1 In the diagram below, a train of waves is moving along

第 13 讲图表类作文解题指导图表类作文一般是在图、表中给出必定的内容和情形，要求考生依据图表信息，正确、客观地反应图表内容，并加以剖析，从而得出结论，旨在考察学生从图表中获守信息并转变成文字信息的能力。

需注意以下几点：1.仔细研读图表。

认清图表中的数字、线条、暗影等部分的变化趋向和走向，抓住其主要特色，依据图表所显示的中心信息确立主题、内容层次以及主题句。

2.确立主题段落。

剖析重组信息，依据信息的不一样性质确立详细段落，列出各段的主题句。

对所给信息的表述要采纳不一样的表达方法，即便用不一样的词汇、短语、句式等。

3.深入论述主题。

末段往常用于深入主题，对全文进行总结，发布个人看法。

结论必定要客观，不行妄加评判。

实战操练( 一 )Since 2014 ，the goal of building a“nation of readers” has been includedin the annual Report on the Work of the Government.Just ahead of World Book Day，the Chinese Academy of Press and Publication has issued its findings in a survey of Chinese reading habits.Chinese people read on average about eight books inthe year 2015，a slight increase compared with that in the previous years.However， things are quite different among teenagers.Below is a chart whichshows the number of books read by Chinese under age 17 in the years of 2014 and2015 respectively(分别地).写作内容1.用约 30 个单词概括上述文字及图表的主要内容；2.联合上述信息，用约 120 个单词简要剖析可能致使青少年图书阅读量降落的原由；3. 联合自己实质，就怎样提升青少年的图书阅读量提几点建议。

