Note A Note on Some Flag-Transitive Affine Planes

之阳早格格创做1. Note-taking symbols and abbreviations for your reference: Abbreviations in Note takingUse only the abbreviations that fit your needs and that you will remember easily. A good idea is to introduce only a few abbreviations into your note taking at a time. Symbols helpful in math -- these are commonly used in texts andreferences.S = sumf = frequency Leave out periods in standardabbreviations.cf = comparee.g. = exampledept = depart ment Use only the first syllable of aword.pol = politicsdem = democracylib = liberalcap = capitalism Use entire first syllable and only 1st letter of 2nd syllable.pres = presentationsubj = subjectind = individ ualcons = conservative Eliminate final letters. Use just enough of the word to form a recognizableabbreviation.assoc = associatebiol = biologyinfo = infor mationach = achievementchem = chemistrymax = maxi mumintro = introductionconc = concentrationmin = mi nimumrep = repetition Omit vowels, retain only enough consonants to give a recognizable skeleton of theword.ppd = preparedprblm = problemestmt = estimatebkgd = backgroundgvt = government Use an apostrophe in place ofletters.am't = amountcont'd = continuedgov't = govern menteducat'l = educationalForm the plural of a symbol or abbreviated word by addings.chpts = chaptersegs = examplesfs = frequenciesintros = introductions Use g to represent ingendings.ckg = checkingestg = establishingdecrg = decre asingexptg = experimenting Spell out short words such as in, at, to, but, for, and key. Abbreviations or symbols for short words will make the notes too dense withshorthand. Leave out unimportant words.Leave out the words a and the. If a term, phrase, or name is written out in full during the lecture, substitute initials whenever the term, phrase, or name is used again. For example, Center for Aerospace Sciences becomes CAS thereafter. Use symbols for commonly recurring connective or transitionalwords.& = andw/ = withw/o = withoutvs = against\ = therefore= = is or equal Use technical symbols where applicable.zb = German, for exampleibid = Latin, the same worko = degreesH2O = waterMore reference:Use standard maths, accounting, and science symbols. Examples:+plus// parallelUse standard abbreviations and leave out full stops. Examples:eg exampleIT dept Information Technology departmentUK United KingdomUse only the first syllable of a word. Examples:mar marketingcus customercli clientUse the entire first syllable and the first letter of the second syllable. Examples:subj subjectbudg budgetind individualTo distinguish among various forms of the same word, use the first syllable of the word, an apostrophe, and the ending of the word. Examples:tech'gy technologygen'ion generalisationdel'y deliveryUse just enough of the beginning of a word to form a recognisable abbreviation. Examples:assoc associatedach achievementinfo informationOmit vowels from the middle of words, retaining only enough consonants to provide a recognisable skeleton of the word. Examples:bkgd backgroundmvmt movementprblm problemForm the plural of a