【单选题】
Which method is supported for backing up the virtual machine that contains vCenter Server?___
A. differential
B. incremental
C. full image
D. individual disks
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相关试题
【单选题】
A vSphere Administrator must ensure that a user is able to view and manage the system configuration in vSphere Web Client. In the vCenter Single Sign-On domain, which group should the user be a part of?___
A. SystemConfiguration.BashShellAdministrators
B. ComponentManager. Administrators
C. Administrators
D. SystemConfiguration.Administrators
【单选题】
What is the minimum number of hosts that must contribute capacity to a non-ROBO single site VMware vSAN cluster?___
【单选题】
Which guest operating system supports PVRDMA?___
A. Windows (32-Bit)
B. Linux (32-Bit)
C. Windows (64-Bit)
D. Linux (64-Bit)
【单选题】
What is the correct way to replace the certificate on an existing vCenter Server that is part of a vCenter HA configuration?___
A. Put the vCenter HA in Maintenance mode, replace the certificate, exit Maintenance mode.
B. Shut down Passive and Witness nodes and replace the certificate on the Active node.
C. Remove the Passive and Witness nodes, replace the certificate, reconfigure the cluster.
D. Replace the certificate while all nodes are participating in the cluster.
【单选题】
The vSphere Data Protection performance analysis results in the “Conditionally Passed” status. What can cause this condition?___
A. The results did not meet the minimum performance expectations.
B. The read, write, and seek tests were successful.
C. The read and write tests were successful but the seek test failed.
D. The read and write tests were successful but the seek test skipped.
【单选题】
A vSphere Administrator wants to reserve 0.5 Gbps for virtual machines on each uplink on a disturbed switch that has 10 uplinks. What is the quota that should be reserved for the network resource pool?___
A. 10 Gbps
B. 5 Gbps
C. 100 Gbps
D. 0.5 Gbps
【单选题】
A vSphere administrator manages a cluster which includes critical and non-critical virtual machines. The cluster requires different permissions for contractors and non-contractors. How can the administrator exclude the contractor group from some of the critical VMs?___
A. Apply permission for both contractors and non-contractors on the cluster level.
B. Apply permission for both contractors and non-contractors on the cluster level. Remove permission on the critical VMs for contractors.
C. Remove permission for contractors on the cluster level. Apply permission on the critical VMs for noncontractors.
D. Apply permission for both contractors and non-contractors on the VMs. Remove permission on the critical VMs for contractors.
【单选题】
In an ESXi 6.5 cluster only "NFS datastore has running or registered virtual machines" returns. A vSphere HA cluster with four hosts has admission control configured to tolerate one host failure. Which statement is true if a fifth host is added?___
A. CPU and Memory capacity will be set to 50%.
B. CPU and Memory capacity will be set to 30%.
C. CPU and Memory capacity will be set to 25%.
D. CPU and Memory capacity will be set to 20%.
【单选题】
Which command can be run to troubleshoot connectivity problems with vmkernal network interfaces?___
A. esxcli network
B. vmkping
C. net-status
D. vicfg-vmknic
【单选题】
What counter should an administrator check to determine if a virtual machine is ballooning?___
A. swapinRate
B. vmmemctltarget
C. swapped
D. vmmemctl
【单选题】
By default, how often is the vCenter vpx user password automatically changed?___
A. 15 days
B. 60 days
C. 30 days
D. 45 days
【单选题】
Which metric in the Exhibit would identify high latency for a virtual machine operating system?___
A. QAVG/cmd
B. KAVG/cmd
C. DAVG/cmd
D. GAVG/cmd
【单选题】
What VM Monitoring setting would ensure that the failure interval for a virtual machine is defined as 120 seconds?___
A. High
B. Normal
C. Low
D. Medium
【单选题】
The business managers have asked the IT administrator to ensure configuration compliance in the vSphere infrastructure. The IT administrator wants to use Host Profiles to accomplish this, but is unable to do so. Why is the administrator unable to use Host Profiles?___
