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Compact 4-in-1mono laser printerMFC-L2730DWwww.brother.euWIRELESSPerformance designed for businesses of tomorrow Duplicating, digitising and sharing documents has never been easier.The MFC-L2730DW, offers true network capabilities, with wired and wireless connectivity. Documents can be scanned and shared directly to a network folder, making it easy to share and archive.Save time by printing-from and scanning-to popular cloud services directly from the 6.8cm touchscreen including Dropbox, Google Drive™, Evernote, OneNote and more. The most frequently used functions, can be easily created as customshortcuts on the touchscreen.Maximum value for moneyThe MFC-L2730DW comes with a large 1,200 page inbox toner, providing crisp black text every time. Together with a host of feature rich functionality, ensures that your print outs are professional and cost effective.Quiet without compromisePrint quietly without comprising on speed or quality, operating at the lowest decibel in class (under 50dB). All the models throughout the range are designed to sit on your desk, printing quietly at full speed while you work without interruption. Designed to go the distanceBuilt to perform for longer. The MFC-L2730DW, has been designed with you in mind. Made from robust and hardwearing materials and supported by outstanding serviceas standard, providing the peace of mind that your printer will keep on going.1 Approx declared yield value in accordance with ISO/IEC 19752.2 Calculated with 80g/m² paper.3 Windows ® & Mac ® only. GeneralTechnologyElectrophotographic Laser PrinterLaser Classification Class 1 Laser Product (IEC60825-1:2014)Processor 600MHz Memory 128MBWired Network Interface 10Base-T/100Base-TXPrintPrint Speed Standard (A4)Up to 34ppm (pages per minute)Print Speed 2-Sided (A4)Up to 16 sides per minute (8 sheets per minute)ResolutionUp to 1,200 x 1,200 dpi Quiet ModeA mode to reduce the printing noise by reducing the print speed to 13ppmAutomatic 2-Sided Printing Print on to both sides of the paperFPOT (First Print Out Time)Less than 8.5 seconds from ready modeWarm Up TimeLess than 9 seconds from sleep modePrint Languages PCL6, BR-Script3(PostScript ®3TM Language Emulation), PDF version1.7Printer FunctionsN-up Printing 3Reduce up to 2, 4, 9, 16 or 25 A4 pages into just one A4 page(Mac, up to 2, 4, 6, 9, or 16)Poster Printing 4Enlarge 1 A4 page into a poster using 4, 9, 16 or 25 A4 pages Watermark Printing 4Watermark your documents with predefined text or with your own user-defined messagesID Printing 4Add identification to yourprinted documents (date & time, short custom message or PC username)Manual 2-Sided Print 4Manual 2-sided printing(recommended for media not supported by automatic 2-sided print)Booklet Printing 4Print documents in A5booklet format using automatic or manual 2-sided printPrint Profiles 3Store your favourite driver settings as profiles to easily recall themPrint Text In Black 4Converts all text in your documents to black when printedPrint Archive 4An electronic carbon copyfeature that saves an electronic copy of all printed documents as a PDF fileAll specifications correct at the time of printing and are subject to change.Brother is a registered trademark of Brother Printer