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How does a DHCP server dynamically assign IP addresses to hosts?（）
A . Addresses are permanently assigned so that the host uses the same address at all times.
B . Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.
C . Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.
D . Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
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How does a switch respond when it receives a message?（）
A . It reads the Layer-5 information and sends the message directly to the intended computer.
B . It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.
C . It reads the Media Access Control (MAC) address and sends the message directly to the intended computer.
D . It reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.
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How does the effect known as “bank suction” act on a single-screw vessel proceeding along a narrow channel?（）
A . It pulls the stern toward the bank
B . It heels the vessel toward the bank
C . It pushes the entire vessel away from the bank
D . It pulls the bow toward the bank
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How does a controller-based access point configured to operate in sniffer mode behave？（）
A . allows client traffic， captures data on all channels
B . allows client traffic， captures data on a single channel
C . allows no client traffic， captures data on all channels
D . allows no client traffic， captures data on a single channel
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How does a coast radio station communicating by HF radio normally identify itself?（）
A . By its subscriber number
B . By its call sign
C . By its MMSI
D . By its MID
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How does a vessel’s rate of turn change when entering shallow water?（）
A . It is faster
B . It is slower
C . There is no change
D . It remains constant for varying propeller revolutio
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How does an IPv6 router deal with a packet that is larger than the outgoing interface MTU？（）
A . It will fragment the packet at Layer 2.
B . It will fragment the packet at Layer 3.
C . It will drop the packet and send an ICMPv6 message "packet too big" back to the source.
D . It will drop the packet.
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A:How long does the remittance take from New York? B:（）
A . I'm not sure. It depends on the mode your partner chose
B . I'm not sure about that. It is a big city
C . I don't know for sure. It is quite busy now in our bank
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By default, how often does a router running IGRP send its complete routing table to its neighbors?（）
A . Every 5 minutes
B . Every 90 seconds
C . Every 60 seconds
D . Every 30 second
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How does combustion air enter the cylinder of a two-cycle diesel engine?（）
A . Cylinder head valves
B . Ports
C . Turbo chargers
D . Bleeder valve
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How does Kevin 1990 make a living?
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How does the author develop a paragraph in the pattern of question-example-conclusion?
A、In the first part, the question should be raised.
B、In the second part, some examples related to the question should be provided.
C、The last part should be the conclusion.
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How does the wrong career lead to a midlife crisis?
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How many months does Chris have to live without a salary for a competitive internship at Dean Witter, a stock brokerage?
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How many whales does Japan kill a year and what does it say is the purpose?
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How much does a manicure and a pedicure cost if purchased without a special discount?
A、$ 100
B、$ 200
C、$ 120
D、$ 140
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How much does a pedicure cost according to the passage?
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If you create a pizza of your own in large size, how much does it cost at least？
A．$10. 25
B．$13. 50
C．$10. 75
D．$13. 00
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Auto workers negotiate a wage increase. How does this wage hike affect the supply of cars？
A．It decreases the supply．
B．It increase the supply．
C．It has no effect．
D．There is not enough information to tell if the change increases, decreases, or has no effect on the supply of cars．
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汽车推销员是怎样实行价格歧视的？正确利用价格歧视的能力是怎样影响他或她的收入的？How does a car salesperson practice price discrimination？ How does the ability to discriminate correctly affect his or her earnings？
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You have a Level 1-only router （Router A) in IS-IS area 49.0001.How does Router A learn how to reach prefixes in other areas？（）
A. Router A must have a Level 2 adjacency with the Level 1/Level 2 router in area 49.0001.
B. The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 2 LSP it floods into area 49.0001.
C. The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 1 link-state PDU (LSP) it floods into area 49.0001.
D. The Level 1/Level 2 router in area 49.0001 advertises these prefixes into area 49.0001 using a Level 2 LSP it floods into the area.
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How much living space does a person need？ What hap...
How much living space does a person need？ What happens when his space requirements are not adequately met？ Sociologists and psychologists are conducting experiments on rats to try to determine the effect of overcrowded conditions on man. Recent studies have shown that the behavior. of rats is greatly affected by space. If rats have adequate living space, they eat well, sleep well, and reproduce well.
However, if their living conditions become too crowded, their behavior. patterns and even their health perceptibly change. They cannot sleep or eat well, and signs of fear and tension become obvious. The more crowded they are, the more they tend to bite each other and even kill each other. Thus for rats, population and violence are directly related. Is this a natural law for human society as well？ Is adequate space not only desirable, but also essential for human survival？
This passage is mainly about ______.
A.living space and behavior
B.population and living conditions
C.interesting experiments on rats
D.a natural law for human society
What is the purpose of the experiments described in the passage？A.To determine how much living space a rat needs.
B.To see what happens when rats live in a limited space.
C.To know the likely effects of inadequate living space on human beings.
D.To find out the relationship between population and living conditions.
How would rats behave when their living conditions become too crowded？A.They eat a lot and become friendly to others.
B.They sleep little and act quite peacefully.
C.They eat little but sleep soundly.
D.They become nervous and tend to be war-like.
The passage suggests that overcrowded conditions ______.A.are directly related with population
B.may cause an increase in violence
C.may lead to high birth rate
D.may bring about pollution problems
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—How much does the flat cost a month？—--It’s on the tenth floor.（)
是
否
