必修第二册 UNIT 4 INFORMATION TECHNOLOGY 限时规范练（Word练习）-【优化指导】2026年高考英语一轮复习高中总复习·第1轮（北师大版）

UNIT 4　限时规范练(A) (限时30分钟) Ⅰ.阅读理解 A Have you ever fancied a tennis lesson from one of the world's greatest tennis players at your local court? This dream came true for two young players，who got to train with 20­year­old superstar Emma Raducanu after she appeared as a hologram(全息图)—a photographic recording of the image.While Sam Clague，14，and Diamond Paisley，12，were both in London，the British number one was in Abu Dhabi. During the world's first holographic lesson，Ms Raducanu's avatar(头像) appeared to feed balls to the players and gave live feedback on their shots，like “that was fast and there was lots of topspin on that”．Even Sam said he thought she had been prerecorded at first until she spoke with him directly. Their holographic training session offers a glimpse into how advancing technology could revolutionize tennis coaching，according to Dr. Ian Pearson. Dr. Pearson thinks that mixed reality headsets will soon allow tennis players to feel they are playing in unusual virtual environments，like on a space station or the middle of a lake. Through 5G，the future of tennis will see increased interaction between real life tennis courts and the rich imagination we see in computer games—playing whenever，wherever and whoever you want. Full sensory virtual reality could even place the viewer inside the tennis player's shoes in real time.Dr. Pearson said, “By 2030，with active skin technology，the playing styles and even the sensations of top­level players could be captured，so that anyone could experience how it actually felt to play that game through full sensory virtual reality.” Finally，sportswear made from smart materials could allow for a digital coach powered by artificial intelligence (AI) to provide feedback on a player's form.Dr. Pearson said，“AI­controlled suits made from smart materials，such as fabrics with sensors，can help players find the perfect stroke when hitting or returning a serve by quickly learning the muscle memory of a flawless forehand.Using direct feedback from friendly virtual AI coaches，new players can develop and learn much more quickly.” 1．What did Ms Raducanu do in the first holographic lesson? A．Give players real time guidance. B．Require players to follow her shots. C．Record coaching contents in advance. D．Share her experiences through the hologram. 2．What can full sensory virtual reality make viewers do? A．Increase their imagination of sports. B．Take the place of top­level players. C．Experience the feeling of players on the spot. D．Have a sense of playing in an unusual place. 3．What's Dr. Pearson's attitude towards virtual AI coaches? A．Critical. B．Skeptical. C．Cautious. D．Favorable. 4．What is the text mainly about? A．The future of coaching. B．The threat from AI to coaches. C．The first live coaching online. D．The appearance of digital coaches. 【语篇解读】本文是一篇说明文。文章讲述了先进的技术如何给网球教练带来革命性的变化，使新球员可以更快地学习和发展。 1．A　[解析]细节理解题。根据第三段中的“During the world's first holographic lesson，Ms Raducanu's avatar ...at first until she spoke with him directly.”可知，Raducanu女士在第一节全息课上给球员实时的指导。故选A。 2．C　[解析]细节理解题。根据倒数第二段中的“By 2030，with active skin technology ... anyone could experience how it actually felt to play that game through full sensory virtual reality.”可知，观众可通过全感官虚拟现实体验到现场球员的感受。故选C。 3．D　[解析]推理判断题。根据最后一段中的“Dr. Pearson said，‘...Using direct feedback from friendly virtual AI coaches，new players can develop and learn much more quickly.’”可知，皮尔森博士认为虚拟人工智能教练能使新球员更快地学习和发展，所以他的态度是赞成的。故选D。 4．A　[解析]主旨大意题。通读全文可知，本文主要讲述了科技的发展为网球教练带来完全不一样的改变，即教练的未来。故选A。 