DriverWindows ®Windows ® 10(32 & 64 bit editions)Windows ® 8(32 & 64 bit editions)Windows ® 7(32 & 64 bit editions)Windows ® Server 2016 (32 & 64 bit editions)*Windows ® Server 2012, 2012R2 & 2008R2* Windows ® Server 2008 (32 & 64 bit editions)*Macintosh 5macOS 10.8.x or greater Linux 5CUPS, LPD/LPRng (32 & 64 bit editions)Embedded Fonts (PCL)66 scalable fonts, 12 bitmap fonts, 16 barcodesEmbedded Fonts (Postscript)66 scalable fontsEmbedded Barcodes (PCL)Code39, Interleaved 2 of 5, FIM (US-PostNet, Post Net (US-PostNet) EAN-8, EAN-13, UPC-A, UPC-E, Codabar, ISBN(EAN), ISBN(UPC-E), Code128(set A, set B, set C), EAN128 (set A, set B, set C), Code93, GS1Databar, MSI* Windows® Server supports network printing onlyWireless Network IEEE 802.11b/g/n Control Panel6.8cm colour touchscreen Local Interface Hi-Speed USB 2.0Shortcuts 12PostScript Universal Printer DriverDriver for Windows ® that enables you to print to any network or locally-connected Brother laser printer that supports PostScript PCL DriverGeneric PCL XL driverAll specifications correct at the time of printing and are subject to change.Brother is a registered trademark of Brother Industries Ltd. Brand product names are Media SpecificationMedia Types & Weights StandardPlain & recycled paper (between 60 - 163g/m 2)Manual feed slotPlain, Recycled, Bond, Label, Envelope,(between 60 - 230g/m 2) 2-sided PrintPlain & recycled paper (between 60 - 105g/m 2)Envelope & Label Printing Yes, from the Manual feel slot: support for 1 envelope / sheetMedia Sizes Standard TrayA4, Letter, A5, A5 (Long Edge), A6, Executive Manual feed slotWidth: 76.2mm to 215.9mm x Length: 127mm to 355.6mm 2-sided Print A4Mobile / Web Based Printing & ScanningBrother iPrint&Scan (Android)Print from, scan to, sendfaxes, preview received faxes, preview copies and check the machine status from an Android deviceBrother iPrint&Scan (iPad / iPhone / iPod)Print from, scan to, send faxes, preview received faxes, preview copies and check the machine status from an iPad / iPhone / iPod TouchBrother iPrint&Scan (Windows ® Phone)Print from and scan to a smart phone running the Windows ® Phone Operating SystemBrother Print&Scan (Windows ® 8,10 & RT)Print from and scan to a Windows ® 8,10 or Windows RT TabletGoogle Cloud Print 2.0Print most common file types from any Google Cloud Print enabled application CreativeCentre 8Download and print Brother CreativeCenter contentApple AirPrintPrint from and scan to most common file types from any AirPrint enabled application Brother Print Service Plugin Print from Android devices without a dedicated App MopriaPrint most common file types from Mopria supported Android devicesWeb Connect 8Print from and scan to without using a PC on Box, Dropbox, Evernote, OneDrive, Google Drive TM OneNoteCopySpeed - (A4)Up to 34cpm(copies per minute)FCOT (First Copy Time Out)Less than 10 seconds from ready mode ResolutionUp to 600 x 600dpiMulti-Copying/Stack/Sort Makes up to 99 copies of each page / Stacks or Sorts Enlargement/Reduction RatioReduce or Increase document sizes from 25% to 400% in 1% incrementsN in 1 CopyingAllows the user to compress 2 or 4 pages on to a single A4 sheet2in1 ID CopyingAllows the user to copy both sides of an ID card to a single A4 sheetGrey Scale256 shades of grey (8 bit)Receipt