A. The infrastructure uses a vSphere Standard license.
B. The infrastructure has servers with various CPU families.
C. The user has only the “Administrator” role.
D. Host Profiles apply only to storage settings.
【单选题】
What is the result of a “Consolidate” action on a virtual machine?___
A. All snapshots on the virtual machines will be deleted.
B. The virtual machine will be reverted to its last snapshot.
C. Redundant delta disks will be combined and deleted.
D. A new snapshot with memory state will be created.
【单选题】
A Telco customer is implementing NFV using vSphere as the virtualization platform. Which feature can help achieve a high packet rate with lower CPU consumption?___
A. Network I/O Control
B. SplitRX
C. ERSPAN
D. LACP
【单选题】
What is the VMware-recommended best practice for Fibre Channel zoning?___
A. soft zoning
B. single-initiator-multiple-target zoning
C. single-initiator zoning
D. single-initiator-single-target zoning
【单选题】
How can a vSphere administrator ensure that a set of virtual machines run on different hosts in a DRS cluster?___
A. Use a VM-Host affinity rule.
B. Add the VMs to a vApp.
C. Use a VM-VM affinity rule.
D. Place the VMs in different folders.
【单选题】
vCenter Server Appliance Instance can be backed up using which Client Interface?___
A. vSphere Client Interface
B. vSphere Web Client Interface
C. VMware Host Client Interface
D. Virtual Appliance Management Interface
【单选题】
What tool can capture network traffic at the uplinks, or vSwitch, or virtual port levels?___
A. tcpdump-uw
B. wireshark
C. pktcap-uw
D. pcap
【单选题】
Which storage feature always requires the use of third-party software on ESXi?___
A. Hardware Acceleration for NAS devices
B. VVOL
C. Hardware Acceleration for Block
D. evices
【单选题】
An ESXi host's VMCA-Signed certificate has expired. How can the certificate be renewed?___
A. In the vSphere Web Client, browse to the host in question. Click the Manage tab and select settings. Select System and click Certificate, then click the Renew button.
B. In the vSphere Web Client, browse to the host in question. Click the Manage tab and select settings. Select System and click Certificate, then click the Refresh CA Certificates button.
C. Run the command /sbin/generate-certificates on the affected host.
D. Disconnect the host from vCenter Server and reconnect it.
【单选题】
Which is the correct order for upgrading vSphere components?___
A. vCenter Server, ESXi hosts, VMware Tools, Virtual Machine hardware
B. VMware Tools, Virtual Machine hardware, ESXi hosts, vCenter Server
C. vCenter Server, Virtual Machine hardware, VMware tools, ESXi hosts
D. ESXi hosts, vCenter Server, Virtual Machine hardware, VMware Tools
【单选题】
Which iSCSI initiator type can be used with any network interface card?___
A. Software iSCSI initiator
B. Software FCoE adapter
C. Hardware Independent iSCSI initiator
D. Hardware Dependent iSCSI initiator
【单选题】
An administrator is attempting to power on a virtual machine with 32GB of memory. The operation fails with the following error: <Could not power on VM: No space left on device> <Checking the space on the virtual machine's datastore, there is 30GB free.> Which action would allow the VM to power on?___
A. Set a 2GB memory reservation on the VM.
B. Mount the virtual disk from the affected VM on to another virtual machine and free up space from within the OS.
C. Enable vSphere HD admission control on the cluster in which the VM resides.
D. Set a 2GB memory limit on the VM.
【单选题】
An administrator attempts to manually reclaim space on thin-provisioned VMFS6 volumes but finds that no additional space is being recovered. Which could be causing this?___
A. vSphere 6.5 does not support manual UNMAP.
B. The manual UNMAP operation has been moved to the vSphere web client.
C. The VASA version is use is incompatible.
D. UNMAP is automated for VMFS6.
【单选题】
An administrator has upgraded to vSphere 6.5 and also wants to use Kerberos authentication for NFS. Which can be done to the existing NFSv3 volumes to enable this feature?___
A. Perform a storage rescan on VMFS volumes.
B. Unmount the NFSv3 datastore, and then mount as NFSv4.1 datastore.
C. Nothing. All NFSv3 mounted datastores are upgraded automatically during vSphere upgrades.
D. Perform a scan of new storage devices.
【单选题】
An administrator wants to restore the vCenter Server Appliance 6.5 from backup. Where can this be accomplished?___
A. from the ESXi Host Client
B. from the VMware vSphere Appliance Management Interface
C. from within the VMware vSphere Web Client
D. from the vCenter Server Appliance Installer
【单选题】
The administrator wants to power on VM-K2, which has a 2GHz CPU reservation. VM-M1, VM-M2, and VM-K1 are all powered on. VM-K2 is not powered on. The exhibit shows the parent and child resource reservations. If Resource Pool RP-KID is configured with an expandable reservation, which statement is true?___