第一部分阅读（共两节，满分50分）第一节（共15小题；每小题2.5分，满分37.5分）阅读下列短文，从每题所给的A 、B 、C 、D 四个选项中选出最佳选项。

AVisiting the Metropolitan Museum of ArtAddress1000Fifth Avenue,New York,NY 10028Hours Sunday —Tuesday and Thursday:10am —5pmFriday and Saturday:10am —9pmWednesday:ClosedGeneral admission prices $25for adults;$17for seniors;$12for students.Free for members and children under 12.Three membership possibilities*$110per year:membership for one adult and free admission for one guest per visit.*$210per year:membership for two adults and free admission for two guests per visit.*$600per year:membership for two adults and free admission for four guests per visit.Join today and take a free guest or free guests on every visit,and enjoy special accessto new exhibitions,discounts on shopping,and so on.Group visits Advance reservations are required for all adult and student groups of 10or more,andfor any third⁃party guided tour,regardless of size.In addition,we ask that all groups visiting the museum follow the guidelines below:*Membership and other discounts do not apply to group admission.*All individuals lecturing in the galleries must make a request for a lecture badge (徽章).A lecture badge is only available to groups that have made a reservation in advance.*The staff of the museum lecturing in the galleries have the right to be given attention2023年高考信息卷2本刊试题研究中心Crazy English2023.5first.Please give way to tours and programs led by the museum.*Lecturing is not allowed in special exhibitions.If you have questions,please contact us at **********************.1.When can a person visit the Metropolitan Museum of Art normally?A.At 3pm on Monday. B.At 9am on Friday.C.At 10am on Wednesday.D.At 8pm on Tuesday.2.How much will a non⁃member couple with their 11⁃year⁃old son pay?A.$67.B.$50.C.$25.D.$37.3.Which guideline should group visits follow?A.Lecturing is allowed in any exhibition.B.Membership applies to group admission.C.A lecture badge is available to all groups.D.Any third⁃party guided tour should book in advance.B The National Geographic magazine described one of the wonders of the earth,the tiny silver ants in the Sahara desert.These ants live in areas where temperatures reach up to 57℃,as the article described it,an environment “where shoes melt ”.These tiny ants are amazing.In the Sahara desert,where most creatures avoid going out in the middle of the day to avoid high temperatures,the Saharan silver ants have evolved (进化)a lot of adaptation to do just that.Scientists have discovered that several unique features of the Saharan silver ants permit them to grow well in a scorching climate.These ants have longer legs than other ants,which keep their bodies critically greater distance away from the hot desert sand.The ants run 108times the length of their own bodies every second at a speed of just over 3kph.And they keep track of the position of the sun,so that they always know the most direct route back to the nest,thus lowering their time spent in extreme heat.Their bodies produce protein that resists heat.Some other creatures produce such protein after they come in contact with extreme heat.But since the silver ants only exit the nest for a few minutes at a time —not long enough for the protein to take effect —they produce the protein while still in the nest before they go out,or they would die before the protein could take effect.64Researchers have also discovered that the ants tops and sides are covered with a uniquely triangular(三角的)shape of the silver hairs,which enable them to dissipate(消散)heat.The hairs help an ant s body exchange its heat to a cooler area,even under full sun conditions.This discovery inspired the scientists,for it could lead to new materials and paints that can be applied to rooftops or cars to keep them cool.And it is also expected to be applied in clinical care,wearable devices,protective clothing and other fields.4.What does the underlined word“scorching”in paragraph2mean?A.Extremely chilly.B.Extremely cool.C.Extremely mild.D.Extremely hot.5.What can be inferred about the Saharan silver ants from the text?A.Their hairs act like a tiny air⁃heating system.B.They are born with the ability to track the moon.C.Their adaptation to the desert is to be discovered.D.They can bring more inspiration for more new inventions.6.When do the Saharan silver ants produce the protein that resists heat?A.After coming in contact with extreme heat.B.Before traveling in the sun.C.While running under full sun conditions.D.After coming back to the nest from outside.7.What would be the best title for the text?A.Small ants make a big differenceB.Small ants hunt for food easilyC.Small ants survive in the Sahara desertD.Small ants run the fastest in the worldCSearch and Rescue(SAR)teams are often accompanied by man s best friend.A rescue dog s superior sense of smell can be critical to finding survivors among rubble(瓦砾)and earthquake ruins.But now a new furry animal is joining the ranks of SAR,and it s the rat.Newsweek reports that rats are being trained to assist Search and Rescue teams after an earthquake hits.The rats are fitted with tiny backpacks equipped with