CopyingProduces clearer copies of receiptsEnlarge Text Copy 8Makes reading copieddocuments easier if the size of the text on the original document is small1 Approx declared yield value in accordance with ISO/IEC 19752.2 Calculated with 80g/m² paper.3 Windows ® & Mac ® only.4 Windows ® only.Standard Paper HandlingPaper Input 2Standard Tray - 250 sheets Manual feed slot - 1 sheetAutomatic Document Feeder (ADF) – 50 SheetsPaper Output 2Face Down - 120 sheets Face Up(Straight Paper Path) - 1 sheet1 Approx declared yield value in accordance with ISO/IEC 19752.2 Calculated with 80g/m² paper.3 Windows ® & Mac ® only.4 Windows ® only.Fleet Management ToolsUnattended Installer 4Ability to centrally deploy and customise our drivers and software MSI Installer 4Modular installers that can be distributed through Active Directory ®BRAdmin Light 4&5LAN/WAN management softwareEmbedded Web ServerWeb based print management software embedded onto the deviceDriver Deployment Wizard 4Easily create print drivers for hassle free deployment over your networkPrintSmart Solutions (optional)PrintSmart Cost Control Monitor and control printing costs for all Brother and 3rd party devicesFor more information on PrintSmart Solutions visit:www.brother.euScanScanner TypeCIS (Contact Image Sensor)Colour & Mono Scanning YesScan Speed Mono23.6ipm (images per minute)Scan Speed Colour7.5ipm (images per minute)Scan Resolution from ADF Up to 600 x 600dpi Scan Resolution from Scanner GlassUp to 1,200 x 1,200dpiInterpolated Scan ResolutionUp to 19,200 x 19,200dpi Colour Depth16,777,216 colour variations (24 bit)Grey Scale256 shades of grey (8 bit)Standard Functions 8Scan to E-mail, OCR, Image, File & FTPScan FeaturesRemove Background, Skip Blank Page 4, ID Scan 4, 1 to 2 Scan 4, Split PDFScan To Microsoft Office 8Scan to Microsoft ® Word, Microsoft ® Excel & Microsoft ® PowerPointScan to Searchable PDFScan documents to searchable PDF filesScan to SharePoint 4&8Scan documents directly into SharePointWindows ® Web Services ScanningScan direct into Windows ®(from Windows ® 7 & onwards) without needing to install a scanner driverScanner DriverWindows ®TWAIN & WIA Windows ® 10(32 & 64 bit editions)Windows ® 8.1(32 & 64 bit editions)Windows ® 8(32 & 64 bit editions)Macintosh 5TWAIN & AirPrintmacOS 10.8.x or greater Linux 5SANE(32 & 64 bit editions)Address BookSpeed Dials200 locations for E-mail addresses and fax numbersGroup DialA combination of up to 20 groups can be stored for broadcastingAll specifications correct at the time of printing and are subject to change.Brother is a registered trademark of Brother Industries Ltd. Brand product names areNetwork and Security Wired NetworkBuilt in Ethernet 10Base-T/100Base-TXNetwork ProtocolsTCP/IP (IPv4 and IPv6)Wired Network SecuritySMTP-AUTH, SNMP v3,SSL/TLS(SMTP,HTTP,IPP)Wireless NetworkIEEE 802.11b/g/n(Infrastructure Mode /Adhoc Mode)Wireless Set-Up SupportWi-Fi Protected Setup (WPS)Wireless ApplicationsVertical PairingE-mail NotificationsAutomatically have the devicesend e-mail alerts when itrequires attention, such aswhen the toner is low orneeds replacingE-mail ReportsReceive usage reports on aregular basis via e-mailIP FilterRestrict which network userscan or cannot access thedevice over the network(IPv4 only)Setting LockSecures access