下载文档原格式
2-丁酮∙WinID：01NX∙中文名称：2-丁酮∙英文名称：2-Butanone∙别名名称：甲乙酮甲基丙酮甲基乙基酮乙基甲基甲酮丁酮∙更多别名：Methyl ethyl ketone Methyl acetone Ethyl methyl ketone 2-Ketobutane ∙分子式：C4H8O∙分子量：72.11目录1.编号系统2.物性数据3.毒理学数据4.生态学数据5.分子结构数据6.计算化学数据7.性质与稳定性8.贮存方法9.合成方法10.用途11.安全信息12.表征图谱更多编号系统CAS号：78-93-3MDL号：MFCD00011648EINECS号：201-159-0RTECS号：EL6475000BRN号：741880PubChem号：24872423物性数据1.性状：无色液体，有似丙酮的气味。
[1]2.熔点（℃）：-85.9[2]3.沸点（℃）：79.6[3]4.相对密度（水=1）：0.81[4]5.相对蒸气密度（空气=1）：2.42[5]6.饱和蒸气压（kPa）：10.5（20℃）[6]7.燃烧热（kJ/mol）：-2261.7[7]8.临界温度（℃）：262.5[8]9.临界压力（MPa）：4.15[9]10.辛醇/水分配系数：0.29[10]11.闪点（℃）：-9（CC）[11]12.引燃温度（℃）：404[12]13.爆炸上限（%）：11.5[13]14.爆炸下限（%）：1.8[14]15.溶解性：溶于水、乙醇、乙醚、丙酮、苯，可混溶于油类。
[15]16.相对密度（g/mL,20/4ºC）：0.804917.相对密度（g/mL,25/4ºC）：0.799718.折射率（n20ºC）：1.378819.折射率（n25ºC）：1.376420.黏度（mPa·s,25ºC）：0.42321.黏度（mPa·s,30ºC）：0.36522.闪点（ºC,闭口）：-7.223.闪点（ºC,开口）：1.6724.燃点（ºC）：51625.蒸发热（J/mol,b.p.）：23.326.熔化热（KJ/mol）：8.427.生成热（KJ/mol）：279.228.比热容（KJ/(kg·K),定压）：2.29729.电导率（S/m）：3.6×10-930.体膨胀系数（K-1,0~80ºC）：0.0014231.体膨胀系数（K-1,0~30ºC）：0.0012932.临界密度（g/mL）：0.27033.临界体积（cm3·mol-1）：26734.临界压缩因子：0.25235.偏心因子：0.32436.Lennard-Jones参数（A）：14.4937.Lennard-Jones参数（K）：145.938.溶度参数(J·cm-3)0.5：18.79639.van der Waals面积（cm2·mol-1）：7.910×10940.van der Waals体积（cm3·mol-1）：49.27041.气相标准燃烧热(焓)(kJ·mol-1)：-2478.642.气相标准声称热(焓)( kJ·mol-1) ：-238.743.气相标准熵(J·mol-1·K-1) ：339.4744.气相标准生成自由能( kJ·mol-1)：-146.645.气相标准热熔(J·mol-1·K-1)：103.2646.液相标准燃烧热(焓)(kJ·mol-1)：-2444.147.液相标准声称热(焓)( kJ·mol-1)：-273.348.液相标准熵(J·mol-1·K-1) ：239.049.液相标准生成自由能( kJ·mol-1)：-151.450.液相标准热熔(J·mol-1·K-1)：158.9毒理学数据1.急性毒性[16]LD50：2737mg/kg（大鼠经口）；6480mg/kg（兔经皮）LC50：23500mg/m3（大鼠吸入，8h）2.刺激性[17]家兔经皮：13780μg（24h），轻度刺激（开放性刺激试验）家兔经眼：80mg，引起刺激。
USER'S MANUALRevision 1.0AOC-S25G6-M2SThe information in this user’s manual has been carefully reviewed and is believed to be accurate. The manufacturer assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the information in this manual, or to notify any person or organization of the updates. Please Note: For the most up-to-date version of this manual, please see our website at .Super Micro Computer, Inc. ("Supermicro") reserves the right to make changes to the product described in this manual at any time and without notice. This product, including software and documentation, is the property of Supermicro and/ or its licensors, and is supplied only under a license. Any use or reproduction of this product is not allowed, except as expressly permitted by the terms of said license.IN NO EVENT WILL Super Micro Computer, Inc. BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, SPECULATIVE OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OR INABILITY TO USE THIS PRODUCT OR DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN PARTICULAR, SUPER MICRO COMPUTER, INC. SHALL NOT HAVE LIABILITY FOR ANY HARDWARE, SOFTWARE, OR DATA STORED OR USED WITH THE PRODUCT, INCLUDING THE COSTS OF REPAIRING, REPLACING, INTEGRATING, INSTALLING OR RECOVERING SUCH HARDWARE, SOFTWARE, OR DATA.Any disputes arising between manufacturer and customer shall be governed by the laws of Santa Clara County in the State of California, USA. The State of California, County of Santa Clara shall be the exclusive venue for the resolution of any such disputes. Supermicro's total liability for all claims will not exceed the price paid for the hardware product. FCC Statement: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in industrial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the manufacturer’s instruction manual, may cause harmful interference with radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case you will be required to correct the interference at your own expense.California Best Management Practices Regulations for Perchlorate Materials: This Perchlorate warning applies only to products containing CR (Manganese Dioxide) Lithium coin cells. “Perchlorate Material-special handling may apply. See /hazardouswaste/perchlorate”.The products sold by Supermicro are not intended for and will not be used in life support systems, medical equipment, nuclear facilities or systems, aircraft, aircraft devices, aircraft/emergency communication devices or other critical systems whose failure to perform be reasonably expected to