symbol or abbreviated word by adding 's.'Examples:custs customersfs frequencies/s ratiosUse 'g' to represent 'ing' endings. Examples:decrg decreasingckg checkingestblg establishingSpell out, rather than abbreviate short words. Examples:inbutaskeyLeave out unimportant verbs. Examples:iswaswereLeave out unnecessary articles. Examples:aantheIf a term, phrase, or name is initially writtenout in full during the talk or meeting, initials can be substituted whenever the term, phrase, or name is used again. Example:January Advertising Campaign Budget JACBUse symbols for common connective or transition words. Examples:@ at2 to4 for& andw/ withw/o withoutvs againstCreate your own set of abbreviations and symbols. You may wish to develop separate sets of symbols and abbreviations for different courses or subjects.Other Symbols and Abbreviationsas a result of / consequences of <--->resulting in --->and / also +equal to / same as =following ffmost importantly *less than <greater than > especially esp/闭于缩略词汇一、缩略词汇英语核心缩略词汇使用的频次很下，如IMP: important, ASAP: as soon as possible.很隐然如果能流利掌握缩略词汇，会对于考查大有裨益.缩略词汇的写法普遍为四种办法：F拿掉所有元音MKT: marketMGR: managerMSG: messageSTD: standardRCV: receiveF死存前几个字母INFO informationINS insuranceEXCH exchangeI owe you IOUIn stead of I/OF死存启头战末端个收音字母WK weekRM roomPL peopleF根据收音R areTHO thoughTHRU through下档心译听力时常使用英语缩略词汇表缩略词汇本词汇APT ApartmentACC AccountantACDG AccordingACPT AcceptAD AdvertisementADS AddressADVAdviceAMAP As much/many as possibleAMT AmountAPV ApproveASAP As soon as possibleBAL BalanceBLDG BuildingCERT CertificateCFM ConformCNCL CancelCNF ConferenceCMI CommissionCMP CompleteCMPE Compete/competitiveCMU CommunicationCONC Concern/concerning/concernedCOND ConditionCO. CompanyDEPT DepartmentDISC DiscountDPT DepartureEXCH ExchangeEXPLN ExplainEXT ExtentFLT FlightFNT FinalFRT FreightFYR For your referenceGD GoodGUAR GuaranteeH.O. Home officeINFO InformationIMPS ImpossibleIMP(T) ImportantINCD IncludeINDIV IndividualINS InsuranceINTST InterestedI/O In stead ofIOU I owe youIVO In view ofMANUF ManufactureMDL ModelMEMO MemorandumMGR MangerMIN MinimumMKT MarketMSG MessageNCRY NecessaryNLT No later thanOBS ObserveOBT ObtainORD OrdinaryPAT PatentPC PiecePKG PackingPL PeoplePLS PleasePOSN PositionPOSS(BL) PossiblePROD ProductQLTY QualityQUTY QuantityRCV ReceiveREF ReferenceREGL RegularREP RepresentativeRESN ReservationRPT RepeatRESPON ResponsibleSEC SectionSITN SituationSTD StandardTEL TelephoneTEMPTemporaryTGM TelegraphTHO ThoughTKS ThanksTRD TradeTRF TrafficTTL TotalU YouUR YourWK WeekWL WillWT WeightXL Extra large闭于字母战图像两、字母、图像Z 表示"人"people/person，果为"Z"瞅上去像部分头，它常常被写正在一个词汇或者标记的左上角.比圆：日自己：JZ.C 表示政府，统制：government，govern 希腊字母C读/ga:ma/,近似government, 所以便用C去表示govern, ernmental official 不妨表示为 CZP 表示政事：politics, political希腊字母P读/pai/,近似politics, political.那么politician便不妨表示为 PZE 表示总数：total, totally, entire, entirely, on the whole, all in all, to sum up, ect. E 数教标记表示总值.G 表示效用：efficient, effective.G 为效用标记.Q 表示"通货伸展"：inflation果为那个标记酷似一个降下的气球.A 表示农业: agriculture. agriculture经时常使用到，所以用尾字母代替.B 表示商业：business.C×表示辩论，冲突：conflict， confrontation "C×"中的"×"表示阻挡于，字母"C"将阻挡于的观念缩小为conflict 战confrontation.W 表示处事，工做: work, employ 等.