to the devicescontrol panel by locking itIPv4ARP, RARP, BOOTP, DHCP,APIPA(Auto IP), WINS/NetBIOSname resolution, DNSResolver, mDNS, LLMNRresponder, LPR/LPD, CustomRaw Port/Port9100, SMTPClient, IPP/IPPS, FTP Server,SNMPv1/v2c/v3, HTTP/HTTPSserver, TFTP client and server,ICMP, Web Services (Print),SNTP ClientIPv6NDP, RA, DNS resolver, mDNS,LLMNR responder, LPR/LPD,Custom Raw Port/Port9100,IPP/IPPS, SMTP Client, FTPServer, SNMPv1/v2c/v3, HTTP/HTTPS server, TFTP client andserver, ICMPv6, SNTP Client,Web Services (Print)Supplies Inbox Toner700 pages1Standard Yield Toner1,200 pages1 (TN-2410)High Yield Toner3,000 pages1 (TN-2420)Drum (DR-2400)Approx 12,000 pagesCarton ContentsToner cartridge, drum, powersupply cord, driver softwarefor Windows®, Quick Set-UpGuide (PC interface cableNOT included)The frequency of replacementconsumables will varydepending on the complexityof the prints, the percentage ofcoverage, paper size, page perjob, and the type of media.Dimensions and Weights With Carton (WxDxH)410 x 398.5 x 318.5 mm -11.8kgWithout Carton (WxDxH)580 x 517 x 434 mm - 14.7kgDuty Cycles Recommended MonthlyUp to 2,000 pages monthlyprint volume Maximum Monthly6Up to 15,000 pages monthly print volume1 Approx declared yield value in accordance with ISO/IEC 19752.2 Calculated with 80g/m² paper.3 Windows® & Mac® only.4 Windows® only.All specifications correct at the time of printing and are subject to change. Brother is a registered trademark of Brother Industries Ltd. Brand product names areFaxFax Modem33,600bps (Super G3)PC Fax Send 9&3Send faxes directly from your PCPC Fax Receive 9&4Receive faxes directly to your PCAutomatic RedialAutomatic redialling if the recipient fax is busy Telephone IndexAn electronic, alphabetical listing of stored speed dials and group numbersChain DiallingAllows the user to store parts for long dialling sequences in different speed dial locations Distinctive Ring Detection (UK & Denmark only)An external service that allows two or more telephonenumbers shared on a single fixed line and use different ring tonesSpeaker / Ring Volume 3 levels and offFax / Tel SwitchAutomatic recognition of fax and telephone reception Super FineEnables quality transmission of very small print and line drawingsECM(Error Correction Mode)The MFC will detect line errors during fax transmission and resend the page(s) of the document that had an error (recipient machines must share this feature for it to work)Fax ForwardingSends a fax received in memory to another pre-programmed fax numberRemote AccessAllows users to remotely access their machineFax RetrievalAllows remote access to faxes stored in the machine Remote MaintenanceAllows users to maintain their MFC remotelyRemote Set-Up 3Allows users to set-up the MFC from their PCGrey Scale256 shades (8 bit) of grey are available for faxingFax StampAdd the date and time to all received faxesCover PageCreate custom cover pages for outgoing faxesContrastAuto / light / darkEnhanced Remote Activate Transfer a fax call, answered on an extension phone, to the fax machine Delayed Timer Up to 50Quick-ScanApproximately 2.5 seconds per page A4 standard resolution Memory Transmission Up to 500 pages (ITU-T Test Chart, Standard Resolution, JBIG)Out of Paper Reception Up to 500 pages (ITU-T Test Chart, Standard