更多"[单选题] About ______ of the earth’s w"的相关试题:
[单选题] We only use ______ of the earth’s water.
A. 5%
B. 97.4%
C. 2.5%
D. 1%
[单选题] The teacher told the pupils that the earth ________ around the sun.
A. moves
B. move
C. will move
D. would move
[单选题] ________ of the surface of the earth is covered with water.
A. Third-fourth
B. Three-fourths
C. Three-fourth
D. Third-fourths
[判断题]A380飞机Water collection bag是水收集袋
A.正确
B.错误
[判断题]Google Earth是一款Google公司开发的虚拟地球仪软件，也把卫星照片、航空照片和GIS布置在一个地球的三维模型上。
A.正确
B.错误
[单选题] Most of the fresh water is ______ .
A. snow and ice
B. rain
C. in lakes and rivers
D. in oceans
[单选题] It rains after the water ______ from oceans, lakes and rivers.
A. falls
B. enjoys
C. evaporates
D. runs
[单选题] The thermos is used for _________ water hot.
A. to keep
B. keeping
C. keep
D. kept
[判断题]A330-200飞机每个厨房的饮用水由水关断活门（WATER SHUT－OFF VALVE）控制，将供水关断活门放于关断位可切断该厨房及附近洗手间用水
A.正确
B.错误
[单选题]A330-300飞机每个厨房的饮用水由水关断活门（WATER SHUT－OFF VALVE）控制，将供水关断活门放于关断位可切断该厨房及附近洗手间用水。 答案：B
A.A:是
B.B:否
C.A:是
D.B:否
[单选题]CT12K云高仪在STA命令中以S1,S2,S3,S4,S5,S6,S7,S8,S9,S10显示工作状态，当S2＝1时，说明设备()。
A.硬件告警
B.温度告警
C.供电电压告警
[判断题]CRJ900NG机型任何时候，只要水箱水位低于水位传感器时，LOW WATER 灯亮，加热器断开。
A.正确
B.错误
[多选题]
Which two statements about antivirus scanning mode are true? (Choose two.)
A. In proxy-based inspection mode files bigger than the buffer size are scanned.
B. In flow-based inspection mode. FortiGate buffers the file but also simultaneously transmits it to the client.
C. In proxy-based inspection mode antivirus scanning buffers the whole file for scanning before sending it to the client.
D. In flow-based inspection mode files bigger than the buffer size are scanned.
[多选题]
Which three statements about security associations (SA) in IPsec are correct? (Choose three.)
A. Phase 2 SAs are used for encrypting and decrypting the data exchanged through the tunnel.
B. An SA never expires.
C. A phase 1 SA is bidirectional while a phase 2 SA is directional.
D. Phase 2 SA expiration can be time-based volume-based or both.
E. Both the phase 1 SA and phase 2 SA are bidirectional.
[单选题]
Which statement about the IP authentication header (AH) used by IPsec is true?
A. AH does not provide any data integrity or encryption.
B. AH does not support perfect forward secrecy.
C. AH provides data integrity bur no encryption.
D. AH provides strong data integrity but weak encryption.
[多选题]
Which two statements about IPsec authentication on FortiGate are correct? (Choose two.)
A. For a stronger authentication you can also enable extended authentication (XAuth) to request the remote peer to provide a username and password
B. FortiGate supports pre-shared key and signature as authentication methods.
C. Enabling XAuth results in a faster authentication because fewer packets are exchanged.
D. A certificate is not required on the remote peer when you set the signature as the authentication method.
[多选题]Which statements about the firmware upgrade process on an active-active HA cluster are true? (Choose two.)
A. The firmware image must be manually uploaded to each FortiGate.
B. Only secondary FortiGate devices are rebooted.
C. Uninterruptable upgrade is enabled by default.
D. Traffic load balancing is temporally disabled while upgrading the firmware.
[多选题]
Which of the following statements about central NAT are true? (Choose two.)
A. IP tool references must be removed from existing firewall policies before enabling central NAT.
B. Central NAT can be enabled or disabled from the CLI only.
C. Source NAT using central NAT requires at least one central SNAT policy.
D. Destination NAT using central NAT requires a VIP object as the destination address in a firewall.
[多选题]
Which two statements are true about collector agent standard access mode? (Choose two.)
A. Standard mode uses Windows convention-NetBios: Domain\Username.
B. Standard mode security profiles apply to organizational units (OU).
C. Standard mode security profiles apply to user groups.
D. Standard access mode supports nested groups.
