【单选题】
How can a vSphere administrator ensure that two virtual machines never run on the same datastore in a datastore cluster, while permitting the VMs to be load-balanced?___
A. Use an Intra-VM Anti-Affinity Rule.
B. Configure a storage DRS VM override.
C. Disable storage
D. RS for the VMs.
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答案
B
解析
暂无解析
相关试题
【单选题】
What is the VMware-recommended way to move a physical adapter out of Network I/O Control’s scope?___
A. Set the teaming policy to “Route Based on Physical NIC Load.”
B. Add the vmnic to the Net.NetNiocAllowOverCommit parameter in Advanced System Settings.
C. Add the vmnic to the Net.IOControlPnicOptOut parameter in Advanced System Settings.
D. Move the vmnic to a different vmUplink port on the Distributed Switch.
【单选题】
A VM folder contains VM1 and VM2. Group A has permission to power on virtual machines, defined on the VM folder and its children. Group B has permission to power off virtual machines, defined on the VM folder and its children. If a user is a member of Groups A and B, what will be the user’s effective permission on VM1 and VM2?___
A. Power on
B. Power off.
C. Power on and Power off.
D. Reset.
【单选题】
Group 1 is granted console interaction on a VM folder. User 1 is granted no console interaction on the same VM folder. What will be the outcome if User 1 tries to access the console of a virtual machine?___
A. User 1 will not be able to access the virtual machines in the VM folder.
B. User 1 will not have access to the virtual machine console.
C. User 1 will have access to the virtual machine console.
D. User 1 will have console access only via the vSphere Web Client.
【单选题】
Which statement is true regarding the use of VMFS3 datastores with vSphere 6.5?___
A. VMFS3 datastores can be used but not created.
B. VMFS3 datastores can be neither used nor created.
C. VMFS3 datastores will be present but unmounted.
D. VMFS3 datastores can be created and used.
【单选题】
In the Exhibit, each VM has a 1GHz non-expandable reservation. If all VMs are powered on in sequence, what would be the outcome?___
A. VM4 cannot be powered on.
B. VM5 cannot be powered on.
C. VM6 cannot be powered on.
D. VM3 cannot be powered on.
【单选题】
vSphere 6.5 introduced MAClearning capabilities for VMware’s virtual switches. What three benefits will it provide? (Choose three.)___
A. Reduced memory consumption.
B. Reduced consumption of extra CPU cycles.
C. Increased network throughput.
D. Prevent packet flooding inside the vSwitch.
【单选题】
What is the default pathing policy for most active-active arrays?___
A. Fixed
B. Most Recently Used
C. Dynamic
D. isk Morroring
【单选题】
Which command will show the iSCSI sessions on a ESXi 6.5 host?___
A. esxcli storage iscsi session get
B. esxcli iscsi session get
C. esxcli storage iscsi session
D. esxcli iscsi session list
【单选题】
Which of the following is not a parameter for traffic filtering or marking?___
A. virtual port ID
B. Protocol
C. Traffic Direction
D. DSCP value
E. Traffic redirection
【单选题】
A vSphere administrator wants to enable a virtual machine with Secure Boot, but in VM setting, Secure Boot option was not found under Boot Options. What could be the cause?___
A. The virtual hardware is not compatible.
B. The virtual machine has missing drivers.
C. The virtual machine OS does not support secure boot.
D. VMware Tools is not upgraded.
【单选题】
A virtual machine is connected on a distributed port group where the average bandwidth configured in the traffic shaping policy is 100 Mbps. The VM network adapter is configured with a reservation of 200 Mbps. What is the VM’s effective bandwidth?___
A. 200 Mbps
B. 100 Mbps
C. 150 Mbps
D. 400 Mbps
【多选题】
What are two reasons why a datastore in a Storage DRS cluster cannot enter maintenance mode?(Choose two.)___
A. Storage latency is too high to allow Storage DRS initiate Storage vMotion.
B. Storage DRS is configured for a VMFS3 datastore.
C. Storage
D. RS is disabled on the virtual disk.
【多选题】
What two methods are used to configure VMware vSphere Storage I/O Control shares and limits? (Choose two.)___