Resolution, JBIG)Dual AccessSend the same fax message to up to 250 separate locations (manual 50 locations)BroadcastingReceive usage reports on a regular basis via e-mail Auto ReductionWhen receiving a single page document longer than A4 (297mm) the fax machine will automatically reduce the message to fit onto a single A4 sheet1 Approx declared yield value in accordance with ISO/IEC 19752.2 Calculated with 80g/m² paper.3 Windows ® & Mac ® only.4 Windows ® only.EnvironmentPower Consumption Printing - 440W (260W in quiet mode), Ready - 42W, Sleep - 6.2W,Deep sleep - 0.6W, Off - 0.03W TEC Value1.348kWh / Week Sound Pressure Level Printing 49dbA,Quiet mode printing 44dbA, ReadyUp to30dbAPower SavingThis enables the printer toconsume less energy when not in useToner SavingThis reduces the toner usage and helps to reduce the total cost of printer ownershipEnergy Star Yes Blue Angel YesNordic Swan Yes GS Mark Yes Eco Mode YesAll specifications correct at the time of printing and are subject to change.Brother is a registered trademark of Brother Industries Ltd. Brand product names areAt Brother, our green initiative is simple. We strive to take responsibility,act respectfully and try to make a positive difference to help build a society where sustainable development can be achieved. We call this N ORD IC E C O L AB EL315025All specifications correct at the time of printing and are subject to change.Brother is a registered trademark of Brother Industries Ltd. Brand product names are registered trademarks or trademarks of their respective companies.。
信息的获取-1 BCBBB信息的获取-2 DDCAB信息的获取-3 DBABC信息的获取-4 CBBC实体店购买与网购，实店买可翻阅价格高，网购不能翻阅价格便宜。
信息的获取-5 AD,DAB,登陆百度网，搜索南京，景点，路线，住宿等信息。
信息与信息技术-1 CACDB信息与信息技术-2 DDCDB信息与信息技术-3 BDCAC信息与信息技术-4 CDDBB网络信息检索4-1 ADBDB网络信息检索4-2 BACCB网络信息检索4-3 BBBAD网络信息检索4-4 1.半人马座比邻星2.茉莉花3.mào dié八九十岁的意思。
4.齐白石的蛙声十里出山泉网络信息检索4-5 1.搜索引擎最早是yayoo，后来发展壮大，搜索引擎的工作方式和在图书馆里面进行图书查找的工作差不多2.如果可以直接下载，那么右键菜单选择目标另存为，如果不行那么可以选中链接之后采用下载软件下载。
3.例如：优化查找的速度、扩大资料的范围等。
信息的评价5-1 ABAAAA信息的评价5-2 ACDCAB信息的评价5-3 BACCD信息的评价5-4 ABACD(AC多选）信息的评价5-5 CDBC(ACD多选）信息的编程加工6-1 DADDC信息的编程加工6-2 ADCCA信息的编程加工6-3 CBCCC信息的编程加工6-4 CDB信息的编程加工6-5 C, s=a*a，FBACED信息的智能化加工7-1 CACCB信息的智能化加工7-2 CBCDC信息的智能化加工7-3 ADCBC信息的智能化加工7-4 A,D,D ，BD,ACEF,G信息的智能化加工7-5 C, BEF, ACDFG, ACDGH, 计算机，手机，电话等信息的编码8-1 CACDD信息的编码8-2 BCAD 填空题略信息的编码8-3 BBCC文本信息加工9-1 BAACC文本信息加工9-2 CDABC文本信息加工9-3 DCD文本信息加工9-4 BAD文本信息加工9-5 1，复制、字体、字号、艺术字、页面设置、背景、选择性粘贴、样式、图表、目录、三级标题等2，图形化表达带来直观、生动，纯文本枯燥、不形像等。
一：分类74ls00 2输入四与非门74ls01 2输入四与非门 (oc) 74ls02 2输入四或非门74ls03 2输入四与非门 (oc) 74ls04 六倒相器74ls05 六倒相器(oc)74ls06 六高压输出反相缓冲器/驱动器(oc,30v)74ls07 六高压输出缓冲器/驱动器(oc,30v)74ls08 2输入四与门74ls09 2输入四与门(oc)74ls10 3输入三与非门74ls11 3输入三与门74ls12 3输入三与非门 (oc) 74ls13 4输入双与非门 (斯密特触发)74ls14 六倒相器(斯密特触发) 74ls15 3输入三与门 (oc)74ls16 六高压输出反相缓冲器/驱动器(oc,15v)74ls17 六高压输出缓冲器/驱动器(oc,15v)74ls18 4输入双与非门 (斯密特触发)74ls19 六倒相器(斯密特触发) 74ls20 4输入双与非门74ls21 4输入双与门74ls22 4输入双与非门(oc)74ls23 双可扩展的输入或非门74ls24 2输入四与非门(斯密特触发)74ls25 4输入双或非门(有选通) 74ls26 2输入四高电平接口与非缓冲器(oc,15v)74ls27 3输入三或非门74ls28 2输入四或非缓冲器74ls30 8输入与非门74ls31 延迟电路74ls32 2输入四或门74ls33 2输入四或非缓冲器(集电极开路输出)74ls34 六缓冲器74ls35 六缓冲器(oc)74ls36 2输入四或非门(有选通) 74ls37 2输入四与非缓冲器74ls38 2输入四或非缓冲器(集电极开路输出74ls39 2输入四或非缓冲器(集电极开路输出)7 4ls40 4输入双与非缓冲器7 4ls41 bcd-十进制计数器7 4ls42 4线-10线译码器(bcd输入)7 4ls43 4线-10线译码器(余3码输入)7 4ls44 4线-10线译码器(余3葛莱码输入)7 4ls45 