A. VM-K2 will be unable to power on because there are insufficient resources.
B. VM-K2 will be able to power on since resource pool RP-KID has 2GHz available.
C. VM-K2 will be unable to power on because only 2GHz are reserved for RP-KID.
D. VM-K2 will receive resource priority and will be able to power on this scenario.
【单选题】
Which is the block size on the VMFS6 datastore?___
A. All small and large file blocks are 8MB.
B. All small and large file blocks are 1MB.
C. Small file blocks are 512KB. large file blocks are 64MB.
D. Small file blocks are 1MB, large file blocks are 512MB.
【单选题】
When installing vCenter Converter Standalone, why must an administrator perform a client-server installation instead of a local installation?___
A. to manage conversion tasks remotely
B. to convert virtual machines as well as physical machines
C. to allow installation of the Converter agent on remote source machines
D. to hot clone physical or virtual machines
【单选题】
Which is required by vCenter Converter Standalone to convert a physical Red Hat Enterprise Linux 7 machine to a virtual machine?___
A. The Linux machine must be powered off.
B. The Linux machine must have the SSH daemon started.
C. The Linux machine must use a static IP address.
D. The Linux machine must have a fully-qualified domain name.
【单选题】
An administrator is troubleshooting network communications between a vCenter Server and an ESXi 6.5 host. Which log shows the related events between these components?___
A. /var/log/fdm.log
B. /var/log/vpxa.log
C. /var/log/hostd.log
D. /var/log/auth.log
【单选题】
An administrator has recently upgraded from vSphere 6.0 to 6.5, and can no longer see the software iSCSI named vmhba33. Which could be the reason for this?___
A. The upgrade has changed the vmhba name.
B. vSphere 6.5 automates iSCSI configurations.
C. vSphere 6.5 no longer supports software iSCSI.
D. The upgrade has deleted the vmhba.
【单选题】
An administrator is trying to vMotion a VM from his datacenter to a recovery site. Which is the maximum allowed RTT (Round-Trip Time) latency between source and destination host?___
A. 100 milliseconds
B. 150 milliseconds
C. 15 milliseconds
D. 10 milliseconds
【单选题】
Which is required for configuring iSCSI Software Adapter network port binding?___
A. VMkernel of the iSCSI traffic must be load balanced using Route based on IP Hash algorithm.
B. VMkernel of the iSCSI traffic must be load balanced using Route based on Source Virtual Port ID algorithm.
C. VMkernel of the iSCSI traffic must be load balanced using Route based on Source MAC Hash algorithm.
D. VMkernel of the iSCSI traffic must be bound to only one active network adapter.
【单选题】
In vSphere Data Protection 6.1, which is the function of a Backup Verification job?___
A. None. Backup Verification job is not a feature of vSphere Data Protection
B. It is a manual task -Power it on -Verify the guest OS -Check started applications
C. It is an automatic process -Restore a virtual machine -Power it on -Verify that the guest OS is booted by communicating with the Backup Verification agent
D. It is an automatic process -Restore a virtual machine -Power it on -Verify that the guest OC is booted by detecting the VMware ToolsTM "heartbeats"
【单选题】
An administrator has enabled vSphere Distributed Switch Health Check. The hosts connected to that Distributed Switch all display an alert:< vSphere Distributed Switch MTU supported status > .The administrator has all of the VMkernel ports MTU sizes set to 1600. Which action will remedy this problem?___