result in significant injury or loss of life or catastrophic property damage. Accordingly, Supermicro disclaims any and all liability, and should buyer use or sell such products for use in such ultra-hazardous applications, it does so entirely at its own risk. Furthermore, buyer agrees to fully indemnify, defend and hold Supermicro harmless for and against any and all claims, demands, actions, litigation, and proceedings of any kind arising out of or related to such ultra-hazardous use or sale.Manual Revision 1.0Release Date: April 19, 2023Unless you request and receive written permission from Super Micro Computer, Inc., you may not copy any part of this document. Information in this document is subject to change without notice. Other products and companies referred to herein are trademarks or registered trademarks ofW their respective companies or mark holders.Copyright © 2023 by Super Micro Computer, Inc.All rights reserved.Printed in the United States of AmericaPrefacePrefaceAbout This ManualThis user's guide is written for system integrators, IT professionals, and knowledgeable end users. It provides information for the installation and use of the AOC-S25G6-M2S add-on card. About This Add-On CardThe Supermicro® AOC-S25G6-M2S add-on card provides a PCIe Gen 4 Ethernet solution based on the low-power consumption NVIDIA® ConnectX-6 Lx controller with advanced feature enhancements, including VXLAN, NVGRE, and RDMA. It is a feature-rich adapter that offers unparalleled performance and functionality to your cloud service, telecommunication applications, and enterprise data-center deployments. Supermicro systems with integrated asset management features are the most versatile 25GbE solution in the market. To order, contact your distributor as this product is only available through Supermicro.An Important Note to the UserAll graphic images and layout drawings shown in this user's guide are based upon the latest PCB revision available at the time of publishing of this user's guide. The add-on card you have received may or may not look exactly the same as the graphics shown in this user's guide. An Important Note to the UserA receipt or copy of your invoice marked with the date of purchase is required before anywarranty service will be rendered. You can obtain service by calling your vendor for a Returned Merchandise Authorization (RMA) number. When returning to the manufacturer, the RMA number should be prominently displayed on the outside of the shipping carton and mailed prepaid or hand-carried. Shipping and handling charges will be applied for all orders that must be mailed when service is complete. For faster service, RMA authorizations may be requested online (/support/rma/).This warranty only covers normal consumer use and does not cover damages incurred in shipping or from failure due to the alteration, misuse, abuse or improper maintenance of products.During the warranty period, contact your distributor first for any product problems.Note: Additional information given to differentiate various models or to provide in-formation for proper system setup.Super AOC-S25G6-M2S User's ManualConventions Used in the ManualSpecial attention should be given to the following symbols for proper installation and to preventdamage done to the components or injury.Warning! Indicates high voltage may be encountered while performing a procedure.Warning! Indicates important information given to prevent equipment/property damageor personal injury.Important: Important information given to ensure proper system installation or to relay safety precautions.Important LinksFor your system to work properly, please follow the links below to download all necessary drivers/utilities and the user’s manual for your server.