microphones andCrazy English2023.5are being sent through ruins to find and come in contact with survivors.These rescue rats are being trained by Dr Donna Kean,a researcher from Glasgow,Scotland who has been working with rats for years.Kean originally was interested in primates (灵长类)but her fascination with rats grew when she saw how quickly the small animals seemed to learn and how well they could be trained.The rats first started their training in a small empty room and gradually moved on to increasingly complex situations until they came close to an actual collapsed building site.That s where humans find the survivors and the potential to talk to the victims through the backpacks fitted to the rats.Today,Kean is training 170rats alongside non⁃profit organization APOPO in Tanzania,East Africa for their project called HeroRATs.Their rats are not only being trained to search through the ruins,but also to find landmines (地雷)and even detect tuberculosis (结核病).APOPO s studies found that their rats have sped up the process for humans to help people in terrible situations.According to Newsweek ,the backpack is made by one of their employees in APOPO,a needlewoman and is made to hold a microphone as well as location trackers.The rats are the real heroes though.As Kean puts it,“They are so smart and they are so good at moving through all kinds of different environments.”“We have the potential to speak to victims through the microphone,”she continues,knowing these little rats are on their way to making a big difference.8.Why is a rescue dog mentioned at the beginning of the text?A.To compare dogs with rats.B.To draw public attention to dogs.C.To introduce the potential of rats.D.To indicate animals unique skills.9.What inspired Kean to train rats for SAR teams?A.The danger of rescue. B.The rats intelligence.C.Her interest in primates.D.Her teamwork with APOPO.10.What can we learn from the HeroRATs project?A.Rats are brave to face a real⁃life disaster.66B.Rats can be easily trained to find survivors.C.Rats are often sent to work in disaster areas.D.Rats can probably help people in various ways.11.What is the main idea of the last paragraph?A.Rats are perfect for SAR work.B.The microphone is a key facility.C.The backpack is a hand⁃made tool.D.Rats are to replace other rescue animals.DHave you ever suddenly developed an appetite from a passing glance at a freeway billboard featuring a brightly colored cheeseburger,or decided to step into a candy or ice cream store displaying a window full of lively shades and hues(色调)of sweet treats?If so, you are in good company.Unless we are medically restricted or strictly dieting,we are not likely to resist inviting fare simply because we recognize the lack of nutritional value. Devina Wadhera and Elizabeth D.Capaldi⁃Phillips in A Review of Visual Cues Associated with Food recognize the impact of sensory cues(信号)on food consumption and enjoyment,and the potential they have to promote healthy eating behavior.They cite previous research to provide some interesting examples of the visual impact of different color schemes(方案)on taste and food enjoyment.They note that pink food on a white plate was considered sweeter and more flavorful than the same food on a black plate. Apparently,we consume more of our senses than we realize.So given the rainbow of colors around us when we are faced with so many appealing food choices,is there any way to control our appetite?Thankfully,some research says yes.Oliver Genschow demonstrated that when it comes to eating less,colors impact consumption.They specifically researched the effect of the color red.They found that people ate fewer pretzels when using a red plate,as opposed to white or blue,and drank less with a red cup than a blue cup.They suggest that the color red reduces food and drink intake by functioning as a stop signal.But when it comes to healthy eating,instead of putting on a pair of sunglasses to block the inviting hues of the food,consider the value of discipline.Healthy eating involvesCrazy English 2023.5intentional choices,not mindless responses to sensory cues.And before you invest in much red tableware to slim down,remember that what goes onto those plates is much more important.12.What may be a major reason for us to refuse eye⁃catching foods?A.The shortage of nutrition. B.The rich color of fine foods.C.The doctor s instructions.D.Advertisements everywhere.13.What might be dealt with in A Review of Visual Cues Associated with Food ?A.Benefits of different color schemes.B.Interesting examples of food service.C.Potential to promote food consumption.D.Effects of sensory cues on eating behavior.14.What does the author suggest people do in the last paragraph?A.Follow the sensory responses.B.Make food choices sensibly.C.Wear sunglasses to block colors.D.Avoid colorful food intentionally.15.What is the best title for the text?A.How people can control their appetite B.How people are tricked by color schemes C.How colors impact food appeal and appetiteD.How bright colors make food more appealing 第二节（共5小题；每小题2.5分，满分12.5分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