A. Assign shares and limits to VM virtual disks.
B. Assign shares and limits to datastores.
C. Assign shares and limits to Storage (DRS) clusters.
D. Assign shares and limits using VM storage policies.
【多选题】
ESXi 6.5 introduces VMFS6, which supports both 512e and 512n devices. What three configurations are supported when using these devices? (Choose three.) ___
A. Hosts with both 512e and 512n devices.
B. Storage vMotion between both 512e and 512n devices.
C. Datastore Extents spanned between both 512e and 512n devices.
D. Storage DRS clusters containing only both 512e and 512n devices.
【多选题】
A vSphere Administrator observes that the Primary VM configured with Fault Tolerance is executing slowly. After further investigation, it is determined that the Secondary VM is on an overcommitted ESXi host. What two methods will correct the problem? (Choose two.)___
A. Use Storage vMotion to migrate the Secondary VM to another datastore.
B. Use vMotion to migrate the Secondary VM to a different ESXi host.
C. Configure a CPU limit on the Primary VM which will also apply to the Secondary VM.
D. Turn off and turn on FT in order to recreate the Secondary VM on a different datastore.
【多选题】
Which two features require the use of Host Profiles? (Choose two.)___
A. Host Customizations
B. shared storage
C. Auto
D. eploy
【多选题】
What three processes on the vCenter Server Appliance (VCSA) does“vmware-watchdog monitor? (Choose three.) ___
A. vmware-eam
B. vmcad
C. vmware-vpostgres
D. vpxd
E. vsan-health
【多选题】
What three processes on the vCenter Server Appliance (VCSA) does“vmware-watchdog monitor? (Choose three.) ___
A. vmware-eam
B. vmcad
C. vmware-vpostgres
D. vpxd
E. vsan-health
【多选题】
Which two statements correctly describe VM-Host affinity rules? (Choose two.) ___
A. When there is more than one VM-Host affinity rule in a vSphere DRS cluster, the rules are applied equally.
B. After creating a VM-Host affinity rule, its ability to function in relation to other rules is predetermined.
C. When there is more than one VM-Host affinity rule in a vSphere
D. RS cluster, the rules will be ranked.
【多选题】
An administrator wants to enable proactive HA by moving virtual machines automatically if a hardware alert is triggered. What are the three required settings? (Choose three.)___
A. Set vSphere DRS Automation to Partially Automated.
B. Turn on Proactive HA.
C. Set the Proactive HA Automation Level to Manual.
D. Set the Proactive HA Automation Level to Automated.
E. Turn on vSphere HA and vSphere DRS.
【多选题】
If vCenter Server 5.5 installation has one or more services deployed remotely, which three services are relocated to vCenter Server 6.5 on upgrade? (Choose three.)___
A. vCenter Inventory Services
B. vSphere Authentication Proxy
C. vSphere Web Client
D. vSphere
E. SXi Dump Collector
【多选题】
What two debugging levels can a virtual machine be configured to? (Choose two.)___
A. Verbose
B. Debugging
C. Statistics
D. Trivia
【多选题】
What are three benefits of using a few large-capacity LUNs instead of many small-capacity LUNs? (Choose three.) ___
A. Better performance because there is less contention for a single volume.
B. More flexibility for resizing virtual disks.
C. Less wasted storage space.
D. More flexibility to create virtual machines without adding new LUNs.
E. Fewer VMFS datastores to manage.
【多选题】
Which two configurable options are available in Boot Options for a virtual machine? (Choose two.)___
A. Tools Upgrades
B. Encryption
C. Firmware
D. Force BIOS setup
【多选题】
Which three VMware-recommended best practices should an administrator follow before upgrading to vSphere 6.5? (Choose three.)___
A. Disconnect ESXi host from vCenter.
B. VMware Tools are installed in the virtual machine.
C. Ensure that the system hardware complies with ESXi requirements.
D. Back up the host.
E. Check the interoperability of any other software integrated with vSphere.
【多选题】
What are two requirements to enable EVC in vSphere DRS cluster? (Choose two.)___
A. CPUs must be from the same vendor.
B. EVC must use the lowest possible baseline supported by the hardware.
C. CPUs must be in the same family and of the same speed.
D. No VMs may be running in the cluster.
【多选题】
What three conditions could result in VMware Flash Read Cache being unable to claim a disk? (Choose three.)___