它是work的第一个字母.所以WZ便不妨用去表示worker, 而W(Z正在字母上圆表示employer, 正在字母下圆表示employee).i 表示工业: industry, industrial 字母i 像只烟囱，所以用去不妨用去表示工业.U U 瞅酷似一个酒杯，正在条记中表示合共、协议（treaty, agreement）普遍惟有正在道判乐成、协议成接后才会表示"举杯祝贺".如果正在U内挖进2××××，便不妨表示为bilateral（单边的）, 挖进3表示为trilateral(三边的).挖进正在U中挖进1表示: Unilateralism （单边主义），挖进m (multiple) 表示多边主义.如果正在U 上加一个"/"××××表示道判破裂.O 表示"国家"、"民族"、"收土"等：country, state, nation, etc.gO表示进心，Og表示出心那个标记酷似一把椅子，不妨表示主持、主办：chair, host, preside over.那么正在此标记上加Z表示主席，主持人：chairman, host, etc.T 表示"收袖人"：leader, head那么head of government, head of company 即不妨表示为 CT⊙圆圈表示一个圆桌，中间一面表示一盆花，那个标记便不妨表示聚会、启会等：meeting，conference， negotiation，seminar，discussion，symposiumk 那个标记瞅上像条鱼，所以表示"挨鱼业"等合fishery 有闭的词汇汇.O 圆圈代表天球，横线表示赤讲，所以那个标记便不妨表示国际的、天下的、寰球的等: international, worldwide, global, universal, etc.J 表示启心：pleasant, joyful，happy，excited, etc.L 表示没有谦、气愤unsatisfied, discomfort, angry, sad, etc.EO 表示听到、总所周之：as we all know, as is known to all, as you have already heard of, etc.O 表示漠没有闭心、漠不体贴：indifferent, apathetic, unconcern, don't care much, etc.用箭头、数教标记、标面标记去表示三、箭头g 表示到达、传达：go into，arrive at，give to，send to，present to etc.表示引导、带收：lead to, result in, in the direction of, etc.表示伸服：submit tof 表示去自于：be/come from，return，receive from, etc.表示逃溯到：come/go back to，originateh 表示降下：up/upward/rise，increase，arise，ascend, etc.表示收射、投搁商场、收止：launch，open, start, etc.表示死少、加强、促成：develop，strengthen， promote, etc表示"挫合"：ups and downs, twists and turns, etc.四、数教标记+ 表示"多": many, lots of, a great deal of, a good many of, etc.++(+2) 表示"多"的比较级：more+3 表示"多"的最下档：most－表示"少": little, few, lack ,in short of/ be in shortage of etc.×表示"过得"、"过得"战"坏"的观念：wrong/incorrect，something bad，notorious，negative, etc.> 表示"多于"观念：bigger/larger/greater/more than/better than, etc.表示"下" 观念：superior to，surpass, etc.< 表示"少于"观念：less/smaller，etc.表示"矮"观念：inferior to，etc.= 表示"共等"观念：means，that is to say， in other words，the same as，be equal to, etc.表示"对于脚"观念：a match, rival, competitor, counterpart, etc.( ) 表示"正在......之间"：among, within, etc.≠ 表示"分歧"观念：be different from, etc.表示"无敌"观念：matchless, peerless, etc.～表示"约莫"观念：about/around，or so， approximately, etc./ 表示"可定"，"取消"等观念：cross out, eliminate, etc.五、标面等: 表示百般百般"道"的动词汇：say, speak, talk, marks, announce, declare, etc.? 表示"问题"：question，issue，比圆：台湾问题：tw?. (dot) 那个"."面的位子分歧表示的观念也纷歧样".d"表示yesterday, ".y"表示last year, ".2m"表示two month ago."y"表示this year, "y2." two year later"next week", 不妨表示为"wk."∧表示转合√ 表示"佳的"状态，right/good，famous/well-known，etc.表示"共意"状态，stand up for，support， agree with sb, certain/ affirmative, etc.☆表示"要害的"状态：important，exemplary（模范的） best，outstanding，brilliant，etc.n 表示"接流"状态：exchange，mutual, etc.& 表示"战"，"取"：and，together with，along with， accompany，along with，further more，etc.∥表示"中断"：end，stop，halt，bring sth to a standstill/stop, etc.六、较少单词汇的处理办法-ism 简写为 m 比圆：socialism Sm-tion 简简写为 n 比圆：standardization (尺度化) stdn-cian 简简写为 o 比圆：technician techo-ing 简写为 g 比圆：marketing (商场营销) MKTg-ed 简写为 d 比圆：accepted acptd-able/ible/ble 简写为 bl 比圆：available avbl-ment 简写为 mt 比圆：amendment amdmt-ize 简写为 z 比圆：recognize regz-ful 简写为 fl 比圆：meaningful mnfl。