User ManualCAUTION: Please read these important safety instructions carefully Read Instructions–All the safety and operating instructions should be read before the unit is operated.Retain Instructions–The safety and operating instructions should be retained for future reference.Heed Warnings–All warnings on the unit and in the operating instructions should be adhered to.Follow Instructions–All operating and use instructions should be followed.Cleaning–Unplug the unit from the wall outlet before cleaning. The unit should be cleaned only as recommended by the manufacturer.Attachments–Only use attachments recommended by the manufacturer asnon-recommended attachments may cause hazards.Water and Moisture–Do not use the unit near water–for example, near a bath tub, wash bowl, kitchen sink, or laundry tub; in a wet basement; or near a swimming pool.Accessories–Do not place the unit on an unstable surface, stand, tripod, bracket, or table. The unit may fall, causing serious injury to yourself or others, and serious damage to the unit.Ventilation–Do not place in a location or position that will interfere with the unit’s ventilation.Do not operate on a bed, sofa, rug, or other similar surface.Power Sources–The unit should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supplied to yourhome, consult your unit dealer or local power company.Power-Cord Protection–Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords where they enter a plug, or exit from the unit.Lightning–For added protection for the unit during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect from other devices. This will prevent damage to the unit due to lightning and power-line surges.Overloading–Do not overload wall outlets, extension cords, or integral convenience receptacles as this can result in a risk of fire or electric shock.Object and Liquid Entry–Never push objects of any kind into the unit through openings as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the unit.Servicing–Do not attempt to service the unit yourself as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.Damage Requiring Service–Unplug the unit from the wall outlet and refer servicing to service qualified personnel under the following conditions:When the power-supply cord or plug is damaged,If liquid has been spilled, or objects have fallen into the unit,If the unit has been exposed to rain or water,If the unit does not operate normally by following the operating instructions,If the unit has been dropped or damaged in any way, and great care should beexercised in handling, and the unit should be examined by qualified service personnel. When the unit exhibits a distinct change in performance– this indicates a need for service.Replacement Parts–When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards.Heat–The unit should be situated away from heat sources such as radiators, heat registers, stoves, or other units (including amplifiers) that produce heat.User ManualOTONE Audio Stilo 2.1 Pro Multimedia SpeakerIntroductionThank you for purchasing Otone Audio’s Stilo 5.1 Multimedia speaker. Your new audio system combines great audio performance and user-friendly operation with cutting edge style. Whether used with your PC or another audio system, Otone’s 5.1 Multimedia speaker will enhance your listening experience.We are committed to creating innovative audio products to meet your home and desktop needs. To get the most from your new system, please be sure to read this User Manual completely. It contains all of the necessary information to connect and operate your system for maximum performance.SpecificationsPower Input: 220v 50/60HzTotal RMS power output: 165W (5 x 20W + 65W)Frequency Response: 70 Hz - 20 KHz (-10dB)Signal to Noise Ratio: >75dBSatellites drivers: 2 x 2” high-sensitivity full-range speakersSubwoofer: 5¼” long-excursion driverAudio Input: 3.5mm six channel direct audio jacks, 3.5mm stereo jackPower Supply: ACDimensions: Sat 253 x 65 x 106mm; Sub 257 x 245 x 255mmWeight: 6.1kgPackage ContentsRemove all of the components and accessories from the carton. Make sure all of the items listed below are present:If for any reason any of the items are missing or damaged, please contact Otone Audio Ltd. Service & Support, details can be found at: /service_and_support1. Front left speaker2. Front right speaker3. Back right speaker4. Back left speaker5. Center speaker (remote receiver)6. Overweight Subwoofer7. AC power cord8. Infrared remote control9. 3.5mm audio signal wire10. Status LED■ Subwoofer ■ An infrared remote control ■ Front satellites x2 ■ User's manual■ Rear satellites x2 ■ Warranty card■ Centre satellite ■ 3.5mm stereo cable x3InstructionsImportant Notice: For safety reasons, please ensure the power is off on the system before beginning set-up.1. All cables should be connected to the subwoofer but first ensure that they are positioned correctly. Remove the speakers from the packaging and place the front satellites either side of the computer or in a suitable position on your desktop or table if using an alternative audioGetting StartedSet Upsource. The centre speaker should be positioned equidistant between the two front satellites.The rear satellites should be positioned behind you, ideally at ear level and adjust the position of the speakers to best direct the sound towards you. For best 5.1 surround sound set upplease refer to the diagram below:To get the best sound ensure that the subwoofer is placed on the floor and that there is adequate ventilation around all speakers. Avoid moisture and other adverse factors which can affect the sound quality.2. The satellite speakers are connected by color-coded RCA jacks. The plug jacks on the end of the speaker cables connect into the corresponding socket jacks on the back of the subwoofer unit. Connect the red plug from the right hand satellite speaker into the red socket on the back of subwoofer then repeat for the white plug from the left hand speaker.Take care when connecting and positioning the front and rear satellites. The rear satellites have longer length cables (to help position them around the room) and should be connected into the sockets marked “Rear Out”.TroubleshootingOnly one of the speakers is working what should I do?First make sure the 3.5mm stereo cable is properly connected, if it still does not work then try to switch to an alternative source e.g. CD or MP3 player. Also check that the both satellite speakers are connected via the RCA lead.Surround sound on /off 3. Next plug in the center speaker into the back of the subwoofer. The socket on the subwoofer is marked "Centre Out". Note: Before inserting the plug ensure the pins are correctly aligned.4. There are now two options to connect to your audio source:a. If you have a 5.1 channel PC or other audio source, connect using all three 3.5mm audio cables supplied. There are individual cables for front, rear and subwoofer/centre channels. Colour-coded 3.5mm jacks connect each channel. The plug jacks connect into the corresponding socket jacks on the back of the subwoofer unit. Connect the orange plug for the front channel to the orange socket on the back of subwoofer then repeat for the green plug (rear channel) and pink plug (subwoofer/center channel).b. If your audio source only has stereo output you should connect using a single 3.5 mm stereo cable. Plug one end of the cable into the black subwoofer socket marked "Line In (stereo)" and the other end into your computer or other audio source’s output jack.5. Once all cable connections are complete, insert the mains plug into the mains socket on the wall. Finally switch on the mains socket, press play on your audio/visual source and enjoy great sound!Remote Control FuctionSounds only comes out of one side when playing a CD through a computerSpeaker sound quality issuesOtone 2.1 speakers will give you excellent sound quality, if you find any unusual sound, please check to see if the audio cable connectors are oxidized, or speaker cable terminals are loose.If you have any questionsPlease visit our website /service_and_support******************************************************.ukNote1. The system should not be placed in hot, humid environment should not beexposed to rain or subjected to strong impact.2. There are no customer-serviceable parts in this product, to prevent electric shock and other accidents do not try to service this product yourself. Refer all servicing to qualified service personnel.3. If you accidentally spill liquid on or in any part of the speaker, you should immediately switch off the power and then arrange for it to be checked by qualified service personnel before you use it again.4. When connecting the system to a source with a large signal volume, do not set the input on the source to maximum, it should be set to the level where no distortion can be detected.5. If you are not going to use your speaker for an extended period of time always switch off the power at the mains power socket.7This can often occur in a new set-up of a computer. You can sometimes find this problem when playing a CD, although a .WAV sound file will play normally. This is because the CD-ROM and sound card have not been correctly configured. Please consult your computer user manual for instructions of how to correctly configure your sound card.No sound1 . Check the power cord is plugged in to the wall power socket and the power socket is switched on.2 . Check all audio cables are connected properly.Background hiss or buzzingCheck that your audio source volume is not set at 100% as this can cause distortion. Set the volume to between 70-75% and use the volume control on your speaker system as the master volume control.Background hiss or buzzingCheck that your audio source volume is not set at 100% as this can cause distortion. Set the volume to between 70-75% and use the volume control on your speaker system as the master volume control.。