A. The disk is not listed in the VMware hardware compatibility guide.
B. The disk is not detected as an SSD.
C. The disk is not detected as local.
D. The disk is in use by VMFs.
【多选题】
Boot from SAN is supported on which three storage technologies? (Choose three.)___
A. VMware vSAN
B. FCoE
C. NFS 4.1
D. iSCSI
E. FC
【多选题】
Which two components are part of storage I/O multipathing on ESXi? (Choose two.)___
A. SATP
B. VASA
C. PSP
D. VAAI
【多选题】
Which two statements are true about Highly Available vSphere Auto Deploy infrastructure? (Choose two.)___
A. It helps prevent data loss.
B. It is a prerequisite for using vSphere Auto Deploy with stateful install.
C. It requires two or more Auto
D. eploy servers.
【多选题】
The virtual machine log rotation size can be changed for all VMs by which two interfaces? (Choose two.)___
A. PowerCLI
B. vSphere Web Client
C. ESXi host client
D. esxcli
【多选题】
Which two configuration options can exclude virtual disks from snapshot operations? (Choose two.)___
A. Use RDM in virtual mode for virtual disk.
B. Use virtual disks in Independent – Persistent mode.
C. Use a virtual disk larger than 2 TB in size.
D. Use RDM in physical mode for virtual disk.
【多选题】
Which two storage configurations on the source server are unsupported with VMware Converter? (Choose two.)___
A. Linux LVM
B. software RAID
C. GPT/MBR hybrid disks
D. Windows basic volumes
E. Windows dynamic volumes
【多选题】
Which two statements about vCenter HA are correct? (Choose two.)___
A. ESXi 5.5 or later is required.
B. vCenter HA network latency between nodes must be less than 50 ms.
C. NFS datastore is supported.
D. It must be deployed on a 3
E. SXi host cluster with DRS enabled.
【多选题】
An attempt to delete NFS datastore from a ESXi host returns the error: Sysinfo error on operation returned the following status:< Busy> Which two statements could explain this failure? (Choose two.)___
A. NFS datastore is a part of Storage DRS Cluster.
B. NFS.VolumeRemountFrequency value is set to 30.
C. Storage I/O Control is enabled on NFS datastore.
D. NFS datastore has running or registered virtual machines.
【多选题】
An administrator finds that the Microsoft Exchange virtual machines are exhibiting network latency. What two in-guest changes can help decrease latency? (Choose two.)___
A. LRO
B. TSO
C. SR-IOV
D. PVRDMA
【多选题】
Which two types of iSCSI adapters require VMkernel networking configuration? (Choose two.)___
A. dependent hardware
B. in-guest
C. software
D. independent hardware
【多选题】
Which two statements are true for NFS v4.1 firewall behavior? (Choose two.)___
A. It closes port 2049.
B. It sets allowed. All flag to TRUE.
C. It sets allowed. All flag to FALSE.
D. It opens port 2049.
【多选题】
A vSphere Administrator attempts to enable Fault Tolerance for a virtual machine but receives the following error: Secondary VM could not be powered on as there are no compatible hosts that can accommodate it. What two options could cause this error? (Choose two.)___