• Supermicro product manuals: /support/manuals/• Product drivers and utilities: ftp://• Product safety info: /about/policies/safety_information.cfm • If you have any questions, please contact our support team at: ********************** This manual may be periodically updated without notice. Please check the Supermicro website for possible updates to the manual revision level.Preface Naming ConventionSuper AOC-S25G6-M2S User's ManualContacting SupermicroHeadquartersAddress:Super Micro Computer, Inc.980 Rock Ave.San Jose, CA 95131 U.S.A.Tel:+1 (408) 503-8000Fax:+1 (408) 503-8008Email:************************(GeneralInformation)************************(SalesInquiries)***********************************(Gov.SalesInquiries)**********************(TechnicalSupport)******************(RMASupport)************************(Webmaster)Website:EuropeAddress:Super Micro Computer B.V.Het Sterrenbeeld 28, 5215 ML's-Hertogenbosch, The NetherlandsTel:+31 (0) 73-6400390Fax:+31 (0) 73-6416525Email:***************************(SalesInquiries)Support_Europe@supermicro (Technical Support)RMA_Europe@supermicro (RMA Support)Website:www.supermicro.nlAsia-PacificAddress:Super Micro Computer, Inc.3F, No. 150, Jian 1st Rd.Zhonghe Dist., New Taipei City 235Taiwan (R.O.C)Tel:+886-(2) 8226-3990Fax:+886-(2) 8226-3992PrefaceAsia-PacificEmail:*************************.tw(SalesInquiries)**********************.tw(TechnicalSupport)******************.tw(RMASupport)Website:Super AOC-S25G6-M2S User's ManualTable of ContentsChapter 1 Introduction1.1 Overview (9)1.2 Key Features (9)Chapter 2 Hardware Components2.1 Add-On Card Image and Layout (12)2.2 Major Components (14)2.3 Ports (15)2.4 SFP28 Ethernet Connections (16)2.5 NC-SI Header (17)2.6 Jumpers (18)Chapter 3 Installation3.1 Major Components (19)3.2 Before Installation (20)3.3 Installing the Add-on Card (20)3.4 Installing Drivers for Windows (21)3.5 Installing Drivers (NVIDIA® ConnectX-6 Lx) (22)Chapter 1: IntroductionChapter 1Introduction1.1 OverviewCongratulations on purchasing your add-on card from an acknowledged leader in the industry.Supermicro products are designed with the utmost attention to detail to provide you the highest standards in quality and performance.1.2 Key FeaturesThe key features of this add-on card include the following.• NVIDIA ConnectX-6 Lx 25GbE controller• Support for 25GbE and 10GbE Speed• Dual SFP28 connectors• RDMA over Converged Ethernet• VXLAN, NVGRE, and Geneve• Asset Management Features with thermal sensor• Network Controller Sideband Interface (NC-SI) for Remote ManagementGeneral• NVIDIA ConnectX-6 Lx 25GbE controller• Dual SFP28 portsStorage Accelerations• NVMe over Fabric offloads for target• Storage protocols: iSER, NFSoRDMA,• SMB Direct, NVMe-oF, and moreSuper AOC-S25G6-M2S User's ManualRDMA over Converged Ethernet• RoCE v1/v2• Zero-Touch RoCE: no ECN, no PFC• RoCE over overlay networks• IPsec over RoCE• Selective repeat• GPUDirect®• Dynamically Connected Transport (DCT)• Burst buffer offloadManagement and Control• Network Controller Sideband Interface (NC-SI)• NC-SI, MCTP over SMBus, and MCTP over PCIe – Baseboard Management Controller interface• PLDM for Monitor and Control DSP0248• PLDM for Firmware Update DSP026Remote Boot• Remote boot over Ethernet• Remote boot over iSCSI• UEFI support for x86 and ARM servers• PXE bootStandards• IEEE 802.3ae 10 Gigabit Ethernet• IEEE 802.3by 25G supporting all FEC modes• IEEE 802.3ad, 802.1AX Link AggregationChapter 1: Introduction• IEEE 802.3az Energy Efficient Ethernet (supports only “Fast-Wake” mode)• IEEE 802.3ap based auto-negotiation and KR startup• IEEE 802.1Q, 802.1P VLAN tags and priority• IEEE 802.1Qaz (ETS)• IEEE 802.1Qbb (PFC)• IEEE 802.1Qbg• IEEE 1588v2• IEEE 1149.1 and IEEE 1149.6 JTAG• PCI-E 3.0 and 4.0Power Consumptions• Maximum power consumption: 15WOperating Conditions• Storage temperature: -40°C to 70°C (-40°F to 158°F)• Storage humidity: 90% non-condensing relative humidity at 35°C (95°F)Physical Dimensions• PCB dimensions: 5.600 inches (L) x 2.712 inches (W)Super AOC-S25G6-M2S User's ManualChapter 2Hardware Components 2.1 Add-On Card Image and LayoutAOC-S25G6-M2S ViewChapter 2: Hardware ComponentsAOC-S25G6-M2S LayoutSuper AOC-S25G6-M2S User's Manual2.2 Major ComponentsThe following major components are installed on the AOC-S25G6-M2S:Chapter 2: Hardware Components2.3 PortsThere are two SFP28 connector ports (LAN0 and LAN1) located on the AOC-S25G6-M2S add-on card. Connect a Direct Attach Copper Twin Axial cable or an LC fiber-optic cable to the ports to provide Gigabit Ethernet communication. Refer to the add-on card layout on page13 for the locations of the ports.Super AOC-S25G6-M2S