If several fixed navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?______.A.RhythmB.PeriodC.IntensityD.Color
If several fixed navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?______.
A.Rhythm
B.Period
C.Intensity
D.Color
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●The TCP protocolis a (71) layer protocol. Each connection connects two TCPs that may be just one physical network apart or located on opposite sides ofthe globe. In other words, each connection creates a (72) witha length that may be totally different from another path created by another connection. This means that TCP cannot use the same retransmission time for all connections. Selecting afixed retransnussion time for all connections can result in serious consequences. Ifthe retransmission time does not allow enough time for a (73) to reach the destination and an acknowledgment to reach the source, it can result in retransmission of segments that are still on the way. Conversely, if the retransnussion time is longer than necessary for a short path, it may result in delay for the application programs.Even for one single connection, the retransmission time should not be fixed.A connection may be able to send segments and receive (74)faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection. Retransmission time can be made(75) by basing it on the round-trip time (RTT). Several formulas are used for this purpose.(71) A.physicalB.networkC.transportD.application(72) A.pathB.windowC.responseD.process(73) A.processB.segmentC.programD.user(74) A.connectionsB.requestsC.acknowledgmentsD.datagrams(75) A.longB.shortC.fixedD.dynamic
单句理解听力原文：These time deposits earn higher interest rates, which may be fixed or floating, but no withdrawals are allowed until the term has ended.(1)A．Sometimes the interest rates on time deposits are not fixed.B．People can draw these deposits at any time.C．The interest rates on time deposits are fixed.D．The interest rates on time deposits are floating.
The TCP protocolis a (71) layer protocol. Each connection connects two TCPs that may be just one physical network apart or located on opposite sides ofthe globe. In other words, each connection creates a (72) witha length that may be totally different from another path created by another connection. This means that TCP cannot use the same retransmission time for all connections. Selecting afixed retransnussion time for all connections can result in serious consequences. Ifthe retransmission time does not allow enough time for a (73) to reach the destination and an acknowledgment to reach the source, it can result in retransmission of segments that are still on the way. Conversely, if the retransnussion time is longer than necessary for a short path, it may result in delay for the application programs.Even for one single connection, the retransmission time should not be fixed.A connection may be able to send segments and receive (74)faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection. Retransmission time can be made(75) by basing it on the round-trip time (RTT). Several formulas are used for this purpose.A.physicalB.networkC.transportD.application@@@SXB@@@A.pathB.windowC.responseD.process@@@SXB@@@A.processB.segmentC.programD.user@@@SXB@@@A.connectionsB.requestsC.acknowledgmentsD.datagrams@@@SXB@@@A.longB.shortC.fixedD.dynamic
Ink-jet printer belongs to nonimpact printers in which the characters are formed by projecting particles or droplets of ink on to paper.(71) printer is also a nonimpact printer in which the characters are produced by applying hot elements to heat-sensitive paper directly or by melting ink from a(72) on to plain paper. Electrostatic printer creates an electrostatic latent image, which is then made visible by a toner and transferred and fixed on paper. An electrostatic printer may be used in some instances as a(73). Laser printer creates, by means of a laser beam directed on a(74) surface, a latent image which is then made visible by a toner and transferred and fixed on paper. Magnetographic printer creates, by means of magnetic heads operating on a metallic drum, a latent image which is then made visible by a toner and transferred and fixed on paper. Computer-output-microfilm (COM) printer produces on a photographic film a(75) of each page.A．HotB．WarmC．HeatD．Thermal
An analog signal's characteristic quantity representing data may 66). at any instant, any value within a continuous(67). For example, an analog signal may follow continuously the values of another physical quantity representing data.A discrete signal is composed of(68)elements in time, each element having one or more characteristic quantities which can represent data. Examples of characteristic quantities are amplitude, waveform,(69), and position in time. A digital signal is a special case of discrete signals, in which data are represented by a(70)number of well-defined discrete values that one of its characteristic quantities may take in time.A．acquireB．collectC．assumeD．fetch
Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by ______.A.Notices to MarinersB.Sailing DirectionsC.List of Lights and SignalsD.Guide to Port Entries
A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights ______.A.are not the same color as either side lightB.have a lesser range of visibility than the prescribed lightsC.do not impair the visibility or distinctive character of the prescribed lightsD.All of the above
Even for one single connection, the retransmission time should not be fixed.A connection may be able to send segments and receive （74）faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection. A.connections B.requests C.acknowledgmentsD.datagrams
In other words, each connection creates a （72） witha length that may be totally different from another path created by another connection. This means that TCP cannot use the same retransmission time for all connections. A.path B.window C.response D.process
Retransmission time can be made（75） by basing it on the round-trip time （RTT）. Several formulas are used for this purpose. A.long B.short C.fixed D.dynamic
A customer has 4 POWER6 servers managed by a Hardware Management Console （HMC）. They plan to install a second HMC for redundancy. Which of the following statements correctlydescribes the dual HMC environment？ （）A、 To provide the Service Agent function， both HMCs must have Service Agent enabled and a dedicated modem and phone line.B、 Authorized users must have the same username and password on both HMCs， so that every user of one HMC is automatically authorized on the other.C、 Both HMCs are automatically notified of any changes that occur in the managed systems， so results of changes made to the managed system by one HMC are visible on theD、 Both HMCs must be running the same software revision. Software maintenance must be performed on both HMCs at the same time， but one HMC should be disconnected from
What is the point of using a combiner? （）A、Up to four sites can share one PCM link.B、Several TRXs can share one antenna system.C、The mobile can listen to two base stations at the same time.D、Only one base station is needed per site.E、Sending and transmitting can be performed from the same antenna.