A. The other ESXi host(s) are in Maintenance Mode.
B. Hardware virtualization is not enabled on the other ESXi host(s).
C. The other ESXi host(s) are in Quarantine Mode.
D. Hardware MMU is enabled on the other
E. SXi host(s).
【多选题】
Storage capabilities be populated in what two ways? (Choose two.)___
A. The administrator can use tags to describe capabilities.
B. Default capabilities are provided by vCenter Server.
C. Datastores can advertise their capabilities through VAAI.
D. Datastores can advertise their capabilities through VASA.
推荐试题
【单选题】
电源系统中，下列哪些被系统探测到的故障会导致发动机相应的发电机切断或停止工作？___
A. IDG被脱开、ENG火警电门被作动、PMG（永磁发电机）短路
B. 发生了过/欠电流、电压、频率故障；
C. 输电电缆开路或短路；差动保护
D. A、B、C均正确
【单选题】
电源系统中EGIU的主要功能是：___
A. 控制发电机电压的产生并保护发电机
B. 提供电源系统的自检功能，并发送关联的警告
C. 处理来自GCU和关联发电机的参数，并通过系统数据采集器（SDAC）传输信息到驾驶舱
D. A、B、C均是EGIU的主要功能
【单选题】
电源系统中安装在发动机上的整体驱动发电机（IDG）包括了：___
A. 附件齿轮箱和发电机
B. 附件齿轮箱和恒速驱动装置（CSD）
C. 恒速驱动装置（CSD）和发电机
D. 附件齿轮箱、恒速驱动装置（CSD）和发电机
【单选题】
飞机电瓶的主要功用是：___
A. 在飞行或在地面状态下，提供起动APU的电源
B. 在应急状态下，向基本汇流条提供电源
C. 在飞行或在地面状态下，提供起动APU的电源；在应急状态下，向基本（ESS）汇流条提供电源
D. 在飞行或在地面状态下，提供起动APU的电源；在多数电源构型状况下，向基本（ESS）汇流条提供电源
【单选题】
飞机在正常通电的情况下，飞机直流电源由（——）提供。___
A. 仅仅由一台电瓶提供直流电源，另一台作为备份直流电源使用
B. 由两台电瓶提供直流电源
C. 由两台电瓶和两台变压整流器器（TR1、TR2）提供直流电源
D. 由两台电瓶和三台变压整流器器（TR1、TR2、TR3）提供直流电源
【单选题】
飞机直流电源分配系统中，通常情况下TR2（变压整流器2）向DCBUS2汇流条供电。当TR2失效后，系统将：___
A. 静变流机将替代TR2恢复向DCBUS2汇流条供电
B. CSM/G（应急马达发电机）将自动工作，替代TR2恢复向DCBUS2汇流条供电
C. TR1将替代TR2恢复向DCBUS2汇流条供电
D. ESSTR将替代TR2恢复向DCBUS2汇流条供电
【单选题】
飞机直流电源分配系统中，正常情况下当TR1失效后，系统将：___
A. 静变流机将替代TR1恢复供电
B. CSM/G（应急马达）将自动工作，替代TR1恢复供电
C. TR2将替代TR1恢复供电
D. ESSTR将替代TR1恢复供电
【单选题】
关于IDG构成的说法，哪个正确：___
A. IDG主要构成是发电机
B. IDG主要由CSD和滑油冷却器组成
C. IDG主要由发电机和滑油冷却器组成
D. IDG主要由CSD和发电机组成
【单选题】
关于发动机整体驱动装置（IDG）复位的说法，正确的是：___
A. 相应发动机上的IDG复位工作，只能在地面状态下，且发动机停止运转的情况下进行
B. IDG的复位是通过IDG上的复位手柄来实现的
C. 当IDG被脱开后，必须尽快根据情况进行复位或其它维护工作，避免长时间IDG在脱开的情况下运转
D. A、B、C均正确
【单选题】
关于脱开发动机整体驱动装置（IDG）的说法，正确的是：___
A. 飞机在空中脱开相应的IDG后，是不能在进行系统复位
B. 当发动机停止运转的情况下，IDG是不能够被脱开的
C. IDG是不能够长时间在脱开模式下运作
D. A、B、C均正确
【单选题】
如果仅有一台发电机在使用，则厨房电源自动卸载时，此卸载信息显示在：___
A. “GALLEYSHED”字样ECAM的下显示页面