User's Manual2.4 SFP28 Ethernet ConnectionsSFP28 ConnectorsTwo small form-factor pluggable (SFP28) optical transceiver connectors (SFP1/SFP2) are located on the add-on card. These SFP28 ports provide Ethernet 10GbE/25GbE network connections. See the layout below for the locations.SFP28 Link/Activity LED IndicatorsTwo LAN Link/Activity LED indicators are located at LED1 and LED2 on the add-on card.LED1 is used for the LAN0 connector, and LED2 is used for the for LAN1 connector. See the tables below for the LED states.Chapter 2: Hardware Components2.5 NC-SI HeaderA Network-Controller Sideband Interface (NC-SI) header is located at JNCSI1 on the add-oncard. Connect an appropriate cable from this header to a motherboard to provide the out-of-band (sideband) connection between the onboard Baseboard Management Controller (BMC) and a Network Interface Controller (NIC) for remote management. For the network sideband interface to work properly, you will need to use a motherboard that supports NCSI and also need to have a special cable. Please contact Supermicro at to purchase the cable for this header. See the layout below for the location of the JNCSI1 header.Super AOC-S25G6-M2S User's Manual2.6 JumpersTo modify the operation of the add-on card, a jumper can be used to choose between optional settings. A jumper creates shorts between two pins to change the function of the connector.See the add-on card layouts on page 13 for the jumper locations. If the standby power is disabled, the available system IPMI shared LAN/failover support will be turned/powered on.AOC-S25G6-M2S does not support WoL.Note: On two-pin jumpers, "Closed" means the jumper is on and "Open" means thejumper is off the pins.Chapter 3: InstallationChapter 3InstallationYour system came with the AOC-S25G6-M2S add-on card to be used as a part of an integrated solution. We do not recommend that any part of your system components be removed and reinstalled. However, if you do need to remove or reinstall a system component, including this add-on card, please follow the instructions below to ensure proper system setup. Also, be sure to remove the power cord first before adding, removing, or changing any hardware components to avoid damaging the system or components.3.1 Major ComponentsElectrostatic Discharge (ESD) can damage electronic com p onents. To avoid damaging your add-on card, it is important to handle it very carefully. The following measures are generally sufficient to protect your equipment from ESD.Precautions• Use a grounded wrist strap designed to prevent static discharge.• Touch a grounded metal object before removing the add-on card from the antistatic bag.• Handle the add-on card by its edges only; do not touch its components or peripheral chips.• Put the add-on card back into the antistatic bags when not in use.• For grounding purposes, make sure that your system chassis provides excellent conduc-tivity between the power supply, the case, the mounting fasteners, and the add-on card.UnpackingThe add-on card is shipped in antistatic packaging to avoid static damage. When unpacking your component or system, make sure you are static protected.Note: To avoid damaging your components and to ensure proper installation, alwaysconnect the power cord last, and always unplug it before adding, removing, or chang-ing any hardware components.Super AOC-S25G6-M2S User's Manual3.2 Before InstallationTo install the add-on card properly, be sure to follow the instructions below.1. Power down the system.2. Remove the power cord from the wall socket.3. Use industry-standard anti-static equipment (such as gloves or wrist strap) and followthe instructions listed on page 3-1 to avoid damage caused by ESD.4. Familiarize yourself with the server, motherboard, and/or chassis documentation.5. Confirm that your operating system includes the latest updates and hot fixes.3.3 Installing the Add-on CardFollow the steps below to install the add-on card into your system.1. Remove the server cover and, if necessary, set aside any screws for later use.2. Remove the add-on card slot cover. If the case requires a screw, place the screw asidefor later use.3. Position the add-on card in the slot directly over