March 213)September 23June 214)December 21he diagram below represents four positions of the Earth as it revolves around the Sun.At which position is the Earth located on December 21?1)A3)C2)B4)D3. W hich location on the Earth would the Sun's vertical raysstrike on December 21?1)Tropic of Cancer (2312º N)2)Equator (0º)3)Tropic of Capricorn (2312º S)4)South Pole (90º S)4. W hich observation is a direct result of the 23½º tilt ofEarth's axis as Earth orbits the Sun?Which statement best explains the cause of this apparent change in the Sun's path?1)The Sun's orbital velocity changes as it revolvesaround the Earth.2)The Earth's orbital velocity changes as it revolvesaround the Sun.3)The Earth's axis is tilted 23¡º4)The Sun's axis is tilted 23¡º7. W hich diagram shows the position of the Earth relative tothe Sun's rays during a winter day in the NorthernHemisphere?1)3)2)4)n which day of the year does Connecticut have the fewest hours of daylight?April 21October 21June 21December 21HINTHINT?HINT?HINTHINTHINTW hich motion causes the apparent rising and setting of theMoon each day, as seen from a location in Kansas?1)the Earth revolving around the Sun2)the Moon revolving around the Earth 3)the Earth rotating on its axisbelow. The diagram represents the Earth at a position in orbitaround the Sun, the Sun's rays at solar noon, and the direction to Polaris. Letters A throughD represent positions on the Earth'ssurface.W hat is the latitude of positionA ?1)23¡º N3)66¡º NW hich position is receiving the Sun's rays from directlyoverhead at solar noon?1)A 3)C D uring one complete rotation of the Earth on its axis, which position receives the least number of hours of daylight?1)A 3)C 2)B 4)DT he passage of the Moon into Earth's shadow causes a 1)lunar eclipse 3)new Moon 2)solar eclipse 4)full Moonase your answer to the following question on the diagram A through E represent locations on Earth. Arrows represent direction of rotation.Which location has the longest duration of insolation on December 21?1)A 3)C below, which shows the apparent paths of the Sun at thebeginning of each season for an observer at a location in Connecticut.What is the time interval from the Sun's apparent path A tothe Sun's apparent path C ?1) 1 day 3) 6 months 2) 1 month 4)12 monthsBase your answers to questions 17 and 18 on the chart below, which shows phases of the Moon as viewed by an observer on Earth during 1996.1) 1.74 × 103 km 2) 6.96 × 105 km3) 3.48 × 103 km4) 7.35 × 1022 kmThe diagram below represents a plastic hemisphere upon which lines have been drawn to show the apparent paths of the Sun at a location in New York State on the first day of each season. Letters A through I represent points on the paths.Which point represents the sunrise location on the first day of winter?When viewed from the Earth, which phase of the Moonwill be seen when the Moon is at point E?1)first quarter3)new moon2)full moon4)last quarter22. W hich object orbits Earth in both the Earth-centered(geocentric) and Sun-centered (heliocentric) models of our solar system?1)the Moon3)Venus2)the Sun4)Polaris23. T he same side of the Moon always faces Earth because the1)Moon’s period of rotation is longer than its period ofrevolution around Earth2)Moon’s period of rotation is shorter than its period ofrevolution around Earth3)Moon rotates once as it completes one revolutionaround Earth4)Moon does not rotate as it completes one revolutionaround Earth24. W hy do stars appear to move through the night sky at therate of 15 degrees per hour?1)The Earth actually moves around the Sun at a rate of Which phase could have been observed on August 17?1)3)2)4)ost scientists believe the Milky Way Galaxy isspherical in shape4.6 billion years oldcomposed of stars revolving around Earthone of billions of galaxies in the universeHINTHINTHintHINTBase your answer to the following question on the diagram below, which represents a model of the Earth-Moon system as viewed fromabove the North Pole. The numbers 1 through 8 represent positions of the Moon as it revolves around Earth. The parts of the diagramlettered A through D show how the Moon's phases appear to an observer in New Jersey.Which motion causes the Moon to show phases when viewed from Earth?1) rotation of Earth 2) revolution of Earth 3) rotation of the Moon4) revolution of the MoonBase your answers to questions 30 through 32 on the diagram below, which represents the Moon orbiting Earth as viewed from space above theNorth Pole. The Moon is shown at eight different positions in its orbit.1) decreases, only2) increases, only 3) decreases, then increases4) increases, then decreases1) Foucault pendulum 2) seismograph3) thermometer4) wind vaneThe diagram below shows the relative positions of the Sun, the Moon, and Earth when an eclipse was observed from Earth. PositionsA andB are locations on Earth’s surface.Which statement correctly describes the type of eclipse that was occurring and the position on Earth where this eclipse was observed?1) A lunar eclipse was observed from position A .3) A solar eclipse was observed from position A.2) A lunar eclipse was observed from position B.4) A solar eclipse was observed from position B.At which two positions of the Moon is an eclipse of the Sun or Moon possible?1) 1 and 52) 2 and 63) 3 and 74) 4 and 8Base your answers to questions 35 and 36 on the graph below. The graph shows the recorded change in water level (ocean tides) at a coastal cityin the northeastern United States during 1 day.1) The hourly rate of tidal change is always the same.3) The tidal change is a random event.1) 12:30 a.m.2) 2:00 a.m.3) 3:15 a.m.4) 4:00 a.m.Base your answers to questions 37 and 38 on the world map below, which shows regions of Earth where a solar eclipse was visible on May 20, 1947. Location A, B, C, and Dare on Earth's surface.1) A total eclipse was visible all day.3) A partial eclipse was visible only from noon until sunset.(E),the Sun, and the Moon that created the solar eclipse? (Diagrams are not drawn to scale.)1)3)2)4)The diagrams below represent Earth’s ocean tides at fourdifferent positions of the Moon. Which diagram shows theMoon position that will produce the highest high tides andthe lowest low tides? (The diagrams are not drawn to scale.)1)2)3)4)hich sequence of Moon phases could be observed from1)2)3)4)。