B. GALY&CAB按钮电门上的FAULT灯显示
C. A、B都正确
D. 以上均不正确
【单选题】
维护手册中关于跳开关的描述，如：PANEL/2000VU；DESIGNATION/CABINLIGHTPOWER-WINDOWFWD；IDENT/300LG；LOCATION/H01。可以从中看到此跳开关的哪些具体信息？___
A. 该跳开关的功能项目号是：300LG；安装在2000VU面板上的H01位置；基本的功能描述是：CABINLIGHTPOWERWINDOWFWD
B. 该跳开关的功能项目号是：H01；安装在2000VU面板上的300LG位置；基本的功能描述是：CABINLIGHTPOWERWINDOWFWD
C. 该跳开关的功能项目号是：2000VU；安装在H01面板上的300LG位置；基本的功能描述是：CABINLIGHTPOWERWINDOWFWD
D. 该跳开关的功能项目号是：300LG；安装在H01面板上的2000VU位置；基本的功能描述是：CABINLIGHTPOWERWINDOWFWD
【单选题】
应急发电系统中，应急马达发电机（CSM/G）由（——）驱动___
A. 来自黄液压系统的动力
B. 来自绿液压系统的动力
C. 来自蓝液压系统的动力
D. A、B、C均可驱动CSM/G
【单选题】
应急马达发电机控制器（CSM/G）的主要功用是：___
A. 在飞行中，电源系统丢失ACBUS1和ACBUS2电源后，自动控制RAT的放出和CSM/G的工作
B. 在飞行中，电源系统丢失ACBUS1和ACBUS2电源后，自动控制CSM/G的工作
C. 在任何时候，电源系统丢失ACBUS1和ACBUS2电源后，自动控制RAT的放出和CSM/G的工作
D. 获得应急电源面板上“MANON”电门信号后，控制RAT的放出和CSM/G的工作
【单选题】
在对发动机上的IDG（整体驱动发电机）滑油量进行检查的时候，下列那种情况需要对IDG滑油进行加油勤务？（1）滑油油面处于红色指示area；（2）滑油油面处于黄色指示area；（3）滑油油面处于绿色area；（4）滑油油面低于绿色area。___
A. （1）、（2）
B. （2）、（3）
C. （3）、（4）
D. （1）、（4）
【单选题】
在什么情况下，下ECAM页面上的“ELEC”页面会自动显示？___
A. 当电源系统中一个CLASS1、CLASS2、CLASS3故障发生后
B. 当电源系统中一个CLASS1、CLASS2故障发生后
C. 当电源系统中一个CLASS1故障发生后
D. 操作任何头顶35VU电源面板上电门后
【单选题】
在什么情况下，下ECAM页面上会显示“ELEC”页面？___
A. 人工选择ECAM控制面板上的“ELEC”按钮；或当电源系统中一个CLASS1故障发生后
B. 仅能通过人工选择ECAM控制面板上的“ELEC”按钮
C. 当电源系统中一个CLASS1故障发生后；或操作任何头顶35VU电源面板上电门后
D. 操作任何头顶35VU电源面板上电门后
【单选题】
在正常情况下，电网中的直流电源主要由（——）提供。___
A. TR1（变压整流器1）和TR2（变压整流器2）
B. TR1、TR2、及ESSTR
C. BAT1和BAT2
D. BAT1、BAT2、TR1、TR2、ESSTR
【单选题】
直流电源系统中，驾驶舱头顶35VU“ELEC”面板的“电瓶”按钮电门上的“FAULT”灯在什么情况下会燃亮？___
A. 当电瓶电门设置到“OFF”位置
B. 当电瓶丢失或一个电瓶内部的短路发生
C. 当电瓶充电机的充电电流过高
D. 当电瓶过热现象发生
【单选题】
电源系统中，APU不经过附件恒速装置直接驱动APU发电机，这是因为：___
A. APU发电机内包含有恒速装置
B. APU转速恒定，输出到发电机的速度也保持恒定
C. APU发电机产生的电源经过电源系统整流后转换成频率恒定的电源
D. 以上描述均不正确
【单选题】
关于飞机发动机和APU的发电机控制组件GCU的说法错误的是：___
A. 发电机的输出电压是由GCU控制调节的
B. 左右发动机的发电机GCU与APU发电机的GCU一样，可以互换
C. 发电机的故障保护是通过GCU实现的
D. 发电机的电源参数是GCU直接送到SDAC显示的
【单选题】
DC电源系统中，两个BCL（电瓶充电限制器）的工作是受到谁的控制？___
A. 受到驾驶舱头顶35VU电气面板上相应的“BAT”电门控制
B. 受到GPCU的自动控制
C. 受到驾驶舱头顶35VU电气面板上任一“BAT”电门控制
D. 受到GCU的自动控制
【单选题】
当ESSTR使用后应当如何进行复位？___
A. 当飞机接通电源的时候，系统将自动进行复位置
B. 通过103VU面板上的“TRRST”电门复位ESSTR保护
