更多"[单选题]“_______” is the height above "的相关试题:
[单选题]“_______” is the height above the ground or water of the base of the lowest layer of cloud below 6000m covering more than half the sky.
A.Visibility
B.DDI
C.RVR
D.Ceiling
[单项选择]Which of the following is TRUE about ground water
A. It comes from the oceans.
B. It depends on seasonal rain.
C. It is 95% of all water.
D. It collects under the eart
[单项选择]The supply of ground water is getting low because of ______.
A. conservation
B. poisonous water
C. pollution
D. population increase
[单选题]Viewed from the aircraft, the top of the cloud looks bright, this means that the cloud layer _______.
A.is thin
B.contains little amount of water
C.is thick
D.contains many impurities
[单选题]The lowest VHF frequency of radio communication between air and ground is _______ .
A.118.00MHZ
B.118.1MHZ
C.117.5MHZ
D.117.0MHZ
[单选题]_______ is the lowest flight level available for use above the transition altitude.
A.Minimum level
B.Transition level
C.Trans flight
D.Low height
简述ISO OSI的物理层Layer1，链路层Layer2，网络层Layer3的任务。
[单项选择]Who has hallowed this ground
A. The brave people.
B. The living and the dead.
C. The people who are struggling or struggled here.
D. The brave people except us all.
[单项选择]
Traditional network layer packet forwarding relies on the information provided by network layer (1) protocols, or static routing, to make an independent (2) decision at each hop within the network. The forwarding (3) is based solely on the destination (4) IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost (5) toward a destination, the packets toward the destination might take one or both of them, resulting in
空白（1）处应选择（）
A. rotating
B. routing
C. transmission
D. management
[单选题]Ground, AFR369, push back completed, ready for _______ , information T.
A.taxi
B.departure
C.start up
D.radio check
[单项选择]
A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication, TCP uses port (1) to accomplish this. Another responsibility of a transport layer protocolis to create a (2) and error-control mechanism at the transport level. TCP uses a sliding(3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve(4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends (5) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.
空白（1）处应选择（）
A. numbers
B. connections
C. diagrams
D. resources