the connector on the motherboard, andgently push down on both sides of the card until it slides into the PCI connector.4. Secure the add-on card/motherboard to the chassis. If required, use the screw that youpreviously removed.5. Attach any necessary external cables to the add-on card.6. Replace the chassis cover.7. Plug the power cord into the wall socket, and power up the system.Chapter 3: Installation3.4 Installing Drivers for WindowsFollow the steps below to install the drivers needed for your Windows OS support. The controller comes with a driver on the CD-ROM CDR-NIC.1. Run the CDR-NIC. (If you do not have a product CD-ROM, download drivers from theSupermicro Support Website and then transfer them to your system.)2. When the SUPERMICRO window appears, click on the computer icon next to theproduct model.Note: If the FOUND NEW HARDWARE WIZARD screen displays on your system, click CANCEL.3. Click on INSTALL DRIVERS AND SOFTWARE.4. Follow the prompts to complete the installation.Super AOC-S25G6-M2S User's Manual3.5 Installing Drivers (NVIDIA® ConnectX-6 Lx)Use the procedures below to install the driver for the AOC-S25G6-M2S add-on card on both Linux and Windows.Linux Drivers1. Use the following procedures to install the 25GbE driver on the Linux operating system.2. We recommend downloading the latest Nvidia Driver directly from the Nvidia website:https:///products/infiniband-drivers/linux/mlnx_ofed/.3. Download and extract /untar from the Nvidia Linux OFED.tgz package.4. Change to the appropriate directory where your newly extracted package is located.5. Install the driver by entering the following command:./mlnxofedinstall --without-fw-updateThis installs the Linux drivers to your system. You might be prompted to install kernel dependencies for Linux, in which case you would need to follow on-screen instructions.Windows DriversUse the following procedures to install a 25GbE driver on the Windows operating system.1. We recommend that you download the latest Nvidia Driver directly from the Nvidiawebsite: https:///products/adapter-software/ethernet/windows/winof-2/.2. Once the driver is downloaded, run the .exe file to install the driver(Disclaimer Continued)The products sold by Supermicro are not intended for and will not be used in life support systems, medical equipment, nuclear facilities or systems, aircraft, aircraft devices, aircraft/emergency com-munication devices or other critical systems whose failure to perform be reasonably expected to result in significant injury or loss of life or catastrophic property damage. Accordingly, Supermicro disclaims any and all liability, and should buyer use or sell such products for use in such ultra-hazardous ap-plications, it does so entirely at its own risk. Furthermore, buyer agrees to fully indemnify, defend and hold Supermicro harmless for and against any and all claims, demands, actions, litigation, and proceedings of any kind arising out of or related to such ultra-hazardous use or sale.。
希尔思中文操作手册S505露点仪（手持式）深圳市君达时代仪器有限公司尊敬的客户：感谢您选择我们的产品。
用户须在启动设备前完整阅读该操作手册并认真遵守。
对于因未仔细查看或者未遵守此操作手册规定而造成的任何损失，制造商概不负责。
如果用户违反此操作手册所描述或规定的方式，擅自改动设备，仪器保修将自动失效并且制造商免除责任。
请按照此操作手册说明的专业用途使用该设备。
对于该设备在未描述用途上的适用性，希尔思公司不做任何保证。
由于运输、设备性能或使用造成的间接损失，希尔思公司不承担责任。
目录1 安全说明 (4)2 注册商标声明 (5)3 应用 (6)4 特点 (6)5 技术参数 (7)5.1 常规 (7)5.2 电气参数 (7)5.3 精度 (8)6 尺寸图 (9)7 确定安装点 (10)7.1 安装步骤 (10)7.2 电气连接 (12)8 操作 (13)8.1 按钮和连接器 (13)8.2 屏幕上的符号 (14)8.3 主界面 (15)8.4 基本操作 (15)8.5 数据记录 (16)8.6 文件菜单 (17)8.7 打印菜单 (17)8.8 蓝牙菜单 (17)9 应用软件 (18)9.1 S4A (18)9.2 S4C-Handheld (18)10 可选配件 (18)10.1 便携式蓝牙打印机CS2 (18)10.1.1 安装打印纸 (19)10.1.2 基本操作 (19)10.2 待机测量室 (21)10.2.1 标准待机测量室(A699 3500) (21)10.2.2 旁通式待机测量室(A699 3501) (21)10.3 SD卡 (4G) (21)11 校准 (22)11.1 露点校准 (22)11.2 压力校准 (23)12 维护 (23)13 废弃物的处置 (24)14 保修 (24)安全说明1 安全说明请检查此操作手册和产品类型是否匹配。
请查看此手册中包含的所有备注和说明。
手册中包含了前期准备和安装、操作及维护各个阶段需要查看的重要信息。
25日的英文翻译我们在25日出来郊游，但是吃完饭之后，爷爷居然拿起写字板教我们写英语单词。
下面是店铺给大家整理的25日的英文翻译，供大家参阅!25日的英文翻译twenty-fifth25日twenty-fifth的英语例句1. Elections will now take place on November the twenty-fifth.选举现定于11月25号举行。