bcd-十进制译码器/驱动器7 4ls46 bcd-七段译码器/驱动器4ls47 bcd-七段译码器/驱动器74ls48 bcd-七段译码器/驱动器74ls49 bcd-七段译码器/驱动器(oc)74ls50 双二路2-2输入与或非门(一门可扩展)74ls51 双二路2-2输入与或非门74ls51 二路3-3输入,二路2-2输入与或非门74ls52 四路2-3-2-2输入与或门(可扩展)4ls53 四路2-2-2-2输入与或非门(可扩展)74ls53 四路2-2-3-2输入与或非门(可扩展)74ls54 四路2-2-2-2输入与或非门74ls54 四路2-3-3-2输入与或非门74ls54 四路2-2-3-2输入与或非门74ls55 二路4-4输入与或非门(可扩展)74ls60 双四输入与扩展74ls61 三3输入与扩展4ls62 四路2-3-3-2输入与或扩展器74ls63 六电流读出接口门74ls64 四路4-2-3-2输入与或非门 74ls65 四路4-2-3-2输入与或非门(oc)74ls70 与门输入上升沿jk 触发器74ls71 与输入r-s 主从触发器74ls72 与门输入主从jk 触发器74ls73 双j-k 触发器(带清除端)4ls74 正沿触发双d 型触发器(带预置端和清除端)74ls75 4位双稳锁存器74ls76 双j-k 触发器(带预置端和清除端)74ls77 4位双稳态锁存器74ls78 双j-k 触发器(带预置端,公共清除端和公共时钟端)74ls80 门控全加器74ls81 16位随机存取存储器4ls82 2位二进制全加器(快速进位) 4ls83 4位二进制全加器(快速进位)7 4ls84 16位随机存取存储器74ls85 4位数字比较器7 4ls86 2输入四异或门7 4ls87 四位二进制原码/反码/oi单元7 4ls89 64位读/写存储器7 4ls90 十进制计数器7 4ls91 八位移位寄存器74ls92 12分频计数器(2分频和6分频)7 4ls93 4位二进制计数器7 4ls94 4位移位寄存器(异步)7 4ls95 4位移位寄存器(并行io)7 4ls96 5位移位寄存器7 4ls97 六位同步二进制比率乘法器4ls100 八位双稳锁存器74ls103 负沿触发双j-k 主从触发器(带清除端)74ls106 负沿触发双j-k 主从触发器(带预置,清除,时钟)74ls107 双j-k 主从触发器(带清除端)74ls108 双j-k 主从触发器(带预置,清除,时钟)74ls109 双j-k 触发器(带置位,清除,正触发)4ls110 与门输入j-k 主从触发器(带锁定)74ls111 双j-k 主从触发器(带数据锁定)74ls112 负沿触发双j-k 触发器(带预置端和清除端)74ls113 负沿触发双j-k 触发器(带预置端)74ls114 双j-k 触发器(带预置端,共清除端和时钟端)74ls116 双四位锁存器74ls120 双脉冲同步器/驱动器4ls121 单稳态触发器(施密特触发)74ls122 可再触发单稳态多谐振荡器(带清除端)74ls123 可再触发双单稳多谐振荡器74ls125 四总线缓冲门(三态输出)74ls126 四总线缓冲门(三态输出)74ls128 2输入四或非线驱动器74ls131 3-8译码器4ls132 2输入四与非门(斯密特触发)74ls133 13输入端与非门74ls134 12输入端与门(三态输出)74ls135 四异或/异或非门74ls136 2输入四异或门(oc)74ls137 八选1锁存译码器/多路转换器74ls138 3-8线译码器/多路转换器 74ls139 双2-4线译码器/多路转换器4ls140 双4输入与非线驱动器74ls141 bcd-十进制译码器/驱动器 74ls142 计数器/锁存器/译码器/驱动器74ls145 4-10译码器/驱动器74ls147 10线-4线优先编码器74ls148 8线-3线八进制优先编码器74ls150 16选1数据选择器(反补输出)74ls151 8选1数据选择器(互补输出)4ls152 8选1数据选择器多路开关74ls153 双4选1数据选择器/多路选择器74ls154 4线-16线译码器74ls155 双2-4译码器/分配器(图腾柱输出)74ls156 双2-4译码器/分配器(集电极开路输出)74ls157 四2选1数据选择器/多路选择器74ls158 四2选1数据选择器(反相输出)4ls160 可预置bcd 计数器(异步清除)74ls161 可预置四位二进制计数器(并清除异步)74ls162 可预置bcd 计数器(异步清除)74ls163 可预置四位二进制计数器(并清除异步)74ls164 8位并行输出串行移位寄存器74ls165 并行输入8位移位寄存器(补码输出)4ls166 8位移位寄存器74ls167 同步十进制比率乘法器74ls168 4位加/减同步计数器(十进制)74ls169 同步二进制可逆计数器74ls170 4*4寄存器堆74ls171 四d 触发器(带清除端)74ls172 16位寄存器堆74ls173 4位d 型寄存器(带清除端)74ls174 六d 触发器4ls175 四d 触发器74ls176 十进制可预置计数器74ls177 2-8-16进制可预置计数器74ls178 四位通用移位寄存器74ls179 四位通用移位寄存器74ls180 九位奇偶产生/校验器74ls181 算术逻辑单元/功能发生器74ls182 先行进位发生器74ls183 双保留进位全加器4ls184 bcd-二进制转换器74ls185 二进制-bcd 转换器74ls190 同步可逆计数器(bcd,二进制)74ls191 同步可逆计数器(bcd,二进制)74ls192 同步可逆计数器(bcd,二进制)74ls193 同步可逆计数器(bcd,二进制)74ls194 四位双向通用移位寄存器4ls195 四位通用移位寄存器74ls196 可预置计数器/锁存器74ls197 可预置计数器/锁存器(二进制)74ls198 八位双向移位寄存器74ls199 八位移位寄存器74ls210 2-5-10进制计数器74ls213 2-n-10可变进制计数器74ls221 双单稳触发器74ls230 八3态总线驱动器4ls231 八3态总线反向驱动器74ls240 八缓冲器/线驱动器/线接收器(反码三态输出)74ls241 八缓冲器/线驱动器/线接收器(原码三态输出)74ls242 八缓冲器/线驱动器/线接收器74ls243 4同相三态总线收发器74ls244 八缓冲器/线驱动器/线接收器74ls245 八双向总线收发器4ls246 4线-七段译码/驱动器(30v)74ls247 4线-七段译码/驱动器(15v)74ls248 4线-七段译码/驱动器74ls249 4线-七段译码/驱动器74ls251 8选1数据选择器(三态输出)74ls253 双四选1数据选择器(三态输出)74ls256 双四位可寻址锁存器4ls257 四2选1数据选择器(三态输出)74ls258 四2选1数据选择器(反码三态输出)74ls259 8为可寻址锁存器74ls260 双5输入或非门74ls261 4*2并行二进制乘法器74ls265 四互补输出元件74ls266 2输入四异或非门(oc)74ls270 2048位rom (512位四字节,oc)4ls271 2048位rom (256位八字节,oc)74ls273 八d 触发器74ls274 4*4并行二进制乘法器74ls275 七位片式华莱士树乘法器74ls276 四jk 触发器74ls278 四位可级联优先寄存器74ls279 四s-r 锁存器74ls280 9位奇数/偶数奇偶发生器/较验器4ls28174ls283 4位二进制全加器74ls290 