsoft Multipath I/O. Configure the storage subsystem as a RAID？0 array.
B.
An iSCSI disk storage subsystem that supports Virtual Disk Service （VDS）. Configure the storageubsystem as a RAID？5 array.
C.
A Fibre Channel （FC） disk storage subsystem that supports Microsoft Multipath I/O. Configure the storage subsystem as a RAID？0 array.
D.
A Fibre Channel（FC）disk storage subsystem that supports the Virtual Disk Service（VDS）.Configure the storage subsystem as a RAID？5 array.
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【单选题】小儿腹泻时低钾血症的原因不包括（）
A.
呕吐和腹泻丢失钾
B.
进食少、摄入减少
C.
肾脏保钾功能差
D.
补液后血钾被稀释及合成糖原消耗
E.
酸中毒纠正后钾离子由细胞内进入细胞外
【单选题】Python导入模块错误会出现什么异常错误?
A.
Exception
B.
StandardError
C.
ImportError
D.
ArithmeticError
【多选题】以下关于三维空间中点和向量的描述,正确的有
A.
点是空间中的一个固定位置
B.
向量代表两个点之间的变换关系
C.
点、向量可以混用，本质上没有区别
D.
点、向量都可以用三维矢量