C. 先确保电网向ESSTR内部主线圈供电；再通过103VU面板上的“TRRST”电门复位ESSTR保护
D. 通过CFDS来对ESSTR进行复位
【单选题】
当IDG（整体驱动发电机）被脱开后，在（——）完成复位工作。___
A. 空中或地面，发动机运转的状态下由飞行员完成
B. 在空中状态下由飞行员完成；在地面，发动机切断的状态下由地面勤务人员完成
C. 只能在空中，发动机运转的状态下完成
D. 只能在地面状态下完成
【单选题】
当飞机在空中突然丢失ACBUS1和ACBUS2电源的情况下，电源系统将如何保证必要的电源供应？___
A. 静变流机将自动工作，为部分重要汇流条提供应急电源
B. RAT（冲压涡轮）将自动释放，同时CSM/G开始自动工作，为系统提供有限的液压和应急电源
C. TR（变压整流器）将自动工作，为部分重要汇流条提供应急电源
D. BAT1和BAT2为部分重要汇流条提供应急电源
【单选题】
当工作人员在进行维护作业的过程中，断开驾驶舱后条开关面板上的某个跳开关，稍后在ECAM显示器上出现相关跳开关的信息，这说明该跳开关：___
A. 被脱开跳开关所对应的系统探测到跳开关被断开，并通过相关系统在ECAM上显示
B. 系统维护作业程序中正常出现的现象，属于正常信息
C. 被脱开的电路跳开关包含有连接到SDAC的辅助线路
D. 被脱开的电路跳开关包含有连接到CFDS的辅助线路
【单选题】
当直流电网中，如果TR1、TR2单独或同时发生故障，此时（——）将向部分直流电网供电。___
A. BAT1（1号电瓶）
B. BAT2（2号电瓶）
C. 静变流机
D. ESSTR（）
【单选题】
电源分配系统中，发电机电源输电馈线为什么单独布置，而没有与其他导线捆扎在一起？___
A. 与其他导线捆扎在一起会使输电馈线产生的热量不容易散发
B. 与输电馈线捆扎在一起会使其他导线容易磨损，继而造成线路短路
C. 与输电馈线捆扎在一起会使其他导线容易受到电源产生的电磁干扰，及导致电弧的机率增大
D. 与输电馈线捆扎在一起会使其他导线不容易辨认，及造成更换输电馈线困难
【单选题】
电源系统中，当TR1或TR2发生故障的情况下DCESSBUS将从那里获得电源？___
A. 通过ESSTR从ACESSBUS获得电源
B. DCBATBUS
C. CSM/G（应急马达发电机）
D. DCBUS1
【单选题】
电源系统中，闪电保护装置的作用是：___
A. 防止与IDG三相输电线相连的设备受到雷电冲击
B. 防止飞机上所有的设备受到雷电冲击
C. 防止飞机所有电路受到雷电冲击
D. 防止飞机受到雷电冲击
【单选题】
电源系统中IDG（整体驱动发电机）通过（——）从（——）获得足够的转速。___
A. 附件齿轮箱；发动机的LP转子
B. 恒速装置；发动机的LP转子
C. 附件齿轮箱；发动机的HP转子
D. 恒速装置；发动机的HP转子
【单选题】
电源系统中安装了两台EGIU（电源接口组件），它们分别接受哪个系统的信号？___
A. 两台EGIU分别接受相应GCU1、2的参数信号
B. 两台EGIU分别接收外电源和APU发电机的参数信号
C. 一台EGIU接收外电源和APU发电机的参数信号；另一台接收GCU1、2的参数信号
D. 一台EGIU接收GCU1和外电源的参数信号；另一台EGIU接收GCU2和APU发电机的参数信号
【单选题】
电源系统中静变流机的运转方式是：___
A. 当仅仅在只有电瓶工作的情况下，静变流机工作
B. 当有一台主发电机故障的情况下，静变流机工作
C. 当两台主发电机及APU发电机均故障的情况下，静变流机工作
D. 只要飞机电源系统接通电源的情况下，静变流机一直工作
【单选题】
对于厨房的自动卸载，正确的说法是：___
A. 在空中或地面状态，当只有一台主发电机工作的情况下系统将卸载厨房的大部分电源供应
B. 在空中或地面状态，当只有一台主发电机工作的情况下系统将卸载厨房的全部电源供应
C. 只有处于地面状态，当只有一台主发电机工作的情况下系统将卸载厨房的大部分电源供应
D. 只有处于空中状态，当只有一台主发电机工作的情况下系统将卸载厨房的全部电源供应
【单选题】
飞机电瓶的主参数是通过（——）在（——）显示。___
A. 相应的BCL（电瓶充电限制器）；下ECAM显示器上的ELEC页面
B. 相应的BCL（电瓶充电限制器）；上ECAM显示器上的ELEC页面
C. 相应的GCU；下ECAM显示器上的ELEC页面
D. 相应的GCU；上ECAM显示器上的ELEC页面
【单选题】
飞机电源系统在紧急的情况下，静变流机将来自（——）的28V直流电转换为115V交流电提供给飞机基本重要系统使用。___
A. BAT1
B. BAT2
C. BAT1和BAT2共同提供
D. BAT1或BAT2