Stream ciphers run on which of the following？（）A、Fixed-length groups of digits called blocksB、Individual blocks，one at a time，with the transformations varying during the encryptionC、Individual digits，one at a time，with the transformations varying during the encryptionD、Fixed-length groups of bits called blocks
跑道边灯应为固定灯具，显示可变的白光。（）A、Runway edge lights shall be fixed lights showing variable white.B、Runway middle lights shall be fixed lights showing variable white.C、Runway edge lights shall be fixed lights showing vary white.D、Taxiway edge lights shall be fixed lights showing variable white.
单选题A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights（）.Aare not the same color as either side lightBhave a lesser range of visibility than the prescribed lightsCdo not impair the visibility or distinctive character of the prescribed lightsDAll of the above
单选题Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by（）.ANotices to MarinersBSailing DirectionsCList of Lights and SignalsDGuide to Port Entries
单选题A vessel is approaching from dead ahead． Both of her sidelights are visible and her range lights are in line. Which of the following could you do first?（）.ASound one blast of the whistleBAlter course to starboardCConstruct a radar plotDSound the danger signal
问答题Cultural Attitudes towards Time According to anthropologist Irving Hallowell, there is no evidence that humans have an inborn sense of time. A person’s temporal concepts are probably determined largely by culture. One study showed that infants, after a few days of listening to speech around them, will move their heads and limbs in rhythm with the speech they hear. As children develop, they adapt more fully to their temporal culture. This temporal culture influences language, music, poetry and dance. It also affects relationships. We tend to get along well with people who share our sense of time. One particular cultural attitude towards time is found in polychronic cultures. Some Mediterranean and southwest Asian Cultures are usually placed in this category. Such cultures emphasise relationships among people, flexible timing of appointments, and the careful completion of processes rather than strict schedules. Polychronic people seldom feel that time is being wasted. They tend to consider each activity valuable on its own, not just as part of a larger process. Polychronic people tend to have many projects going on at the same time, and they may shift frequently from one task to another. They change plans often. For polychronic people, work time is not clearly separable from personal time, so business meetings are considered a form of socialising. Monochronic cultures, on the other hand, are oriented towards tasks and schedules. Cultures usually considered monochromic can be found in northern Europe, North America, and some parts of eastern Asia. Monochronic people feel that time is tangible and inflexible and that “time is money.” They do one thing at a time and concentrate on each thing. Time and job commitments are very important to them and they tend to follow plans rigidly. Also, monochromic people clearly separate their work and personal time, and they place a high value on privacy. As you might expect, people from polychronic and monochromic cultures often misunderstand each other because of their different senses of time. For example, because a monochromic culture is highly compartmentalized, monochromic people tend to sequence conversations as well as tasks. They would not, for instance, interrupt a phone call in order to greet another person who just came into the room In contrast, polychronic people are comfortable with having multiple conversations at the same time. They would consider it rude not to greet someone who entered during a phone conversation. Complete the summary below by choosing for each blank no more than three words from the passage. Cultures may have either a 1 or a monochromic conception of time. Cultures with a polychromic view of time follow a 2 timetable. People from polychronic cultures tend to work on severa 3 at the same time. On the other hand, people in 4 perceive events and tasks as being more compartmentalized. In this culture, jobs and even conversations should follow a certain 5 Everything in these cultures seems inflexible, and has its own place and time.
单选题A vessel constrained by her draft may display（）.Athree all-round red lights instead of the lights required for a power-driven vessel of her classBthe same lights as a vessel restricted in her ability to maneuverCthree all-round red lights in addition to the lights required for a power-driven vessel of her classDthe lights for a power-driven vessel which is not under command
单选题If several fixed navigational lights are visible at the same time，each one may be positively identified by checking all of the following EXCEPT what against the Light List?（）ARhythmBPeriodCIntensityDColor
单选题A compound fracture is a fracture in which（）.Amore than one bone is brokenBthe same bone is broken in more than one placeCthere is never any internal bleedingDthe bone may be visible
单选题Two navigational hazards are located near to each other，but each is marked by an individual cardinal buoyage system. The buoys of one cardinal system may be identified from the other system by（）.Athe differing light colorsBone system having odd numbers while the other system has even numbersCone system using horizontal bands while the other system uses vertical stripesDthe difference in the periods of the light
单选题The ARPA may swap targets when automatically tracking if two targets（）Aare tracked on reciprocal bearingsBare tracked at the same rangeCare tracked on the same bearingDpass closely to each other
单选题On navigational aids，what does the light characteristic Fl(2+1) mean?（）AA flashing light combined with a fixed light of greater brightnessBLight flashes combined in groups，with a different number of flashes in each groupCA light showing groups of two or more flashes at regular intervalsDA fixed light varied at regular intervals by groups of two or more flashes of greater brightness
单选题A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.Acan’t be controlled very preciselyBcan’t be controlled as flexibly as the separate pump systemCcan be controlled as flexibly as the separate pump systemDcan be controlled more precisely and flexibly