B Technology is developing by leaps and bounds.A device as small as a smartphone now has more processing power than rockets to the Moon once had.New tech brings many advantages，making our lives easier and opening up new opportunities.One piece of kit that's been really taking off recently is the drone.This pilotless mini aircraft，originally developed for aerial(航空的) photography and warfare，is now bringing us benefits closer to home.In the last few years，tech companies have promised us delivery drones—bringing goods to our doorsteps in a matter of minutes.While progress in developing them has been slow，drones are becoming more and more involved in our life. Drones are helping to connect with and enhance the lives of people in remote locations.In the UK，the Royal Mail wants a fleet of 500 drones to help deliver the mail to far­flung communities.Windracers，the company developing the drones，say they can fly in fog and produce 30% fewer emissions than comparable piloted aircraft.And in Coventry in the UK，construction has started on an air hub，which will act as a base for police and delivery drones.Urban­Air Port Limited is working with car­maker Hyundai on the mini­airport，known as a skyport. Drones could also play a part in improving the health of millions of people.In Zanzibar，for example，they're being used to spray wetlands against malaria.And writing for BBC Future website，Harriet Constable describes an incredible development project by the University of South Australia.The plan is for drones to eventually be able to survey populations for disease by reading the blood oxygen levels of humans from the air.They'll also be able to scan for other vital signs，like coughing and a high temperature. It seems that the sky is the limit for what drone technology can achieve.The only thing that sometimes keeps it grounded is regulation.Writing for the BBC，Jessica Brown says，“If our skies are to become as crowded as our streets，airspace rules need updating to prevent accidents.” There are also related problems，such as noise pollution. 5．What was the primary use of the drone? A．Exploring the Moon. B．Survey and military. C．Special delivery or express. D．Transporting goods. 6．Which can replace the underlined word “hub” in Paragraph 2? A．Centre. B．Branch. C．Garage. D．Field. 7．What does Paragraph 3 imply? A．Drones could take over doctors' duties in the future. B．Drones can play a role in improving people's health. C.Drones can cure patients suffering from various diseases like malaria. D．Human beings will eventually overcome all kinds of stubborn diseases. 8．What does the author mean to do by quoting Jessica Brown? A.Emphasize there is no limit for drones development. B．Ignore the disadvantages the development of drones will bring. C.Urge the rules of drones management need to be updated. D.Prove the development of drones is beneficial without harming. 【语篇解读】本文是一篇说明文。文章主要介绍了无人机技术给我们的生活带来的好处以及它的未来发展需要注意的问题。 5．B　[解析]细节理解题。根据第一段中的“This pilotless mini aircraft，originally developed for aerial photography and warfare，is now bringing us benefits closer to home.(这种无人驾驶的微型飞机，最初是为航拍和战争而开发的，现在它给我们带来了更直接的好处。)”可知，无人机最初是用在测绘和军事领域。故选B。 6．A　[解析]词义猜测题。画线词句后半部分“which will act as a base for police and delivery drones(它将作为警用和送货无人机的基地)”说明这是个基地、交通枢纽，从而推知画线词应为“枢纽，中心”的意思。故选A。 7．B　[解析]主旨大意题。根据第三段中的“Drones could also play a part in improving the health of millions of people.(无人机还可以在改善数百万人的健康方面发挥作用。)”可知，本段讲述了无人机可以在改善人们的健康方面发挥作用。故选B。 8．C　[解析]推理判断题。根据最后一段中的“It seems that the sky is the limit for what drone technology can achieve.The only thing that sometimes keeps it grounded is regulation.Writing for the BBC，Jessica Brown says，‘If our skies are to become as crowded as our streets，airspace rules need updating to prevent accidents.’(似乎无人机技术无所不能。有时唯一能让它停飞的就是监管。Jessica Brown在为BBC撰写的文章中写道：‘如果我们的天空变得和街道一样拥挤，就需要修订空域规则，以防止事故发生。’)”可知，作者引用Jessica Brown的话是为了督促修订无人机管理规则。故选C。 Ⅱ.完形填空 As a businesswoman，I care deeply about my customers.But like anyone for whom you feel affection，__1__ can also drive you mad.They'll come rushing in，__2__ their handbag's been stolen.They'll __3__ that they left it in the changing room，create chaos(混乱) and then __4__ it had been in their car all the time.I do know how upset the shop staff can get，but I try to persuade them to keep __5__． I remember the first really __6__ customer we had at Covent Garden.She was __7__ absolutely everything，nothing was right and I was rather surprised that she became a “regular”．