Oncore Receiver - 1024 Week Roll-Over DatesExcept as noted, all receivers were manufactured by MotorolaDisclaimer – This App-Note was originally created on January 15, 2014 in anticipation of the first 8 channel VP Oncore receivers reaching their internal, 1024 week limit later in that year. Subsequent revisions included additional Motorola Oncore products. During the process of compiling this data, it became clear that the most accurate way to define a specific receiver’s 1024 week roll-over date, is to issue the binary @@Cj Receiver ID Command to the specific receiver of interest and observe the “Software Date.”Add 1024 weeks to that number to derive the roll-over date. In some cases (notes on last page) even the Software Date returned by the @@Cj Receiver message is not always accurate! Summary - The following information was partially derived from the original Motorola Firmware Release App-Notes. If information was not available from Motorola, roll-over dates were determined either by customer inputs or testing of various Oncore receivers in Synergy’s tech-support lab.When it is not possible to query the receiver directly, this App-Note is intended to be used as a guide only for the various Oncore receiver’s roll-over dates. Differences from the listed ”Software Date” in the tables below, have been noticed for Motorola’s internal customers and house accounts (like iDEN and OnStar, etc.) and those who purchased Receivers through domestic and international distributors. In addition, many Oncore receivers have been re-flashed to upgrade receiver features over the years. Those receivers, usually with the letter “R” placed anywhere in the part number, are not included here. Motorola’s published App-Notes did not always include VP, GT, GT+, UT, UT+, M12 and M12+ Oncore firmware “Base Dates” that matched the receiver’s assigned Software Date as shown in the receivers@@Cj ID message. Firmware dates for the GT+ navigation receivers were not always announced in Motorola’s firmware update App Notes, so, where available, the dates listed in the table below are from engineering samples. Because of the above, and some firmware App-Notes not released by Motorola, this Oncore receiver Week Roll-Over information is presented as guide only.Note that an Oncore receiver’s 1024 Week Roll-Over date is completely separate from the NavStar GPS Satellite constellation’s GPS End of Week (EOW) Roll-Over coming on April 6, 2019. A GPS World article on the first, 1999 GPS EOW is here: http://gauss2.gge.unb.ca/gpsworld/gpsworld.november98.pdf. Notes for April 6 2019 are here: https:///cgsic/meetings/2017/powers.pdf and here: https:///sites/default/files/documents/Memorandum_on_GPS_2019.pdfMotorola either did not test, or did not disseminate test results for distribution, on any of the PVT-6, Basic, VP, UT\UT+, GT\GT+ or M12+ receivers for the April 2019 GPS End of Week roll-over.Details - All Motorola Oncore series GPS receivers, contain an internal, 1024 week counter that is based on the receiver’s firmware compile date. A receiver’s“Software Date,” as displayed in the receiver’s@@Cj ID Message, were defined by Motorola’s software engineering staff. The Software Date, starting on row 6 column 16 of the below Receiver ID matrix, should reflect the firmware’s final compile date from which a week roll-over date can be calculated but deviations from this standard have been noted.© Synergy Systems, LLC 2008 - 2019 All rights reserved.SynPaQ® and Time Proven Products and Support® are registered trademarks of Synergy Systems, LLCAn example of firmware date confusion can be seen with UT+ v3.2. The observed “Software Date” on a Synergy sample using the @@Cj Receiver ID command, shows 8/23/2000 but Motorola’s “Oncore Technical Application Note” says the Default year changed to 1/1/2000. Issuing the @@Cj Receiver ID Command to the specific receiver of interest is the only reliable way to determine the 1024 week roll-over date. Always believe the receiver being tested!As stated above, the best method of determining a receiver’s actual 1024-week roll-over date is to use the @@Cj Receiver ID command and observe the response. Add 1024 weeks to the observed date to reveal the receiver’s 1024 Week Roll-Over date. A simple to use date Calculator is