十进制计数器74ls291 32位可编程模74ls293 4位二进制计数器74ls294 16位可编程模74ls295 四位双向通用移位寄存器74ls298 四-2输入多路转换器(带选通)4ls299 八位通用移位寄存器(三态输出)74ls348 8-3线优先编码器(三态输出)74ls352 双四选1数据选择器/多路转换器74ls353 双4-1线数据选择器(三态输出)74ls354 8输入端多路转换器/数据选择器/寄存器,三态补码输出74ls355 8输入端多路转换器/数据选择器/寄存器,三态补码输出4ls356 8输入端多路转换器/数据选择器/寄存器,三态补码输出74ls357 8输入端多路转换器/数据选择器/寄存器,三态补码输出74ls365 6总线驱动器74ls366 六反向三态缓冲器/线驱动器74ls367 六同向三态缓冲器/线驱动器 74ls368 六反向三态缓冲器/线驱动器 74ls373 八d 锁存器4ls374 八d 触发器(三态同相)74ls375 4位双稳态锁存器74ls377 带使能的八d 触发器74ls378 六d 触发器74ls379 四d 触发器74ls381 算术逻辑单元/函数发生器 74ls382 算术逻辑单元/函数发生器 74ls384 8位*1位补码乘法器74ls385 四串行加法器/乘法器4ls386 2输入四异或门74ls390 双十进制计数器74ls391 双四位二进制计数器74ls395 4位通用移位寄存器74ls396 八位存储寄存器74ls398 四2输入端多路开关(双路输出)74ls399 四-2输入多路转换器(带选通)74ls422 单稳态触发器74ls423 双单稳态触发器 74ls440 四3方向总线收发器,集电极开路74ls441 四3方向总线收发器,集电极开路74ls442 四3方向总线收发器,三态输出74ls443 四3方向总线收发器,三态输出74ls444 四3方向总线收发器,三态输出74ls445 bcd-十进制译码器/驱动器,三态输出74ls446 有方向控制的双总线收发器74ls448 四3方向总线收发器,三态输出74ls449 有方向控制的双总线收发器74ls465 八三态线缓冲器74ls466 八三态线反向缓冲器74ls467 八三态线缓冲器74ls468 八三态线反向缓冲器74ls490 双十进制计数器74ls540 八位三态总线缓冲器(反向)74ls541 八位三态总线缓冲器74ls589 有输入锁存的并入串出移位寄存器74ls590 带输出寄存器的8位二进制计数器74ls591 带输出寄存器的8位二进制计数器74ls592 带输出寄存器的8位二进制计数器74ls593 带输出寄存器的8位二进制计数器74ls594 带输出锁存的8位串入并出移位寄存器74ls595 8位输出锁存移位寄存器74ls596 带输出锁存的8位串入并出移位寄存器74ls597 8位输出锁存移位寄存器74ls598 带输入锁存的并入串出移位寄存器74ls599 带输出锁存的8位串入并出移位寄存器74ls604 双8位锁存器74ls605 双8位锁存器74ls606 双8位锁存器74ls607 双8位锁存器74ls620 8位三态总线发送接收器(反相)74ls621 8位总线收发器74ls622 8位总线收发器74ls623 8位总线收发器74ls640 反相总线收发器(三态输出)74ls641 同相8总线收发器,集电极开路74ls642 同相8总线收发器,集电极开路74ls643 8位三态总线发送接收器74ls644 真值反相8总线收发器,集电极开路74ls645 三态同相8总线收发器74ls646 八位总线收发器,寄存器74ls647 八位总线收发器,寄存器74ls648 八位总线收发器,寄存器74ls649 八位总线收发器,寄存器74ls651 三态反相8总线收发器74ls652 三态反相8总线收发器74ls653 反相8总线收发器,集电极开路74ls654 同相8总线收发器,集电极开路74ls668 4位同步加/减十进制计数器74ls669 带先行进位的4位同步二进制可逆计数器74ls670 4*4寄存器堆(三态)74ls671 带输出寄存的四位并入并出移位寄存器74ls672 带输出寄存的四位并入并出移位寄存器74ls673 16位并行输出存储器,16位串入串出移位寄存器74ls674 16位并行输入串行输出移位寄存器74ls681 4位并行二进制累加器74ls682 8位数值比较器(图腾柱输出)74ls683 8位数值比较器(集电极开路)74ls684 8位数值比较器(图腾柱输出) 74ls685 8位数值比较器(集电极开路)74ls686 8位数值比较器(图腾柱输出)74ls687 8位数值比较器(集电极开路)74ls688 8位数字比较器(oc输出) 74ls689 8位数字比较器74ls690 同步十进制计数器/寄存器(带数选,三态输出,直接清除) 74ls691 计数器/寄存器(带多转换,三态输出)74ls692 同步十进制计数器(带预置输入,同步清除)74ls693 计数器/寄存器(带多转换,三态输出)74ls696 同步加/减十进制计数器/寄存器(带数选,三态输出,直接清除)74ls697 计数器/寄存器(带多转换,三态输出)74ls698 计数器/寄存器(带多转换,三态输出)74ls699 计数器/寄存器(带多转换,三态输出)74ls716 可编程模n十进制计数器74ls718 可编程模n十进制计数器LM12瓦运算放大器LM124 LM224 LM324 LM2902 低电压双路运算放大器LM324 低电压双路运算放大器LM129 LM329 精密电压基准芯片LM135 LM235 LM335 精密温度传感器芯片LM1458 LM1558 双运算放大器LM158 LM258 LM358 LM2904 低压双运算放大器LM18293 四通道推拉驱动器LM1868 调幅/调频收音机芯片LM1951 1安培固态开关LM2574 降阶式电压调节器LM1575 LM2575 1A 降阶式电压调节器LM2576 3A 3A 降阶式电压调节器LM1577 LM2577 降阶式电压调节器LM2587 5A 返馈开关式电压调节器LM1893 LM2893 载体电流收发器LM193 LM293 LM393 LM2903 双路低压低漂移比较器LM2907 LM2917 频率电压转换器LM101A LM201A LM301A 运算放大器芯片LM3045 LM3046 LM3086 晶体管阵列LM111 LM211 LM311 电压比较器LM117 LM317 三端可调式稳压器LM118 LM218 LM318 运算放大器LM133 LM333安培可调负电压调节器LM137 LM337 可调式三端负压稳压器LM34 精密华氏温度传感器LM342 三端正压稳压器LM148 LM248 LM348 / LM149 LM349 双LM741运算放大器LM35 精密摄氏温度传感器LM158 LM258 LM358 LM2904 低压双运算放大器LM150 LM350 3安培可调式电压调节器LM380 瓦音频放大器LM386 低压音频功率放大器LM3886 高性能68瓦音频功率放大器/带静音LM555 LM555C 时基发生器电路LM556 LM556C 双时基发生器电路LM565 相位跟随器LM567 音频译码器LM621 无刷电机换向器LM628 LM629精密位移控制器LM675功率运算放大器LM723 电压调节器LM741 运算放大器LM7805 LM78xx 系列稳压器LM7812 LM78xx 系列稳压器LM7815 LM78xx 系列稳压器LM78L00 三端正压调节器LM78L05 三端正压调节器LM78L09三端正压调节器LM78L12三端正压调节器LM78L15 三端正压调节器LM78L62 三端正压调节器LM78L82 三端正压调节器LM340 LM78Mxx 三端正压稳压器LM7905 三端负压调节器LM7912 三端负压调节器LM7915 三端负压调节器LM79Mxx三端负压调节器LF147 LF347 宽带J型场效应输入运算放大器LF351 宽带J型场效应输入运算放大器LF353 宽带J型场效应输入运算放大器LF444 双低压J型场效应输入运算放大器(1) 74LS00双输入四与非门，管脚图如附图1-27所示。