After a while，she __8__ for the way she behaved at the beginning.She had split up with her husband the week before，was living in a flat by herself，and since she'd found it too much to cope with(应对)，she'd taken it out on other people. That taught me a valuable __9__ and I pass it on to the people who __10__ in the market.Don't take it __11__．If a customer is rude or difficult，just think “Maybe she's had a row with her husband.Maybe her child's not __12__．” Always water it down and don't let your ego(自我) get __13__.If you do，you won't be able to __14__ it and the whole thing develops into an unpleasant scene and that __15__ everyone's day. 1．A.shopkeepers B．customers C．salespersons D．receptionists 2．A.saying B．pretending C．guessing D．replying 3．A.agree B．promise C．imagine D．swear 4．A.forget B．decide C．discover D．assume 5．A.fighting B．smiling C．waiting D．changing 6．A.generous B．polite C．careless D．difficult 7．A.curious about B．displeased with C．patient with D．uncertain about 8．A.searched B．argued C．prayed D．apologized 9．A.lesson B．trick C．skill D．trade 10．A.work B．shop C．meet D．quarrel 11．A.kindly B．secretly C．personally D．casually 12．A.ready B．away C．up D．well 13．A.out of sight B．in the way C．behind the scene D．above the law 14．A.stress B．expect C．handle D．blame 15．A.ruins B．makes C．starts D．saves 【语篇解读】本文是一篇记叙文。作者以自身经历向人们讲述了宽以待人并保持乐观心态的重要性。 1．B　[解析]根据上文I care deeply about my customers和But like anyone for whom you feel affection可推知，就像任何你喜欢的人一样，顾客们也会让你发疯。故customers符合语境，为原词复现。故选B。 2．A　[解析]根据空前的They'll come rushing in和空后的their handbag's been stolen及left it in the changing room并结合常识可知，顾客们会冲进店里，声称自己的手提包被偷了。saying符合语境。故选A。 3．D　[解析]根据空后的left it in the changing room和create chaos并结合选项可知，顾客们很肯定地说他们把手提包落在了更衣室。故选D。 4．C　[解析]根据空后的it had been in their car all the time和常识可知，顾客们很肯定地说他们把自己的手提包落在了更衣室，结果发现他们的包一直在自己的车上。故选C。 5．B　[解析]根据上文I do know how upset the shop staff can get以及该句中的but可推知，作者会试着说服店员保持微笑。故选B。 6．D　[解析]根据下文nothing was right可知，这位顾客很难打交道，故此处描述的应该是作者记得自己遇到的第一位真正难缠的顾客。故选D。 7．B　[解析]根据句意以及该句中的nothing was right可推知，这位顾客对一切都很不满意，觉得什么都不对。故选B。 8．D　[解析]根据上文“she became a ‘regular’”和空后的the way she behaved at the beginning并结合常识可知，过了一段时间，她为自己一开始的行为道歉。apologize意为“道歉”，符合语境。故选D。 9．A　[解析]根据该句中的taught me a valuable以及下文“and I pass it on to the people who __10__ in the market”可推知，这位顾客的行为给作者上了宝贵的一课，作者把它传授给了在商场工作的人。故选A。 10．A　[解析]根据句意和该句中的in the market，并结合上文的shop staff以及作者讲述自己作为商人的经历可知，作者要把自己学到的这一经验传授给在商场工作的人。故选A。 11．C　[解析]根据下文“If a customer is rude or difficult，just think‘Maybe she's had a row with her husband.’”可知，如果一个顾客很粗鲁或者很难相处，你就想“也许她和她丈夫吵架了”。由此可推知，不要因为别人的言行针对自己而不快。take sth. personally意为“以为……是冲着自己来的”。故选C。 12．D　[解析]根据上文提到的不要往心里去以及后面提到的原因可知，此处应为另一个让你不要往心里去的原因，即可能她的孩子不舒服。故选D。 13．B　[解析]根据句意以及上文Always water it down可推知，一定要淡化它，不要让你的自我妨碍你。故选B。 14．C　[解析]根据下文and the whole thing develops into an unpleasant scene可知，如果你让自我占据上风，你就无法处理好它，整件事就会演变成让人不愉快的事件，毁了每个人一天的心情。故选C。 15．A　[解析]根据空前的the whole thing develops into an unpleasant scene可推知，整件事会变得令人不愉快，最后毁了大家一天的心情。故选A。 UNIT 4　限时规范练(B) (限时30分钟) Ⅰ.阅读理解 A We are often so attracted by the promises of modern digital life that we fail to notice its_danger．