here:https:///date/dateadded.html?m1=8&d1=1&y1=2000&type=add&ay=&am=&aw =1024&ad=&rec=OEM receivers later than the PVT-6, Basic Oncore and VP Oncore (i.e. GT+, UT+, M12+) do not have the capability of permanently setting the base year date (epoch) due to the lack of on-board, non-volatile flash memory. Review the individual Oncore receiver Firmware Release Notes for details here:/support/motorola-legacy-products/An estimated Roll-Over date is used (below) when a publish date and\or a physical GPS board sample was not available to test. Here are the Oncore GPS Receiver Week Roll-Over dates reported by the Motorola App Note, the @@Cj message, and Synergy or customer Oncore receiver engineering samples:© Synergy Systems, LLC 2008 - 2019 All rights reserved.SynPaQ® and Time Proven Products and Support® are registered trademarks of Synergy Systems, LLC2. Motorola’s Firmware Note for the GT+ v2.2 firmware update lists a Default Date of January 1, 1998 but the Motorola Firmware App-Note is dated much later at “8/98” giving a low confidence that the roll-over date is correct.© Synergy Systems, LLC 2008 - 2019 All rights reserved.SynPaQ® and Time Proven Products and Support® are registered trademarks of Synergy Systems, LLC** Motorola Firmware App Note incorrectly published 3/1999e = If no firmware date published, or available from a test sample, an estimate based on the first day ofthe Release Note month (which may be off by +/- a couple of months!).Firmware v1.7 marked the beginning of the M12+ Series receivers (there was not an M12 receiver with v1.7). Unfortunately, Motorola did not make a distinction between the M12 and M12+ receivers in their “M12 Oncore Firmware Version History” App-Note:/wp-content/uploads/2018/11/m12-nav-firmware-history-v1.5.pdf Notes: 1. Other, commercially released, Motorola Oncore OEM GPS timing receivers, withdifferent version numbers and firmware dates, were produced between 1992 and 2005. Those special part numbers were reserved for Motorola’s internal automotive group, Motorola’s iDEN cellular products group and volume customers such as GM OnStar. Because firmware for these products was customized for the application, the firmware dates will not match those above.2. Some of Motorola’s volume receiver users were assigned special receiver and firmware partnumbers for VP, UT+, M12 and M12+ Oncore Navigation or Timing receivers. The 1024 WeekRoll-Over for those receivers must be calculated using the firmware date reported in the @@Cj message. Motorola either did not test, or did not publish a test for distribution, on any of the VP, UT\UT+, GT\GT+ or M12+ receivers for the April 2019 GPS End of Week roll-over.A Work-Around for Oncore receivers past their 1024 week - (a) With the receiver powered off, disconnect the GPS antenna (b) power-on the receiver and set the date and time (for PVT-6 and VP Oncore models the receiver must be in idle mode and the @@Ab GMT offset set first) (c) Connect the GPS antenna (set the PVT-6 and VP Oncore receivers to Fix Mode) and allow the receiver to acquire a 3-D fix and download an Almanac (about 13 minutes). The time and date should now be correct. Follow this procedure every time the receiver is power-cycled.© Synergy Systems, LLC 2008 - 2019 All rights reserved.SynPaQ® and Time Proven Products and Support® are registered trademarks of Synergy Systems, LLCInformation in the tables above is based on several sources thought to be reliable but not guaranteed in any way: (1) Motorola firmware release notes were noted for the various Oncore GPS receivers (2) Observed firmware dates were derived from engineering samples at Synergy or (3) supplied by customers.Firmware Release Notes do not reflect the actual software date unless specifically mentioned in the note itself. In some cases, the VP Oncore engineering samples made available for this study may have been re-flashed and may contain a Firmware Date other than the original date established at the factory.In collating the above information, Synergy has reviewed Mot orola’s documentation made available as App-Notes and Firmware Release Notes received from a period of 1992 through 2005. Many of he GT+ Oncore firmware dates were not included in Motorola’s release Notes.If users of Motorola’s legacy receivers have accurate firmware roll-over dates for any of the above