雅思为各位考生推荐复习材料-剑桥雅思6阅读Test4 PASSAGE 1的译文,对本单元其他译文有兴趣的考生，请点击：剑桥雅思6Test 3 Pessage1原文参考译文；剑桥雅思6 Test 3 Pessage2 参考译文：在逆境中激励员工挑战。
剑桥雅思6Test4阅读原文+参考译文PASSAGE 1：Doctoring salesPharmaceuticals is one of the most profitable industries in North America. But do the drugs industry’s sales and marketing strategies go too far医药营销制药业是北美地区利润最大的行业之一。
但是制药业的销售和市场策略是否太过火了A A few months ago Kim Schaefer, sales representative of a major global pharmaceutical company, walked into a medical center in New York to bring information and free samples of her company’s latest products. That day she was lucky — a doctor was available to see her. ‘The last rep offered me a trip to Florida. What do you have’the physician asked. He was only half joking.A 几个月前，Kim Schaefer，一家全球主要制药公司的销售代表，带着公司新药的资料和免费试用品走进了纽约的一家医疗中心。
那天，她非常幸运地见到了一位医生。
“上一位销售代表给我提供了一趟到佛罗里达的旅行，你能提供什么呢”医生这样半开玩笑地问道。
|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|的最小值|x-1|的最小值|x-1|+|x-2|的最小值|x-1|+|x-2|+|x-3|的最小值|x-1|+|x-2|+|x-3|+|x-4|的最小值|x-1|+|x-2|+|x-3|+|x-4|+|x-5|的最小值|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|的最小值|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|的最小值|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|的最小值|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|的最小值|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|的最小值【分析】：结合上几篇博文内容我们知道|x-1|的几何意义是数轴上数x到1之间的距离|x-1|+|x-2|的几何意义是数轴上数x到1的距离与数x到2之间距离的和|x-1|+|x-2|+|x-3|的几何意义是数轴上数x分别到1、2、3之间距离的和|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|的几何意义是数轴上数x分别到1、2、3、4、5、6、7、8、9、10之间距离的和根据以上几篇博文的化简我们知道当x=1时，|x-1|有最小值是0当1≤x≤2时，|x-1|+|x-2|的最小值是1等价于数1和数2之间的距离2-1=1当x=2时，|x-1|+|x-2|+|x-3|的最小值是2等价于数1和数3之间的距离3-1=2当2≤x≤3时，|x-1|+|x-2|+|x-3|+|x-4|的最小值是4 等价于求（|x-1|+|x-4|）+|（x-2|+|x-3|）的最小值即（|x-1|+|x-4|）的最小值+|（x-2|+|x-3|）的最小值=（4-1）+（3-2）=3+1=4我们可以总结出若含有奇数个绝对值时，处于中间的零点值可以使代数式取最小值若含有偶数个绝对值时，处于中间2个零点值之间的任意一个数（包含零点值）都可以使代数式取最小值或者说将含有多个绝对值的代数式用捆绑法求最值也可以若想求出最小值可以求关键点即可求出【解】：当x=1时，|x-1|的最小值是0当1≤x≤2时，|x-1|+|x-2|的最小值1当x=2时，|x-1|+|x-2|+|x-3|的最小值2=2+0当2≤x≤3时，|x-1|+|x-2|+|x-3|+|x-4|的最小值4=3+1当x=3时，|x-1|+|x-2|+|x-3|+|x-4|+|x-5|的最小值6=4+2当3≤x≤4时，|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|的最小值9=5+3+1当x=4时，|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|的最小值12=6+4+2当4≤x≤5时，|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|的最小值16=7+5+3+1 当x=5时，|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|的最小值20=8+6+4+2当5≤x≤6时，|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|的最小值25=9+7+5+3+1【解法2】：捆绑法|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|=（|x-1|+|x-10|）+（|x-2+|x-9|）+（|x-3|+|x-8|）+（|x-4|+|x-7|）+（|x-5|+|x-6|）若|x-1|+|x-10|的和最小，可知x在数1和数10之间|x-2+|x-9|的和最小，可知数x在数2和数9之间|x-3|+|x-8|的和最小，可知数x在数3和数8之间|x-4|+|x-7|的和最小，可知数x在数4和数7之间|x-5|+|x-6|的和最小，可知数x在数5和数6之间∴若想满足以上和都最小，数x应该在数5和数6之间的任意一个数（含数5和数6）都可以反思：这就好比我们做个游戏，若有10个人一次排开，小明应该站在什么位置，使得小明分别到10个人的距离和最小的问题可知小明站在第1个人和第10个人之间的任意一个位置，小明到第一个人的距离与到第10个人的距离和都是第一个人与第10个人之间的距离是不变的同理：小明站在第2个人和第9个人之间的任意一个位置，小明到第2个人和到第9个人的距离和也是不变的是第2个人和第9个人之间的距离为了满足以上两点小明应该站在第2个人和第9个人之间才可以使得小明分别到第1个、第2个、第9个、第10个人的距离和最小，也就相等于说小明应该往中间位置站最合适。