It's that feeling of losing control that we get a dozen times a day，from when we get distracted(分心) with our phones in a discussion to when we can't appreciate a private moment without sharing it with virtual audience. In my first attempt to get control over my technology use，I set my phone to vibrate rather than ring.Soon after，another problem appeared.The act of continually checking the phone became a habit.I knew then that using only tips to permanently reform digital life is difficult.We should go past the notification settings(通知模式) on our devices or apps and consider the more essential topic of why we use so many apps in the first place.What all of us who are struggling with these challenges need is a technology usage philosophy，something that explains from the ground up which digital tools we allow into our lives，why，and under what conditions. Cal Newport，a professor of computer science，defines Digital Minimalism(极简主义) as a “philosophy of technology use in which you focus your online time on a small number of carefully selected activities that strongly support the things you value，and then happily miss out on everything else”． To do so，however，we cannot passively allow the tools and apps provided by the Internet age to control how we spend our time or how we feel.Instead，we must take steps to draw the positive aspects of these technologies and avoid the negative aspects. 1．What does “its_danger” in the first paragraph refer to? A．Feeling depressed. B．Getting distracted in a discussion. C．Giving up private moments. D．Losing control of the digital life. 2．Why does the author mention his own experiences? A．To make a comparison. B．To explain a phenomenon. C．To bring in a better solution. D．To clarify misunderstandings. 3．Which of the following will digital minimalists agree to? A．Ignoring the side effect of digital tools. B.Devoting the screen time to valuable things. C．Spending more time selecting information. D．Getting away from entertainment apps. 4．What's the text mainly about? A．Reforms in life. B．Technology challenges. C．Apps and social media sites. D．Technology usage philosophy. 【语篇解读】本文是一篇说明文。在数字信息时代，人们容易受科技产品影响而感到不受控制。如果人类不想被技术所绑架，就要学会利用这些技术的积极方面，避开消极方面。 1．D　[解析]词句猜测题。根据画线词所在句中的We are often so attracted by the promises of modern digital life和下文中的“It's that feeling of losing control that we get a dozen times a day ... without sharing it with virtual audience.”可知，这里的危害是指受各种数码产品的影响而感到不受控制。故选D。 2．C　[解析]推理判断题。根据第二段中的“We should go past the notification settings on our devices or apps ... under what conditions.”可知，作者提及自己的经历是为了提出一个更好的解决方案。故选C。 3．B　[解析]推理判断题。根据第三段中的“... focus your online time on a small number of carefully selected activities that strongly support the things you value ...”可推断，数字极简主义者认为应该把看电子产品的时间花在有价值的事情上。故选B。 4．D　[解析]主旨大意题。通读全文可知，本篇文章主要介绍的是关于科技使用的人生哲学。故选D。 B (2025·云南模拟)In history，the nightshade plant was used to poison kings and emperors.So it's only fitting that a new tool used to poison AI art generators is named Nightshade.Created by Ben Zhao，a computer science professor at the University of Chicago，the tool is designed to help artists fight copyright infringement(侵权) by AI art generators that are trained using their artwork. Nightshade allows artists to inject an invisible pixel(像素) into their artwork before they upload it online.If that artwork is then placed into an AI training set，it will infect the AI model and cause it to break.The original tool could be the saving grace of artists who are rightly concerned about AI infringing on their copyright. So what happens when an image is injected with Nightshade? Based on tests by the developers，the poison data affects the AI models.It can trick the system into thinking an image of a cat is an image of a balloon or that cakes are a toaster.This results in unusable output；and，once the uploaded image is infected，it's very difficult to remove.This means that tech companies will need to invest quite heavily in finding the infected samples in order to remove them. Currently，AI image generators do not pay artists for their work，and most do not offer an opt­out(退出) option.Recently，OpenAI began allowing artists to opt out of training sets for DALL­E，but some artists have found the process quite difficult.Still，while some large companies have said that they'll obey opt­out requests，it's unclear if everyone will jump on board.This is what makes Zhao's efforts so appealing. In addition to Nightshade，Zhao's team has also developed Glaze，which is designed to prevent AI from stealing an artist's style.It also works by injecting an invisible pixel into artwork.Eventually，the team wants to fold Nightshade into Glaze and allow artists to decide which tool they wish to use.Together，Zhao hopes that these tools will help favor the artist in the race to keep up with AI. 5．