receivers, please forward it to*********************** for inclusion in this App Note.iLotus M12M Oncore 12 channel GPS ReceiversThe first timing and navigation boards produced by iLotus were RoHS 5 of 6. In 2007, iLotus started producing RoHS 6 of 6 timing and navigation boards with different part numbers as shown below. The firmware dates were the same for both 5 of 6 and 6 of 6 models.the M12M receivers were tested by iLotus in 2013 for the GPS Satellite System End of Week (EOW) April 2019 Week Rollover (different from the subject of GPS receiver week roll-over discussed above). They performed normally as expected with no user intervention. Please request iLotus M12M GPS End of**********************************************.iLotus M12M Oncore GPS receivers – The first timing and navigation boards produced in 2006 by iLotus were RoHS 5 of 6. In 2007, iLotus started producing RoHS 6 of 6 timing and navigation boards with different part numbers (shown above). Firmware dates were the same for both 5 of 6 and 6 of 6 models. Historical Note - Synergy’s distribution contract with Motorola was terminated when their GPS Division was sold in June of 2005 to two entities. The navigation portion went to Continental in Germany and the timing part went to SiRF Technologies in San Jose, CA. Motorola selected iLotus of Singapore, an approved CM for Motorola products, to produce their new M12M GPS receiver for use by other Motorola Divisions and to Synergy Systems, LLC for general distribution.© Synergy Systems, LLC 2008 - 2019 All rights reserved.SynPaQ® and Time Proven Products and Support® are registered trademarks of Synergy Systems, LLCIn the intervening years, Synergy has provided continued support including technical assistance for migrating to the Motorola designed M12M GPS receivers produced by iLotus, and Synergy’s SSR Series Multi-GNSS boards. End of life and transition support has included top level testing of various receivers for the NavStar Constellation’s April 6, 2019 GPS End of Week (EOW) Roll-Over but not for confirmation of the roll-over dates of the individual receivers (PVT-6, VP, GT\GT+, UT\UT+, M12\M12+) as outlined in this App-Note.Additional, more in-depth receiver testing is available when required from testing agencies with satellite simulators. For example, testing of specific receiver parameters like confirming exact GPS receiver roll-over dates (when Motorola documentation is not sufficient). In those cases, we recommend contacting our engineering partner of twenty years, Rick Hambly at CNS Systems Inc. .Rick, an expert in precision timing applications, has provided versions of his CNS Clocks to the world-wide radio astronomy community, NASA and others for over twenty years. He can be contacted at (410) 987-7835 or *************** for a discussion of test needs and a quotation for testing work.Note - 2 March 2019 - Motorola’s “Oncore Technical Application Note” for UT+ firmware release v3.2 dated 10/2/2000 incorrectly noted item 3 “Default year changed to 1/1/2000. the actual year, as indicated by several UT+ GPS receiver samples is August 23, 2000. The UT+ section of the week roll-over table above has been corrected for the UT+ with v3.2 firmware. The actual roll-over date will be 8 April 2020.10 March 2019 – Added CNS Systems, Inc. as a source for additional receiver testing and consultation 15 March 2019 – Added (1) the roll-over date of January 11, 2019 for the UT+ model numberR5xxxUxxx4 with v3.1 firmware. (2) roll-over date of February 26, 2015 for the XT Oncore model number A1xxxxBxx5. (3) roll-over date of February 26, 2015 for the VP\B4 Oncore model number B4xxxPxxx5. 16 March 2019 – Recent testing indicated that even the “normally reliable” @@Cj Receiver ID message does not always return a Software Date that coincides with Motorola’s published material or the information in the @@Cj Receiver ID message itself. For example, this UT+ receiver should have rolled-over in August of 2018 but it is still working normally as of March 14, 2019:Added two more links for explanation of the NavStar GPS Satellite constellation’s GPS End of Week (EOW) Roll-Over coming on April 6, 2019© Synergy Systems, LLC 2008 - 2019 All rights reserved.SynPaQ® and Time Proven Products and Support® are registered trademarks of Synergy Systems, LLC。