A. Configure the Distributed Switch to MTU 9100.
B. Disconnect and reconnect the physical network cable.
C. Configure the physical switch to MTU 1600.
D. Disable the Distributed Switch MTU.
【单选题】
Which Host Profile Subprofile configuration is used to configure firewall settings for ESXi hosts?___
A. Advanced Configuration Settings
B. General System Settings
C. Security
D. Networking
【单选题】
Where would a vSphere administrator find general vCenter Server logs on a vCenter Server Appliance?___
A. /var/log/vmware/vpxd/
B. /var/log/messages
C. /etc/vmware-vpx/
D. /var/log/vmware/vsan-health/
推荐试题
【多选题】
"44.采用战略合作/框架协议采购的物资应满足以下哪些条件？___
A. 该类物资的型号、规格等主要技术参数已确定，但数量可根据实际需要进行调整；
B. 在一定时期内需要多次重复购买的物资；
C. 因办公、管理需要而发生的不可预见小额零星物资需求；
D. 采用战略/框架合作方式采购的物资应是在一定时期内单价比较稳定或有明确且公认价格参照体系的物资。
【多选题】
"45.服务采购合同指本公司依法对外签订的生产、综合类项目（施工与服务）及中介服务，包括___
A. 生产施工类合同
B. 技术服务类合同
C. 综合管理类合同
D. 销售合同
E. 政策处理类合同
【多选题】
"46.生产施工类合同包括___
A. 检（维）修
B. 技术改造
C. 调试
D. 科技研发
E. 改线施工
【多选题】
"47.政策处理类合同包括___
A. 征地
B. 借地
C. 租地
D. 测量
E. 评估
【多选题】
"48.合同承办部门负责管理( )等的实施，负责组织项目工程量签证、验收。___
A. 技术
B. 设计
C. 进度
D. 安全
E. 质量
【多选题】
经部门自行采购管理流程的项目包括（）等，由计划发展部依据审批结果，在5个工作日内拟定合同初稿，经律师审查后，在ERP合同管理系统上发起合同创建。___
A. 水电合同
B. 110 联动安装
C. 110 联动服务
D. 生活外网
E. 垃圾清理
【多选题】
"50.合同谈判必须有（ ）等相关部门人员参加。___
A. 纪检审计室
B. 计划发展部
C. 技术质量部
D. 合同承办部门
E. 调度运行中心
【多选题】
"51.合同审核的主要内容___
A. 合同的范围、质量目标、工期要求、安全目标；
B. 项目的技术要求
C. 合同双方的权利和义务
D. 支付进度是否与工程进度相符
E. 认为必须审核的其他内容
【多选题】
52.在生产经营活动过程中，造成员工人身伤亡（包括急性工业中毒）、设备设施损坏且直接经济损失超过规定数额、停供气区域达到一定范围或停供时间超过规定值、环境污染区域达到一定范围或环境污染量超过规定值以及造成社会影响的各类生产性事故（事件),其中事故包含（）：___
A. 特别重大事故
B. 超大事故
C. 重大事故
D. 较大事故
E. 一般事故
F. 轻微事故
【多选题】
53.在生产经营活动过程中，造成员工人身伤亡（包括急性工业中毒）、设备设施损坏且直接经济损失超过规定数额、停供气区域达到一定范围或停供时间超过规定值、环境污染区域达到一定范围或环境污染量超过规定值以及造成社会影响的各类生产性事故（事件),其中事件包含（）：___
A. 设备障碍
B. 考核障碍
C. 一类障碍
D. 二类障碍
E. 异常
【多选题】
"54.事故事件发生后要立即组织调查，调查人员职责包括（）___
A. 查明事故（事件）发生的经过、原因、人员伤亡情况以及直接经济损失
B. 认定事故（事件）的性质和事故（事件）责任
C. 提出对事故（事件）责任者的处理建议
D. 总结事故（事件）教训，提出防范和整改措施以及完善相关制度的建议