Why is the nightshade plant mentioned in Paragraph 1? A．To present the history of nightshade. B．To introduce the background information. C.To demonstrate different functions of nightshade. D．To explain why the name was given to the tool. 6．How does Nightshade work? A．By injecting pixels into artworks to fool AI generators. B．By forcing AI generators to pay artists. C.By banning AI generators' access to artworks. D．By damaging the artworks uploaded. 7．What will Zhao's team do next? A.Encourage more artists to use their inventions. B．Integrate Nightshade into Glaze. C.Push for the proper use of AI image generators. D.Persuade AI generators to follow the opt­ out rules. 8．What's the main idea of the text? A．A tool defends copyright by misleading AI generators. B.New challenges arise from AI image generators. C．AI image generators are violating artists' copyright. D．Nightshade helps artists to create better works. 【语篇解读】本文是一篇说明文。文章主要介绍了一款名为Nightshade的软件，它能帮助设计师解决AI绘图的侵权问题。 5．D　[解析]推理判断题。根据第一段内容可知，本段提到茄属植物是为了解释为什么命名这一软件为Nightshade。故选D。 6．A　[解析]细节理解题。根据第二段中的“Nightshade allows artists to inject an invisible pixel into their artwork before they upload it online.If that artwork is then placed into an AI training set，it will infect the AI model and cause it to break.”以及第三段中的“Based on tests by the developers，the poison data affects the AI models.It can trick the system into thinking an image of a cat is an image of a balloon or that cakes are a toaster.”可知，Nightshade将看不见的像素“注入”艺术作品中，受到像素“感染”的数据将会影响AI模型，它能够欺骗AI系统，使它把猫的图像误认为是气球，或把蛋糕的图像误认为是烤面包机。故选A。 7．B　[解析]细节理解题。根据最后一段中的“Eventually，the team wants to fold Nightshade into Glaze and allow artists to decide which tool they wish to use.”可知，研究团队最终希望将Nightshade和Glaze的功能融合在一起。故选B。 8．A　[解析]主旨大意题。通读全文可知，本文主要介绍了Nightshade这个软件如何通过在艺术作品中添加像素、“毒害”图像数据来误导AI绘图软件，从而解决AI绘图侵权的问题。故选A。 Ⅱ.七选五阅读 A plant swap is the perfect way to thin out some additional plants you have，while acquiring some brand­new ones to enjoy at the same time.Not only will you swap plants，but you'll trade information about plant care.1.______ Here are some suggestions on how to organize a plant swap. The first step is trying to calculate interest from your friends or neighbours in your community.Talk to those who garden and like plants to see if they would be interested in participating.2.______ The more people you have，the more fun it will be. 3．______ Each visitor is asked to bring a pest­free，healthy plant，or two or three for trade.They can be potted or bare root.All swapped items must be labeled(标记) with the crop type and the variety name.The visitor may additionally bring care directions for the plant. Prepare a place to host.A backyard is the ideal，casual area.Set up tables for every one of the plants and add some easy decoration to them.4.______ Once you have the location ready，you can talk to the visitors about selecting the best date and time for the event. Enjoy the swap.When all visitors arrive，let them arrange their plants on the tables and socialize.Participants will certainly have new plants to appreciate and get rid of old ones they really do not have an area for.5.______ It's a precious chance for them to share their understanding about the various plants as well as exchange their experience relevant to gardening! A．Promote the event. B．Set the rules of a plant swap. C．They will benefit a lot from the process. D．More importantly，it helps you connect with others. E．Adding a plant to your home can do much for the environment. F．