True to the MusicUser GuideUSB-PRO USB Direct Box ™Radial Engineering Ltd.1845 Kingsway Ave., Port Coquitlam, BC V3C 1S9, Canadatel: 604-942-1001 • fax: 604-942-1010******************Radial USB-PRO USB to Audio Direct Box™®Table of Contents PageOverview (1)Features (2)Getting started and audio connections (3)Testing and Using (4)Eliminating hum and buzz (4)Using the headphone output (5)Specifications (5)Radial Limited Warranty ...................................Back CoverINTRODUCTION Congratulations on your purchase of the Radial USB-Pro!The Radial USB-Pro is a high-resolution stereo direct boxdesigned to convert sound files from a laptop computerand seamlessly transfer them to a pair of balanced audiooutputs to feed a PA, recording or broadcast mixingconsole.Plug and play easy to use, the USB-Pro can be up andrunning in no time. That said, as with any new product, werecommend that you take a little time to read through themanual in order to familiarize yourself with the USB-Profeatures so you can get the most out of it.If you have any questions that are not covered in thismanual, please consult the FAQ section on the web siteas this is where we post the latest updates and questionsfrom other users. If you still can’t find what you are lookingfor,********************************************we will do our very best to reply in short order.OVERVIEW The Radial USB-Pro is a plug and play, 24bit digital to analog audio converter and professional direct box in a compact and road rugged package.A typical direct box is a device that lets you interface a high impedance (hi-Z) audio output with professional low impedance (low-Z) PA and recording systems. In the case of the USB-Pro, the digital audio signal is controverted to analog and feeds directly into the direct box circuit to produce low-Z balanced left and right stereo signals. The built in preamp allows you to adjust the output level from mic-level to line-level and enables the USB-Pro to connect directly to mixing consoles, power amplifiers and self-powered speakers alike. The USB-Pro ensures thedigital signal is delivered to the PA as faithfully as possible.MAC or PC PA SYSTEMUSB-Pro The USB-Pro is very easy to setup and use because it derives power from the USB connection and automatically configures the sampling rate and bit depth without the need for special drivers. The USB-Pro can be used for audio playback, system testing and for transferring digital audio files to analog for processing.Following the block diagram below, a computer’s USB digital audio output is converted to analog audio. A level control allows you to adjust the output level and a mono sum switch can be activated to send mono signals to two separate audio systems or check for phase issues. The 3.5mm mini-headphone output can be used to monitor the stereo signal. Before the XLR output, isolation transformers may be switched into the circuit to eliminate noise caused by ground loops. The signal is then balanced to drive long cables without inducing noise. LAPTOPFEATURE SET1. LEVEL: Used to set the overall output level.2. MONO: Sums the stereo signal to mono. When active, the LEDindicator illuminates. Mono mode reduces the channel count on the PA or lets you send the signal to two separate audio systems simultaneously.3. HEADPHONE: Mini 3.5mm (1/8") TRS headphone output is used tocheck the output from the digital source for trouble shooting. Works with ear-buds and standard headphones.4. USB PORT : Connects from the PC or Mac using a TYPE B cable. Thisport delivers the digital audio signal and power to the USB-Pro which automatically recognizes the sample rate and bit depth.5. POWER LED: This indicator will illuminate when the power is receivedfrom the USB connection.6. LEFT XLR OUT : Standard XLR male output follows the AES formatwith pin-1 ground, pin-2 hot, pin-3 cold.7. GROUND LIFT : Used to help eliminate hum and buzz caused byground loops. Lifts pin-1 on both XLR outputs.8. RIGHT XLR OUT : Standard XLR male output follows the AES formatwith pin-1 ground, pin-2 hot, pin-3 cold.9. ISOLATION: Switches on side panel for each channel lets you inserttransformer isolation when needed. Use to eliminate hum and buzz caused by ground loops.GETTING STARTED Before making any connections, always ensure your audio system is either turned down or turned off in order to protect more sensitive components from damage due to loud turn-on or plug-in transients. USB CONNECTION As the USB-Pro uses a TYPE B USB connector, you will need a USB 2.0 cable that fits the USB port on your computer or laptop. This is a common ‘TYPE A to TYPE B’ USB cable that is compatible with the majorityof printers, hard drives and audio interfaces.TYPE A USB Fits most laptops and computers TYPE B USBUsed to connect to the USB-ProThe Radial USB-Pro is powered by your computer’s USB port. As soon as you plug it in the USB-Pro will power up. The POWER LED indicator will illuminate to let you know the USB-Prois up and running. On most computers theUSB-Pro will automatically become thedefault audio output device after it is pluggedin. If this does not happen automatically, goto your system settings/control panel andselect the ‘Radial USB Pro’ from the list ofavailable audio devices.AUDIO CONNECTIONS Connect two standard low-impedance XLR cables from the LEFT and RIGHT outputs to the mic or line inputs of your PA or recording system. These XLR outputs conform to the AES standard and are balanced to drive long cable runs up to 100 meters (300') without noise and are suitable to connect the USB-Pro to professional mixing consoles, preamps and power amplifiers.balanced XLR cables up to 100 meters (300').IMPORTANT NOTICE: The USB-Pro does not require phantom power to operate. For best results ensure the phantom power is switched off when connecting to the microphone input of a mixer. In case of use with a mixer with global phantom power that is activated, the isolation/bypass switches on the USB-Pro are to be set to the isolation position.LED Power IndicatorTESTING AND USING First, set the USB-Pro’s LEVEL control tothe 7 o’clock (off) position. This will allowyou to adjust the output level on the fly.Next, check the status of the MONO SUMswitch and LED indicator. For stereo, setthe switch to the outward position (LEDoff). For dual mono outputs, set the switchto the inward position (LED on). It’s a good idea to start testing your computer’s audio with a sound file you are familiar