E. 提交事故调查报告或事件分析报告
F. 相关人员的安全教育培训
【多选题】
"55.事故事件的间接原因是指客观上使系统防止事故（事件）发生能力下降，且必须在其他因素作用下方能导致事故（事件）发生的原因，下列属于间接原因的是（）___
A. 人的不安全行为
B. 技术和设计缺陷
C. 材料质量存在问题
D. 人员未经培训、缺乏或不懂安全操作技术知识
E. 劳动组织不合理
F. 对现场工作缺乏检查或错误指导
G. 没有安全操作规程或操作规程不健全、不按规章制度要求工作
【多选题】
"56.事故事件中对责任人员按照责任大小和承担责任的不同，分为（）___
A. 直接责任
B. 主要责任
C. 次要责任
D. 领导责任
E. 间接责任
【多选题】
"57.事故事件中，有下列情况之一时，应由肇事者或有关人员负直接责任或主要责任：（）___
A. 违章指挥或违章作业、冒险作业
B. 违反安全生产责任制和操作规程
C. 违反劳动纪律、擅自开动机械设备
D. 擅自更改、拆除、毁坏、挪用安全设施
E. 设备设施超过定期检验、试验、校验、检修期限或超负荷运行
F. 现场救援不及时或应急救援措施不当，导致事故后果扩大
【多选题】
"58.根据《建设工程施工合同(示范文本)》，采用变动总价合同时，双方约定可对合同价款进行调整的情形有( )。___
A. 承包人承担的损失超过其承受能力
B. 外汇汇率变化影响合同价款
C. 一周内非承包人原因停电造成的停工累计达到7小时
D. 工程造价管理部门公布的价格调整
E. 法律、行政法规和国家有关政策变化影响合同价款
【多选题】
"59.关于建设工程施工招标标前会议的说法，正确的有( )。___
A. 招标人对问题的答复函件须注明问题来源
B. 标前会议纪要与招标文件内容不一致时，应以招标文件为准
C. 标前会议是招标人按投标须知在规定的时间、地点召开的会议
D. 招标人可以根据实际情况在标前会议上确定延长投标截止时间
E. 标前会议结束后，招标人应将会议纪要用书面通知形式发给每个投标人
【多选题】
"60.根据《标准施工招标文件》，在合同履行中可以进行工程变更的情形有( )。___
A. 改变合同工程的标高
B. 改变合同中某项工作的施工时间
C. 为完成工程需要追加的额外工作
D. 改变合同中某项工作的质量标准
E. 取消合同中某项工作，转由发包人实施
【多选题】
"61.根据《建设工程施工劳务分包合同(示范文本)》，关于劳务分包人应承担义务的说法，正确的有( )。___
A. 须服从工程承包人转发的发包人及工程师的指令
B. 自觉接受工程承包人及有关部门的管理、监督和检查
C. 未经工程承包人授权或许可，不得擅自与发包人建立工作联系
D. 负责组织实施施工管理的各项工作，对工期和质量向发包人负责
E. 应按时提交有关技术经济资料，配合工程承包人办理竣工验收
【多选题】
"62.根据工程质量事故造成损失的程度分级，属于重大事故的有( )。___
A. 50人以上100人以下重伤
B. 5000万元以上1亿元以下直接经济损失
C. 3人以上10人以下死亡
D. 1亿元以上直接经济损失
E. 1000万元以上5000万元以下直接经济损失
【多选题】
"63.根据《建设工程安全生产管理条例》，应组织专家进行专项施工方案论证、审查的分部分项工程有( )。___
A. 深基坑工程
B. 起重吊装工程
C. 拆除工程
D. 地下暗挖工程
E. 高大模板工程
【多选题】
"64.关于生产安全事故报告和调查处理“四不放过”原则的说法，正确的有( )。___
A. 事故原因未查清不放过
B. 事故责任人员未受到处理不放过
C. 防范措施没有落实不放过
D. 职工群众未受到教育不放过
E. 事故未及时报告不放过
【多选题】
"65.若建设工程采用固定总价合同，承包商承担的风险主要有（ ）。___
A. 报价计算错误的风险
B. 物价、人工费上涨的风险
C. 工程变更的风险
D. 设计深度不够导致误差的风险
E. 投资失控的风险
【多选题】
"66.下列施工企业员工的安全教育中，属于经常性安全教育的有（ ）___
A. 事故现场会
B. 岗前三级教育
C. 变换岗位时的安全教育
D. 安全生产会议
E. 安全活动日
【多选题】
"67.关于施工项目投标保证金的说法，正确的有（）。___
A. 招标人在招标文件中可以要求投标人提交投标保证金
B. 投标保证金有效期应当与投标有效期一致
C. 两阶段进行招标的项目，投标保证金应当在第一阶段提出