新概念英语第2册一课一练Lesson 1 A private conversation用所给单词或短语的正确形式填空。

1.How can you ________________ this awful noise?2.I really ________________ that concert.3.Would you like to ________________ tonight?4.Local people ________________ very ________________ about the plans toclose another hospital.5.________________and let me look at your back.6.How many times do I have to ask you to ________________?Complete the sentences by translating the Chinese into English.根据汉语提示完成下列句子。

1. 每个圣诞节，孩子们都排练一场有意思的戏剧。

The children always perform ________________ every Christmas.2. 为了弄个好座位，我早早地来到了剧院。

I got to the theatre early ________________.3. 他记了些笔记供自己私人使用。

He made some notes for his ________________.4. 我和谁出去不关你的事情。

It’s________________who I go out with.5. 站在汤姆身后的女孩是谁？Who’s the girl standing ________________?从[A]、[B]、[C]、[D]四个选项中，选出可以填入空白处的最佳选项。

南京市、盐城市 2022 届高三年级第二次模拟考试英语30做题时，先将答案标在试卷上。

录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。

第一节(共 5 小题;每小题 1.5 分，满分7.5 分)听下面 5 段对话。

每段对话后有一个小题，从题中所给的 A 、B 、C 三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10 秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1. What is the probable relationship between the speakers?A. Editor and reader.B. Husband and wife.C.Customer and salesperson.2. What will the speakers probably do?A. Search for the lake.B. Hike along the easy path.C. Climb up the mountain.3. How much will the man receive from his father?A. 400 yuan.B. 600 yuan.C. 800 yuan.4. What does the man probably mean?A. He wants to have a rest.B. He agrees to go to the cinema.C. He will have a basketball game.5. Which tourist spot does the woman highly recommend?A. The Great Wall.B. The Forbidden City.C. The Summer Palace.第二节(共15 小题;每小题 1.5 分，满分22.5 分)听下面 5 段对话或独白。

放下手机就可积分换奖励导读：你是不是总是低着头看手机？你是不是已经不知不觉地变成了“smo mbie 手机僵尸”？智能手机给现代人的生活带来了巨大的便利，但同时也成为了一个严重转移人们注意力的事物。

一个三人程序开发小组称他们编写了一个能让现代人“放下手机”的程序。

跟随本集《外刊精读》，来了解这个只要你放下手机，就可以让你积分换奖励的手机程序。

一、语篇泛读Vocabulary: attention and distraction 词汇：注意力和分散注意力的东西We’re all probably guilty of using our phones a little too often. With the rise of the mobile phone, and later the smartphone, access to communication and information has never been so convenient or tempting Of course, there are those who only pay it any attention when it goes off or sends them an alert. But there are many who find that their phone is a constant distraction.There's been an abundance of articles recently relating to mobile phone addiction or diversion. In the UK, looking at a mobile phone rather than focussing on the road has been made illegal.Having your attention diverted from driving by a phone carries a stiff penalty. It’s also no coincidence that the word ‘smombie’ has been coined. The word is made up of two: smartphone zombie, and it describes those p eople who walk around totally captivated by their phone completely unaware of their surroundings.Smartphone disruption is an issue in schools too. A study by the University of Texas has suggested that just having a smartphone within eyeshot can reduce pro ductivity, slow down response speed and reduce grades, as the eyes of the students keep being drawn away from their work. A second, related study by the London School of Economics has found that students who did not use their smartphones on school grounds saw an increase of 6.4% in test scores.This issue of productivity and the degree to which smartphones engross young people caused three students from Copenhagen Business school to develop an app to attempt to help combat smartphone fascination.The app, called ‘Hold’, rewards students for time they spend not using the device. For every 20 minutes that a phone is not used between the hours of seven in the morning and 11 at night, its user will accumulate 10 points.These points can be exchanged for a numbe r of goods and services on the app’s marketplace, with brands such as Caffè Nero, Vue cinemas and Amazon signing up. For example, to earn two free coffees, students will need 300 points. This is the equivalent of 10 hours on the app.The app has already be come the centre of attention in Scandinavia, with more than 120,000 users across Norway, Denmark and Sweden. And soon it will be launched in 170 universities in the UK too.Could the era of people zoning out on reality and only tuning in to their phones be over? As more and more pay heed, it’s certainly possible. And how else are you likely to be rewarded for not paying attention?二、词汇表三、测试与练习阅读课文并回答问题。