with. Set your computers output level and the level of the media playback software (if applicable) to approximately 80%. Keep in mind that various media files will play back at different volume levels depending on your software and how the sound file was recorded.Slowly raise the output level of the USB-Pro. It is good practice to always test at a low volume to ensure proper connections have been made and all devices in the signal chain are set up correctly and working. This way, should a device not be turned on or a connection not fully made, it will not create a loud transient ‘pop’ in the PA which could damage a tweeter or annoy your audience. When satisfied, slowly increase the input gain on your mixing console until you reach an appropriate level.In some cases, like when a second audio interface is also connected to your computer alongside the USB-Pro, your computer may not automatically switch to the USB-Pro as the main audio output. In such cases you will need to enter your computer system’s control panel and select the USB-Pro as the audio output device from a list of available devices.ELIMINATING HUM AND BUZZ The USB-Pro has been designed tominimize hum and buzz caused byground loops by incorporating dualisolation transformers for the XLRoutputs. The isolation transformersare normally bypassed but may beintroduced into the signal path using theside access ISO switches. If you hearnoise after connecting the USB-Pro toyour audio system, try engaging theisolation transformers by sliding theswitch in the direction of the arrow.This is supplemented with a ground LIFTswitch located next to the XLR outputs.When set to the inward position, this switchdisconnects pin-1 from the two XLR’s.Left & right transformer isolation switchesGround LiftUSING THE HEADPHONE OUTPUT The USB-Pro is also equipped with a stereoheadphone output. This headphone amplifieris controlled by the master output level control,and is designed to be used to check signalbefore plugging into a PA system. Adjusting thelevel control on the USB Pro will affect both theXLR and the headphone output. The 3.5mm(1/8") output is designed for both ear buds andstandard TRS stereo headphones where tip-left,ring-right and the sleeve is ground. Be Careful , the USB-Pro is designed for professional use as the headphone amp is very powerful and is capable of high sound levels when driven to maximum. Always ensure the output level of your computer, laptop or tablet is set at an appropriate level before auditioning music through headphones. This will not only save your ears, but save the ears of your client! See caution note on the back page.Audio circuit type: .................................................DAC with balanced outputs Compatible with: ..............Windows XP/Vista/Win7/Win8/Win10 and Mac OS Supports: ............WDM, MME, CoreAudio, DirectSound, WASAPI and .WAV Sampling rates: ...............Set by computer OS 44.1/48/88.2/96kHz; 16/24bits Frequency response: ....................5Hz - 40kHz (30Hz - 18kHz with isolation)Total harmonic distortion: .....................................................................<0.01%Dynamic range: .......................................................................................90dB XLR output impedance: ...................................................................250 Ohms Stereo channel separation:.......................................................................75dB XLR configuration: .........................................Pin 1 ground, Pin 2 (+), Pin 3 (-)USB bus power:....................................................................525mA maximum USB connector: ..................................................................Type-B USB input Construction: .....................................14-gauge steel chassis and outer shell Finish: ......................................................................................Powder coating Warranty: ...............................................................Radial 3-year, transferable *Specifications are subject to change without notice.SPECIFICATIONS*BLOCK DIAGRAMTRANSFORMER FULL BYPASS SWITCHESLEFTRIGHT GROUND®THREE YEAR TRANSFERABLE LIMITED WARRANTYRADIAL ENGINEERING LTD. (“Radial”) warrants this product to be free from defects in mate-rial and workmanship and will remedy any such defects free of charge according to the terms of this warranty. Radial will repair or replace (at its option) any defective component(s) of this product (excluding finish and wear and tear on components under normal use) for a period of three (3) years from the original date of purchase. In the event that a particular product is no longer available, Radial reserves the right to replace the product with a similar product of equal or greater value. In the unlikely event that a defect is uncovered, please call 604-942-1001 or *******************************************(ReturnAuthorizationnumber)beforethe 3 year warranty period expires. The product must be returned prepaid in the original shipping container (or equivalent) to Radial or to an authorized Radial repair center and you must as-sume the risk of loss or damage. A copy of the original invoice showing date of purchase and the dealer name must accompany any request for work to be performed under this limited and transferable warranty. This warranty shall not apply if the product has been damaged due to abuse, misuse, misapplication, accident or as a result of service or modification by any other than an authorized Radial repair center.THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HERE-OF AND DESCRIBED ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPEC-TIVE WARRANTY PERIOD DESCRIBED ABOVE OF THREE YEARS. RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE OF THIS PRODUCT . THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH MAY VARY DEPENDING ON WHERE YOU LIVE AND WHERE THE PRODUCT WAS PURCHASED.Radial ® USB-Pro ™ User Guide - Part# R870 1224 00 / 09-2021Specifications and appearance are subject to change without notice.Radial Engineering Ltd.1845 Kingsway Ave., Port Coquitlam, BC V3C 1S9, Canadatel: 604-942-1001 • fax: 604-942-1010 ******************T o meet the requirements of California Proposition 65, it is our responsibility to inform you of the following: WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.Please take proper care when handling and consult local government regulations before discarding.。