You can also post on social media to measure the crowd's interest. G．That way，your guests can place the plants or containers that they bring. 【语篇解读】本文是一篇说明文。文章介绍了举办植物交换活动的几条建议和具体流程。 1．D　[解析]根据上文“Not only will you swap plants，but you'll trade information about plant care.”和下文“Here are some suggestions on how to organize a plant swap.”可知，上文提到了植物交换的好处，下文指出有一些关于如何组织一场植物交换的建议。由此可知，空处承接上文，继续陈述植物交换的好处。D项“More importantly，it helps you connect with others.”符合语境，与上文构成递进关系。故选D。 2．F　[解析]根据上文“Talk to those who garden and like plants to see if they would be interested in participating.”和下文“The more people you have，the more fun it will be.”可知，上文提出可以通过交谈看看人们是否有兴趣参与，下文说人越多越好。由此可知，F项“You can also post on social media to measure the crowd's interest.”符合语境。故选F。 3．B　[解析]空处为本段主旨句。根据下文可知，本段介绍了要给活动参与者制定规则。B项“Set the rules of a plant swap.”符合本段主旨。故选B。 4．G　[解析]根据上文“A backyard is the ideal，casual area.Set up tables for every one of the plants and add some easy decoration to them.”推知，下文陈述准备好植物交换场所的目的。G项“That way，your guests can place the plants or containers that they bring.”符合语境，That way指代上文提到的方式。故选G。 5．C　[解析]根据上文“Participants will certainly have new plants to appreciate and get rid of old ones they really do not have an area for.”和下文“It's a precious chance for them to share their understanding about the various plants as well as exchange their experience relevant to gardening！”可知，上下文都陈述了植物交换活动对参与者的益处。由此可知，空处内容承上启下，指出参与者从活动中获得的益处。C项“They will benefit a lot from the process.”符合语境。故选C。 Ⅲ.语法填空 (2025·安徽示范高中高三联考)The launch of the ShenzhouⅩⅤⅡ manned spaceship was successful.The launch came just a few days after China celebrated the 20th anniversary of its first manned mission.On Oct.15，2003，Yang Liwei，China's space hero，1.__________(realize) the country's dream of accessing outer space. In 2.__________ interview with a major media outlet，Yang，currently deputy chief designer of China's manned space program，said all Chinese taikonauts 3.__________(choose) for the manned missions to the moon must have the experience of traveling to the Tiangong space station.This is an important criterion for the selection of “moon walkers”．The Shenzhou ⅩⅤⅡ mission can therefore be described 4.__________ an important stage of the preparation for China's manned lunar mission. The Shenzhou ⅩⅤⅡ mission and its crew have many firsts.The crew is 5.__________(young) than that of any other China's manned mission.It is also the first to have a 6.__________(combine) of second­batch and third­batch taikonauts.Tang Hongbo，a veteran taikonaut 7.__________ completed his first spaceflight in 2021，8.__________(appoint) to be the first space traveler to revisit China's Tiangong space station. The ShenzhouⅩⅤⅡ crew is very young.Taikonauts Jiang Xinlin and Tang Shengjie are two of China's third­generation taikonauts，and were born in 1988 and 1989 9.__________(respective).As they are on their first space mission at such a young age，they will get plenty of opportunities 10.__________(join) more space missions. 【语篇解读】本文是一篇记叙文。文章讲述了中国神舟十七号载人飞船成功发射， 为推进中国航天事业的发展作出了巨大的贡献。 1．realized　[解析]考查动词的时态。空处作谓语，根据时间状语“On Oct.15，2003”可知，句子使用一般过去时，因此谓语动词应用过去式。故填realized。 2．an　[解析]考查冠词。interview“采访”为可数名词，此处表泛指，且interview以元音音素开头，因此用不定冠词an。故填an。 3．chosen　[解析]考查非谓语动词。空处为非谓语动词，动词choose与taikonauts构成逻辑上的动宾关系，因此用过去分词作后置定语。故填chosen。 4．as　[解析]考查介词。短语be described as表示“被描述为”，因此空处应用介词as。故填as。 5．younger　[解析]考查形容词的比较等级。根据下文than that of any other China's manned mission可知，空处应使用形容词young的比较级作表语。故填younger。 6．combination　[解析]考查名词。根据上文不定冠词a可知，空处应用单数名词combination，作have的宾语。故填combination。 7．who/that　[解析]考查定语从句的关系词。分析句子结构可知，定语从句修饰先行词taikonaut，关系词代替先行词在从句中作主语，指人，因此空处应用关系代词who或that。故填who/that。 8．was appointed　[解析]考查动词的时态、语态和主谓一致。主语Tang Hongbo与谓语动词appoint构成被动关系，根据下文last month可知，空处应用一般过去时的被动语态，且谓语用单数。故填was appointed。 9．respectively　[解析]考查副词。修饰动词短语应用副词respectively，表示“分别地”。故填respectively。 10．to join　[解析]考查非谓语动词。名词opportunity后跟不定式作后置定语。故填to join。 学科网（北京）股份有限公司 $$