a rX iv:mat h /56454v1[mat h.RA]22J u n25A note on infinitely distributive inverse semigroups ∗Pedro Resende Departamento de Matem´a tica,Instituto Superior T´e cnico,Av.Rovisco Pais 1,1049-001Lisboa,Portugal By an infinitely distributive inverse semigroup will be meant an inverse semi-group S such that for every subset X ⊆S and every s ∈S ,if X exists then so does (sX ),and furthermore (sX )=s X .One important aspect is that the infinite distributivity of E (S )implies that of S ;that is,if the multiplication of E (S )distributes over all the joins that exist in E (S )then S is infinitely distributive.This can be seen in Proposition 20,page 28,of Lawson’s book [1].Although the statement of the proposition mentions only joins of nonempty sets,the proof applies equally to any subset.The aim of this note is to present a proof of an analogous property for binary meets instead of multiplication;that is,we show that for any infinitely distributive inverse semigroup the existing binary meets distribute over all the joins that exist.A useful consequence of this lies in the possibility of constructing,from infinitely distributive inverse semigroups,certain quantales that are also locales (due to the stability of the existing joins both with respect to the multiplication and the binary meets),yielding a direct connection to ´e tale groupoids via the results of [2].The consequences of this include an algebraic construction of “groupoids of germs”from certain inverse semigroups,such as pseudogroups,and will be developed elsewhere.Lemma.Let S be an inverse semigroup,and let x,y ∈S be such that the meet x ∧y exists.Then the joinf = {g ∈↓(xx −1yy −1)|gx =gy }exists,and we have x ∧y =fx =fy .Proof.Consider the set Z of lower bounds of x and y ,Z ={z ∈S |z ≤x,z ≤y },whose join is x∧y.By[1,Prop.17,p.27],the(nonempty)setF={zz−1|z∈Z}has a join f= F that coincides with( Z)( Z)−1=(x∧y)(x∧y)−1. Hence,x∧y=fx=fy.The lemma now follows from the fact that the elements zz−1with z∈Z are precisely the idempotents g∈↓(xx−1yy−1) such that gx=gy.Theorem.Let S be an infinitely distributive inverse semigroup,let x∈S, and let(y i)be a family of elements of S.Assume that the join i y i exists, and that the meet x∧ i y i exists.Then,for all i the meet x∧y i exists,the join i(x∧y i)exists,and we havex∧ i y i= i(x∧y i).Proof.Let us write y for i y i,e i for y i y−1i,and let f be the idempotentf= {g∈↓(xx−1yy−1)|gx=gy},which exists,by thefirst lemma.Furthermore,also by thefirst lemma,we have x∧y=fx=fy.We shall prove that x∧y i exists for each i,and that2it equals e i(x∧y)=e i fx=e i fy.By the second lemma,it suffices to show that for each i the joinf i= {g∈↓(xx−1y i y−1i)|gx=gy i}exists and equals e i f.Consider g∈↓(xx−1y i y−1i)=↓(xx−1e i)such that gx=gy i.The condition g∈↓(xx−1e i)implies that g≤e i,and thus g=ge i. Hence,since y i=e i y,the condition gx=gy i implies gx=ge i y=gy,and thus g≤f because furthermore g∈↓(xx−1yy−1).Hence,we have both g≤e i and g≤f,i.e.,g≤e i f,meaning that e i f is an upper bound of the setX={g∈↓(xx−1e i)|gx=gy i}.In order to see that it is the least upper bound it suffices to check that e i f belongs to X,which is immediate:first,e i f≤xx−1because f≤xx−1,and thus e i f∈↓(xx−1e i);secondly,(e i f)x=(e i e i f)y=(e i fe i)y=(e i f)(e i y)=(e i f)y i. Hence,e i f∈X,and thus e i fx=x∧y i.In addition,the join i e i exists and it equals yy−1,by[1,Prop.17,p.27],and thus,using infinite distributivity and the fact that f≤yy−1,we obtainx∧y=fx=yy−1fx=( i e i)fx= i(e i fx)= i(x∧y i).。

认识国旗的英文作文英文：When it comes to recognizing national flags, I believe it requires both knowledge and observation skills. First of all, you need to know the basic design and colors of the flag, and what they represent. For example, the American flag has 13 stripes representing the original 13 colonies and 50 stars representing the 50 states. Secondly, you need to pay attention to the context in which the flag is displayed. Is it being flown at a government building or at a sports event? Is it being flown at half-mast to honor someone who has passed away? These details can provide important clues to help you correctly identify the flag.Another tip is to look for unique features or symbols on the flag. For instance, the Canadian flag has a maple leaf in the center, while the Japanese flag has a redcircle in the middle. These distinct elements can make it easier to differentiate between similar-looking flags.In addition to these tips, it's also helpful topractice recognizing flags by studying them and testing yourself. There are many online resources and appsavailable that can help with this. And of course, the more you travel and encounter different flags, the better youwill become at recognizing them.中文：对于认识国旗，我认为需要有知识和观察技巧。