2021年全国计算机等级考试四级模拟试题及答案7(61) There are several periods in a computer，the shortest period isA．Instruction periodB．Machine periodC．Beat periodD．CPU period </P><P>(62) Which set is empty?A．｛xx is a real number and x2=9 B)｛xx is a real number and x2-1=0｝C)｛xx is a real number and x2+1=0｝ D)｛xx is a real number and x=2x+1｝ </P><P>(63) What is the relation represented in the exhibit shown below?A．R={(1,2),(1,3),(1,4),(1,5)}B．R={(1,1),(2,2),(3,3),(4,4),(5,5)}C．R={(1,2),(1,3),(1,4),(2,3),(4,1),(4,5),(5,5)}D．R={(1,2),(1,3),(1,4),(2,2),(2,3),(4,1),(4,4),(4,5)}</P><P>(64) What is the contrapositive of the following implication?“If it is raining，then I get wet.”A．If I get wet，then it is raining.B．If I am wet ，then if is raining.C．If it is not raining, I do not get wet.D．If I do not get wet，then it is not raining. </P><P>(65) Which property does R posses? (2 grades)Let A={1,2,3,4} and let R ={<1 2="">,<2 2="">,<3 4="">,<4 1="">}A．SymmetryB．ReflexivityC．AsymmetryD．Antisymmetry </P><P>(66) When walking a tree, which traversal method yieldsa prefix, or Polish,form?A．lnorderB．PreorderC．PostorderD．Reorder</P><P>(67) ln the following statements about graph operations, which one is NOT correct?(2 grades)A．Spanning tree of a graph may not be unique.B．Minimum spanning tree of a graph may not be unique. C．Finding critical path is an operation on directed graph. D．Finding critical path is an operation on undirected graph. </P><P>(68) Which traversal method for a binary tree does the following Pascal code illustrate? (2 grades)procedure traverse(p:pointer);beginif p<>nilthen begintraverse(p↑.left);process(p);traverse(p↑.right)endend;A．lnorderB．PreorderC．PostorderD．Reorder </P><P>(69) What storage scheme does MS-DOS use for storing files on a disk?A．I-nodesB．a linked list allocationC．a continuous allocationD．a linked list with index </P><P>(70) Which of the followings is NOT a condition for deadlock?A．StarvationB．Circular WaitC．No PreemptionD．Mutual Exclusion </P><P>(71) Assume that an operating system uses a round-robin scheduler. The process’s quantum is 20 msec,and the context switch is 5 msec. What percentage of the CPU’s time is spent on administrative overhead? (2 grades) A．5％B．15％C．20％D．25％ </P><P>(72) What state is a process in when it can’t run because it needs a resource to become available? (2 grades) A．ReadyB．InterruptC．BlockedD．Running </P><P>(73) The following sectors are requested from the disk: 11,1,36,16,34,9,12What is the order of the sector reads if you are using the elevator algorithm?(2 grades)A．1,9,11,12,16,34,36B．11,1,36,16,34,9,12C．11,12,9,16,1,34,36D．11,12,16,34,36,9,1 </P><P>(74) What is the candidate key of a relational database?A．A field with a constraint placed on it.B．A set of fields that have no data in them.C．A set of fields in a table used to identify a record uniquely.D．Fields from multiple tables that are used for sorting records. </P><P>(75) What Normal From is the table shown in the exhibit? (2 grades) </P><P> emps tblemp_idemp_nameemp_phonedept_namedept_phonedept_mgrname (1) emp_id→emp_name, emp_phone, dept_name(2) dept_name→dept_phone, dept_mgrnameA．1NFB．2NFC．3NFD．BCNF </P><P></P><P>(76) Which operating system can Oracle database NOT be used in?A．DOSB．UNIXC．Windows95D．IBM Mainframes </P><P>(77) Which values are NOT permitted to be part of the primary key?A．NULLB．punctuationC．special charactersD．alpha-numeric characters </P><P>(78) Which phase of the software engineering process results in the Software Requirements Specification? A．definition phaseB．engineering phaseC．maintenance phaseD．development phase </P><P>(79) When drawing multilevel data flow chart of top-down, the balance between parent chart and son chart must be taken into account, and to pass judgment for the balance of the charts is regularly maintained by (2 grades) A．Output dataB．Data dictionaryC．Processing numberD．Input data </P><P>(80) Which is the strictest form of cohesion? A．logicalB．functionalC．proceduralD．coincidental </P><P>(81) Which is NOT a concept of White Box Testing? (2 grades)A．You should execute all loops at their boundary conditions.B．You should execute all interfaces at their boundary conditions.C．You should execute all logical decisions on their true and false sides.D．You should execute all independent paths within a module at least once. </P><P>(82) Prototyping method is a dynamic design process, it requires people who use prototyping method should have the following capabilityA．Proficient program expertiseB．Immediately acquire requirementC．Coordinate & organize eloquentlyD．Handle tools smartly </P><P>(83) There are two styles in the evolution of instruction set , that is CISC and RISC. Which chip belongsto the RISC?A．i APX 432B．VAX-11/780C．Motorola 68000D．Power PC </P><P>(84) In advanced PC bus or local bus, which one has the fastest data throughput?A．ISAB．PCIC．MCAD．EISA </P><P>(85) There are many methods in the CPETT(short for Computer Performance Evaluation Tools and Techniques). One of them is the method that runs a Kernel as the load of a computer. So we call itA．Monitor methodB．Benchmark methodC．Model methodD．Physical method </P><P>(86) There are two common types in page replacement algorithm: stack and non-stack strategies. When a real pagenumber increase only stack algorithm can increase the hit rate monotonously. In the following replacementalgorithm,which one belongs to non-stack strategy?(2 grades)A．FIFOB．LRUC．PFFD．OPT </P><P>(87) What binary number is encoded with Differential Manchester in the diagram below? (2 grades) A．10110011100B．11001100011C．11000110010D．00111001101 </P><P>(88) Each host or router on the Internet has its own IP address. There are four IP addresses as followings. Which IP address is erronedus?A．189.132.2.1B．255.255.255.0C．198.73.265.50D．192.0.0.3 </P><P>(89) When should Frequency Division Multiplexing be used?A．when the attenuation on a medium is greater than 25％. B．when the white noise on the medium exceeds 50％ of the medium’s bandwidthC．when the achievable data rate of the medium exceeds the data rate of the digital signals to be transmitted D．when the useful bandwidth of the medium exceeds the required bandwidth of the digital signals to be transmited </P><P>(90) The universe of hypertext servers that allow text, graphics, sound, and other multimedia files to be viewed togather and navigated via hypertext links. It is now the fastest growing area of the Internet. It isA．GopherB．WWWC．E-mailD．FTP</P><P>61.B 62.C 63.D 64.D * 65.D66.B * 67.C * 68.A 69.C 70.A* 71.C 72.C * 73.D 74.C * 75.B 76.A 77.A 78.A * 79.B 80.B* 81.B 82.B 83.D 84.B 85.B* 86.A * 87.B 88.C 89.D 90.B。