2. My parents are going to celebrate their twenty - fifth wedding anniversary.我父母要庆祝他们的第二十五个结婚纪念日.3. Hearn conceded on the twenty - fifth move.赫恩走到第二十五步,终于认了输.4. Late in 1934 the Twenty - fifth Red Army, under Hsu Hai - tung , left Honan with 8,000 men.一九三四年末,红二十五军八千人在徐海东率领下离开河南.5. It is to be on the twenty - fifth of next month, if you don't object.如果你没有什么不赞成的, 那我们就下月二十五号办事了.6. Broad waste of peaceful sea separated the three massive fights on the twenty fifth.浩瀚而宁静的大海将二十五日那三场大战彼此分隔开了.7. The weekend of my aunt and uncle's twenty - fifth wedding anniversary approached.我姨父母结婚25周年纪念日的那个周末快要到了.8. The twenty - fifth of December.十二月二十五日.9. It is my parents twenty - fifth wedding anniversary today.今天是我父母结婚25周年纪念日.10. So the twenty - third to the twenty - fifth of December.那就是从十二月二十三日到二十五日.11. It was an unusually quiet day in the emergency room on December twenty - fifth.12月25日,急诊室在那天是非同寻常的宁静.12. This year is the twenty - fifth anniversary of Elvis Presley's death on August sixteenth, 1977.今年是猫王在1977年8月16日去世的第25周年.13. Yes, Mr. Cohen. I will show you the twenty - second floor and twenty - fifth floor. We can go anytime.是的, 高汉先生, 我会介绍二十二楼及二十五缕给你. 我们可以随时出发.14. So the wall was completed on the twenty - fifth of Elul, in fifty - two days.15[和合]以禄月二十五日,城墙修完了, 共修了五十二天.15. What s a suitable present for a couple celebrating their twenty - fifth wedding anniversary?什么礼物送给一对庆祝结婚25周年纪念的夫妇最合适?25条唯美英语句子1、To the world you may be one person, but to one person you may be the world.对于世界而言，你是一个人;但是对于某个人，你是他的整个世界。
欧洲联盟危险性符号、R术语和S术语说明欧洲联盟危险性符号：根据欧洲联盟危险化学品立法规定，化学品的包装标签上必须标示出对人类最重要的危险性符号（dangerous symbols）。
这些危险符号应以黑体字印刷在澄红色背景上，各种危险性符号的含义如下：E符号：爆炸性物品； O符号：氧化性物品； F符号：高度易燃物品；F+符号：极易燃物品； T符号：有毒物品； T+符号：极高毒性物品；C符号：腐蚀性物品； Xi符号：刺激性物品； Xn符号：有害物品；N符号：环境危险物品。
风险术语（R术语）和安全术语（S术语）：除了上述危险性符号之外，根据欧盟有关规定，危险化学品包装标签上还需要标示出风险术语（R术语）和安全术语（S术语）。
R术语表示化学物质使用中产生的特别风险的性质（the nature of special risks）。
S术语表示安全预防措施建议（the recommended safety precautions）。
R术语和S术语由一个字母（R或S）和一串数字组成，字母后面的数字表示具体类型，字母与数字之间的“－”连字符号表示对特别风险（R）或安全预防措施建议（S）的单独说明。
字母与数字之间的“/”斜杠符号表示以一句话对特别风险（R）或安全预防措施建议作综合说明。
有时候标签上还应注上各种规定的风险标记（Risk Note），如“标记：A”、“标记：B” 等。
卡片中出现的R术语、S术语的含义如下:R1 干燥时有爆炸性； R2 受冲击、摩擦、着火或其他引燃源有爆炸危险；R3 受冲击、摩擦、着火或其他引燃源有极高爆炸危险；R4 生成极敏感的爆炸性金属化合物； R5 受热可能引起爆炸；R6 与空气或未与空气接触发生爆炸； R7 可能引起火灾；R8 与可燃物料接触可能引起火灾； R9 与可燃物料混合时发生爆炸；R10 易燃的； R11 高度易燃的；R12 极易燃的； R13 极易燃液化气体；R14 与水猛烈反应； R14/15 与水猛烈反应，释放出极易燃气体；R15 与水接触释放出极易燃气体； R15/29 与水接触释放出有毒的，极易燃气体；R16 与氧化性物质混合时发生爆炸； R17 在空气中易自燃；R18 使用中可能形成易燃/爆炸性蒸气空气混合物；R19 可能生成爆炸性过氧化物； R20 吸入有害；R20/21 吸入和与皮肤接触是有害的； R20/21/22 吸入、与皮肤接触和吞食是有害的；R20/22 吸入和吞食是有害的； R21 与皮肤接触是有害的；R22 吞食是有害的； R23 吸入有害；R23/24 吸入和与皮肤接触是有毒的； R23/24/25 吸入、与皮肤接触和吞食是有毒的；R23/25 吸入和吞食是有毒的； R24 与皮肤接触有毒；R24/25 与皮肤接触和吞食是有毒的； R25 吞食有毒；R26 吸入有极高毒性； R26/27 吸入和与皮肤接触有极高毒性；R26/27/28 吸入、与皮肤接触和吞食有极高毒性；R26/28 吸入和吞食有极高毒性； R27 与皮肤接触有极高毒性；R27/28 与皮肤接触和吞食有极高毒性； R28 吞食有极高毒性；R29 与水接触释放出有毒气体； R30 使用会变为高度易燃的；R31 与酸接触释放出有毒气体； R32 与酸接触释放出极高毒性气体；R33 有累积作用危险； R34 引起灼伤；R35 引起严重灼伤； R36 刺激眼睛；36/37 刺激眼睛和呼吸系统； R36/37/38 刺激眼睛、呼吸系统和皮肤；R36/38 刺激眼睛和皮肤； R37 刺激呼吸系统；R37/38 刺激呼吸系统和皮肤； R38 刺激皮肤；R39 有极严重不可逆作用危险； R39/23 有毒的：经吸入有极严重不可逆作用危险；R39/23/24 有毒的：经吸入和与皮肤接触有极严重不可逆作用危险；R39/23/24/25 有毒的：经吸入、与皮肤接触和吞食有极严重不可逆作用危险；R39/23/25 有毒的：经吸入和吞食有极严重不可逆作用危险；R39/24 有毒的：与皮肤接触有极严重不可逆作用危险；R39/24/25 有毒的：与皮肤接触和吞食有极严重不可逆作用危险；R39/25 有毒的：吞食有极严重不可逆作用危险；R39/26 极高毒性：经吸入有极严重不可逆作用危险；R39/26/27 极高毒性：经吸入和与皮肤接触有极严重不可逆作用危险；R39/26/27/28 极高毒性：经吸入、与皮肤接触和吞食有极严重不可逆作用危险；R39/26/28 极高毒性：经吸入和吞食有极严重不可逆作用危险；R39/27 极高毒性：与皮肤接触有极严重不可逆作用危险；R39/27/28 极高毒性：与皮肤接触和吞食有极严重不可逆作用危险；R39/28 极高毒性：吞食有极严重不可逆作用危险；R40 可能有不可逆作用的风险；R40/20 有害的：经吸入可能有不可逆作用的风险；R40/20/21 有害的：经吸入和与皮肤接触可能有不可逆作用的风险；R40/20/21/22 有害的：经吸入、与皮肤接触和吞食可能有不可逆作用的风险；R40/20/22 有害的：经吸入和吞食可能有不可逆作用的风险；R40/21 有害的：与皮肤接触可能有不可逆作用的风险；R40/21/22 有害的：与皮肤接触和吞食可能有不可逆作用的风险；R40/22 有害的：吞食可能有不可逆作用的风险；R41 对眼睛有严重损害的风险； R42 吸入可能引起过敏；R42/43 吸入和皮肤接触可能引起过敏； R43 皮肤接触可能引起过敏；R44 在封闭情况下加热有爆炸危险； R45 可能致癌；R46 可能造成不可逆的遗传损害 R47 可能引起出生缺陷；R48 长期接触有严重损害健康的危险；R48/20 有害的：经吸入长期接触有严重损害健康的危险；R48/20/21 有害的：经吸入和与皮肤长期接触有严重损害健康的危险；R48/20/21/22 有害的：经吸入、皮肤和吞食长期接触有严重损害健康的危险；R48/20/22 有害的：经吸入和吞食长期接触有严重损害健康的危险；R48/21 有害的：经皮肤长期接触有严重损害健康的危险；R48/21/22 有害的：经皮肤和吞食长期接触有严重损害健康的危险；R48/22 有害的：吞食长期接触有严重损害健康的危险；R48/23 有毒的：经吸入长期接触有严重损害健康的危险；R48/23/24 有毒的：经吸入和与皮肤长期接触有严重损害健康的危险；R48/23/24/25 有毒的：经吸入、皮肤和吞食长期接触有严重损害健康的危险；R48/23/25 有毒的：经吸入和吞食长期接触有严重损害健康的危险；R48/24 有毒的：经皮肤长期接触有严重损害健康的危险；R48/24/25 有毒的：经皮肤和吞食长期接触有严重损害健康的危险；R48/25 有毒的：吞食长期接触有严重损害健康的危险；R49 吸入可能致癌； R50 对水生生物有极高毒性；R50/53 对水生生物有极高毒性，可能在水生环境中造成长期不利影响；R51 对水生生物是有毒的；R51/53 对水生生物有毒，可能在水生环境中造成长期不利影响；R52 对水生生物是有害的；R52/53 对水生生物有害，可能在水生环境中造成长期不利影响；R53 可能在水生环境中造成长期不利影响； R54 对植物群有毒；R55 对动物群有毒； R56 对土壤中生物有毒；R57 对蜜蜂有毒； R58 可能在环境中造成长期不利影响；R59 对臭氧层有危害； R60 可能损伤生育力；R61 可能对未出生婴儿造成危害； R62 可能有损伤生育力的危险；R63 可能有损害未出生婴儿的危险； R64 可能对哺乳婴儿造成危害；R65 有害的：吞食可能造成肺部损害； R66 反复接触可能造成皮肤发干或裂口；R67 蒸气可能造成倦睡和头晕。