D. 中标人无正当理由不与招标人订立合同，取消其中标资格、投标保证金不予退还
E. 投标保证金不得超过招标项目估算价的2%，但最高不得超过80万元人民币
【多选题】
"68.下列安全责任中，属于建设单位应当承担的有（）。___
A. 提供施工现场及毗邻区域内地下管线资料
B. 不得随意压缩合同工期
C. 足额使用安全施工措施所需费用
D. 不得租赁不符合安全施工要求的用具设备
E. 提出防范生产安全事故的指导意见和措施建议
【多选题】
"69.招标人有下列情形之的，可以对单位直接负责的主管人员和其他直接夷任人员依法给予处分的是()___
A. 确定的提交资格预审申请文件、投标文件的时限不符合《招标投标法》和《招标投标实施条例》的规定
B. 依法应当公开招标而采用邀请招标
C. 接受应当拒收的投标文件
D. 招标文件的发售、澄清、修改的时限不符合《招标投标法》和《招标投标实施条例》的规定
E. 接受未通过资格预审的单位或者个人参加投标
【多选题】
"70.对于地下情况复杂、危险性较大的挖掘项目，作业单位应根据情况，应组织隐蔽设施的主管单位联合进行现场地下设施交底，根据施工区域（）等相关情况，向作业人员提出具体要求___
A. 地质
B. 水文
C. 地下管道
D. 埋地电力电缆
E. 永久性标桩
F. 地质和地震部门设置的长期观测孔
【多选题】
"71.挖掘工作开始前应进行工作前安全分析，根据分析结果，确定应采取的相关措施，必要时制定挖掘方案。制定方案时应考虑以下内容：___
A. 交通状况
B. 附近的振动源
C. 隐蔽电气、管网等设施的分布情况
D. 邻近的建筑结构及其状况
E. 土质类型
【多选题】
"72.不得在邻近建筑物基础的水平面下或挡土墙的底脚下进行挖掘，除非在稳固的岩层上挖掘或已经采取了下列预防措施：___
A. 提供诸如托换基础的支撑系统
B. 建筑物距挖掘处有足够的距离
C. 挖掘工作不会对员工造成伤害
D. 建筑物有防护
【多选题】
"73.挖掘工作开始前应进行工作前安全分析，根据分析结果，确定应采取的相关措施，必要时制定挖掘方案。制定方案时应考虑以下内容：___
A. 对土壤和水的污染
B. 对空气的污染
C. 架空的公用设施
D. 挖出物及施工材料的存放
【多选题】
"74.挖掘工作开始前应进行工作前安全分析，根据分析结果，确定应采取的相关措施，必要时制定挖掘方案。制定方案时应考虑以下内容：___
A. 地表水和地下水
B. 有害气体易燃气体、液体排放（泄漏）
C. 使用的工器具
D. 气候
【多选题】
"75.项目不属于原年度计划的，需经项目（ ）批准后即为项目立项___
A. 费用归口管理部门
B. 计划发展部
C. 分管领导
D. 经营分管领导
E. 总经理
【多选题】
"76.项目属于年度计划内，但费用超出预算费用的，需经（）批准后实施___
A. 费用归口管理部门
B. 计划发展部
C. 分管领导
D. 经营分管领导
E. 总经理
【多选题】
"77.年度计划内的项目费用低于计划费用（减少20%及以上）或项目实施内容有重大调整但费用未超出计划费用的，经费用（）审核，报（ ）批准。___
A. 费用归口管理部门
B. 计划发展部
C. 分管领导
D. 经营分管领导
E. 总经理
【多选题】
"78.联系单一般包括（）___
A. 设计修改联系单
B. 工作联系单
C. 技术联系单
D. 工程量签证单
E. 工期调整联系单
【多选题】
79.自行采购物资采购公示内容包括___
A. 采购日期
B. 物资清单
C. 价格
D. 采购人员
【多选题】
"80.工程机械或车辆租赁公示内容包括___
A. 使用地点
B. 设备名称、型号
C. 租赁日期
D. 进出场时间
E. 价格
【多选题】
"81.资采购部、计划发展部、政治工作（监察审计）部对相关部门的物资和服务采购情况进行不定 期监督、指导，并纳入公司对部门的月度考核。考核主要内容包括：___
A. 自行采购的必要性及合理性
B. 自行采购是否超出规定范围及限额
C. 自行采购流程的规范性
D. 自行采购合法合规性
【多选题】
"生产、综合类（施工与服务）及中介机构服务采购方式有（）等。___
A. 公开招标
B. 邀请招标
C. SRM公开采购
D. SRM公开寻源
E. SRM邀请寻源
F. 竞争性谈判
G. 定向采购
H. 合同续签
【多选题】
"1.生产施工类合同包括___
A. 检（维）修
B. 建筑
C. 安装
D. 技术改造
E. 科技研发
F. 改线施工