小学语文S版三年级语文25课《古诗两首》——逢雪宿芙蓉山主人语文S版三年级语文上册第七单元小学语文三年级S版25课古诗两首。
旅途遇风雪，夜里投宿在芙蓉山主人的家里。
小学语文三年级S版25课古诗两首。
逢雪宿芙蓉山主人日暮苍山远，天寒白屋贫。
柴门闻犬吠，风雪夜归人。
【唐】刘长卿小学语文三年级S版25课古诗两首。
刘长卿：唐代诗人。
字文房，他的诗善于用简淡的笔触刻画幽静的景色，寄托于孤寂情怀。
擅长写五言诗，他曾经自豪地称自己为“五言长城”。
小学语文三年级S版25课古诗两首。
学习目标：1.学会学习古诗的方法。
2.在感情朗读诗歌的基础上，理解诗歌的意思，想像诗句所描绘的画面，体会诗歌所表达的意境。
小学语文三年级S版25课古诗两首。
自学指导一：语言的品味—诗词美用自己喜欢的方式多读几遍诗歌，把诗歌读流利，然后同桌合作读：一人读，一人闭眼听，听的同学要想像诗句所描绘的画面。
小学语文三年级S版25课古诗两首。
逢雪宿芙蓉山主人这首诗形象生动的描绘了落日、青山、茅屋、柴门、狗叫、风雪、旅人等自然景物和人物内心世界，构成了一幅由暮到夜，由远及近，由静而动，由无声至有声，迷茫凄清的“风雪夜归图”。
小学语文三年级S版25课古诗两首。
逢雪/宿/芙蓉山/主人日暮苍山远，天寒白屋贫。
柴门闻犬吠，风雪夜归人。
【唐】刘长卿小学语文三年级S版25课古诗两首。
自学指导二：语言的品味—节奏美格律诗节奏的划分有一定的规律：四言22(对酒/当歌，人生/几何)、五言23(举头/望/明月，低头/思/故乡)、六言222(朝来/户前/照镜，含笑/盈盈/自看)、七言223(两个/黄鹂/鸣/翠柳，一行/白鹭/上/青天。
窗含/西岭/千秋/雪，门泊/东吴/万里/船).小学语文三年级S版25课古诗两首。
逢雪/宿/芙蓉山/主人日暮/苍山/远，天寒/白屋/贫。
柴门/闻/犬吠，风雪/夜/归人。
【唐】刘长卿小学语文三年级S版25课古诗两首。
自学指导三：情感的感悟—意境美请同学们低声默诵古诗，同时把自己当作旅途遇风雪的旅人，体会一下诗人投宿前和投宿后的心情。
原子序数元素符号元素名称电子排布式电子排布式（原子实表示）原子序数元素符号元素名称电子排布式电子排布式（原子实表示）1H 氢1s131Ga 镓1s22s22p63s23p63d104s24p1[Ar]3d104s24p1 2He 氦1s232Ge 锗1s22s22p63s23p63d104s24p2[Ar]3d104s24p2 3Li 锂1s22s1[He]2s133As 砷1s22s22p63s23p63d104s24p3[Ar]3d104s24p3 4Be 铍1s22s2[He]2s234Se 硒1s22s22p63s23p63d104s24p4[Ar]3d104s24p45 B 硼1s22s22p1[He]2s22p135Br 溴1s22s22p63s23p63d104s24p5[Ar]3d104s24p56 C 碳1s22s22p2[He]2s22p236Kr 氪1s22s22p63s23p63d104s24p6[Ar]3d104s24p6 7N 氮1s22s22p3[He]2s22p337Rb 铷1s22s22p63s23p63d104s24p65s1[Kr]5s18O 氧1s22s22p4[He]2s22p438Sr 锶1s22s22p63s23p63d104s24p65s2[Kr]5s29 F 氟1s22s22p5[He]2s22p539Y 钇1s22s22p63s23p63d104s24p64d15s2[Kr]4d15s210Ne 氖1s22s22p6[He]2s22p640Zr 锆1s22s22p63s23p63d104s24p64d25s2[Kr]4d25s211Na 钠1s22s22p63s1[Ne]3s141Nb 铌1s22s22p63s23p63d104s24p64d45s1[Kr]4d45s112Mg 镁1s22s22p63s2[Ne]3s242Mo 钼1s22s22p63s23p63d104s24p64d55s1[Kr]4d55s113Al 铝1s22s22p63s23p1[Ne]3s23p143Tc锝1s22s22p63s23p63d104s24p64d55s2[Kr]4d55s214Si 硅1s22s22p63s23p2[Ne]3s23p244Ru 钌1s22s22p63s23p63d104s24p64d75s1[Kr]4d75s115P 磷1s22s22p63s23p3[Ne]3s23p345Rh 铑1s22s22p63s23p63d104s24p64d85s1[Kr]4d85s116S 硫1s22s22p63s23p4[Ne]3s23p446Pd 钯1s22s22p63s23p63d104s24p64d10[Kr]4d1017Cl 氯1s22s22p63s23p5[Ne]3s23p547Ag 银1s22s22p63s23p63d104s24p64d105s1[Kr]4d105s1 18Ar 氩1s22s22p63s23p6[Ne]3s23p648Cd 镉1s22s22p63s23p63d104s24p64d105s2[Kr]4d105s2 19K 钾1s22s22p63s23p64s1[Ar]4s149In 铟1s22s22p63s23p63d104s24p64d105s25p1[Kr]4d105s25p1 20Ca 钙1s22s22p63s23p64s2[Ar]4s250Sn 锡1s22s22p63s23p63d104s24p64d105s25p2[Kr]4d105s25p2 21Sc 钪1s22s22p63s23p63d14s2[Ar]3d14s251Sb锑1s22s22p63s23p63d104s24p64d105s25p3[Kr]4d105s25p3 22Ti 钛1s22s22p63s23p63d24s2[Ar]3d24s252Te 碲1s22s22p63s23p63d104s24p64d105s25p4[Kr]4d105s25p4 23V 钒1s22s22p63s23p63d34s2[Ar]3d34s253I 碘1s22s22p63s23p63d104s24p64d105s25p5[Kr]4d105s25p5 24Cr 铬1s22s22p63s23p63d54s1[Ar]3d54s154Xe 氙1s22s22p63s23p63d104s24p64d105s25p6[Kr]4d105s25p6 25Mn 锰1s22s22p63s23p63d54s2[Ar]3d54s255Cs 铯1s22s22p63s23p63d104s24p64d105s25p66s1[Xe]6s126Fe 铁1s22s22p63s23p63d64s2[Ar]3d64s256Ba 钡1s22s22p63s23p63d104s24p64d105s25p66s2[Xe]6s227Co 钴1s22s22p63s23p63d74s2[Ar]3d74s257La 镧1s22s22p63s23p63d104s24p64d105s25p65d16s2[Xe]5d16s228Ni 镍1s22s22p63s23p63d84s2[Ar]3d84s258Ce 铈1s22s22p63s23p63d104s24p64d104f15s25p65d16s2[Xe]4f15d16s2 29Cu 铜1s22s22p63s23p63d104s1[Ar]3d104s159Pr 镨1s22s22p63s23p63d104s24p64d104f35s25p66s2[Xe]4f36s230Zn 锌1s22s22p63s23p63d104s2[Ar]3d104s260Nd 钕1s22s22p63s23p63d104s24p64d104f45s25p66s2[Xe]4f46s21 - 1 12 号元素电子排布式原子 序数 元素 符号 元素 名称 电子排布式 电子排布式 （原子实表示）原子 序数 元素 符号 元素 名称 电 子 排 布 式 电子排布式 （原子实表示）61 Pm 钷 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 55s 25p 66s 2 [Xe]4f 56s 2 91 Pa 镤 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 26s 26p 66d 17s 2 [Rn]5f 26d 17s 2 62 Sm 钐 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 65s 25p 66s 2 [Xe]4f 66s 2 92 U 铀 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 36s 26p 66d 17s 2 [Rn]5f 36d 17s 2 63 Eu 铕 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 75s 25p 66s 2 [Xe]f 76s 2 93 Np 镎 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 46s 26p 66d 17s 2 [Rn]5f 46d 17s 2 64 Gd 钆 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 75s 25p 65d 16s 2 [Xe]4f 75d 16s 2 94 Pu 钚 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 66s 26p 67s 2 [Rn]5f 67s 2 65 Tb 铽 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 95s 25p 66s 2 [Xe]4f 96s 2 95 Am 镅 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 76s 26p 67s 2 [Rn]5f 77s 2 66 Dy 镝 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 105s 25p 66s 2 [Xe]4f 106s 2 96 Cm 锔 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 76s 26p 66d 17s 2 [Rn]5f 76d 17s 2 67 Ho 钬 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 115s 25p 66s 2 [Xe]4f 116s 2 97 Bk 锫 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 96s 26p 67s 2 [Rn]5f 97s 2 68 Er 铒 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 125s 25p 66s 2 [Xe]4f 126s 2 98 Cf 锎 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 106s 26p 67s 2 [Rn]5f 107s 2 69 Tm 铥 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 135s 25p 66s 2 [Xe]4f 136s 2 99 Es 锿 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 116s 26p 67s 2 [Rn]5f 117s 2 70 Yb 镱 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 66s 2 [Xe]4f 146s 2 100 Fm 镄 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 126s 26p 67s 2 [Rn]5f 127s 2 71 Lu 镥 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 16s 2 [Xe]4f 145d 16s 2 101 Md 钔 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 10(5f 13)6s 26p 6(7s 2) [Rn](5f 137s 2) 72 Hf 铪 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 26s 2 [Xe]4f 145d 26s 2 102 No 锘 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 10(5f 14)6s 26p 6(7s 2) [Rn](5f 147s 2) 73 Ta 钽 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 36s 2 [Xe]4f 145d 36s 2 103 Lr 铹 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 10(5f 14)6s 26p 6(6d 17s 2) [Rn](5f 146d 17s 2) 74 W 钨 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 46s 2 [Xe]4f 145d 46s 2 104 Rf 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 27s 2) [Rn]5f 14(6d 27s 2) 75 Re 铼 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 56s 2 [Xe]4f 145d 56s 2 105 Db 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 37s 2) [Rn]5f 14(6d 37s 2) 76 Os 锇 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 66s 2 [Xe]4f 145d 66s 2 106 Sg 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 47s 2) [Rn]5f 14(6d 47s 2) 77 Ir 铱 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 76s 2 [Xe]4f 145d 76s 2 107 Bh 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 57s 2) [Rn]5f 14(6d 57s 2) 78 Pt 铂 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 96s 1 [Xe]4f 145d 96s 1 108 Hs 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 67s 2) [Rn]5f 14(6d 67s 2) 79 Au 金 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 1 [Xe]4f 145d 106s 1 109 Mt 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 77s 2) [Rn]5f 14(6d 77s 2) 80 Hg 汞 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 2 [Xe]4f 145d 106s 2110 Ds 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 87s 2) [Rn]5f 14(6d 87s 2) 81 Tl 铊 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 1 [Xe]4f 145d 106s 26p 1111 Rg 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 6(6d 107s 1) [Rn]5f 14(6d 107s 1) 82 Pb 铅 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 2 [Xe]4f 145d 106s 26p 2 112Cn1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 105f 146s 26p 66d 107s 2[Rn]5f 146d 107s 283 Bi 铋 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 3 [Xe]4f 145d 106s 26p 3 84 Po 钋 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 4 [Xe]4f 145d 106s 26p 4 85 At 砹 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 5 [Xe]4f 145d 106s 26p 5 86 Rn 氡 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 6 [Xe]4f 145d 106s 26p 6 87 Fr 钫 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 67s 1 [Rn]7s 1 88 Ra 镭 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 67s 2 [Rn]7s 2 89 Ac 锕 1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 66d 17s 2 [Rn]6d 17s 2 90Th钍1s 22s 22p 63s 23p 63d 104s 24p 64d 104f 145s 25p 65d 106s 26p 66d 27s 2[Rn]6d 27s 2哥仑 钅麦 钅黑 波 卢 喜 杜 钅 钅钅钅钅钅钅达 注：1.括号内指可能的电子层排布2.红色指放射性元素。
