选择性必修第一册 Unit 3 Faster, higher, stronger 课时精讲（教用Word）-【精微方案】2027年高考一轮总复习讲义·英语（外研版）

该高中英语讲义围绕高考核心考点，整合词汇（基础、培优、拔高分层）、语法（形容词后缀、重点词汇用法）、写作（应用文、读后续写）及阅读理解等模块，按“基础积累—能力提升—综合应用”逻辑架构知识体系。通过考点梳理（如短语搭配、句型结构）、方法指导（词汇记忆策略、写作微场景训练）、真题训练（单句语法填空、读后续写连句成文）等环节，帮助学生构建系统知识网络，突破高频难点。 资料以“语言能力培养”为核心，创新采用“词汇语境辨析+写作场景化训练”模式，如通过“跑步比赛帮扶冲刺”续写场景，融合动作描写（burst、seize）与情感表达（self-belief、steely nerve），提升学生语言表达与思维品质。设置基础巩固、能力提升分层练习，配合即时反馈，确保高效复习，为教师把控复习节奏、提升学生应考能力提供实用指导。

1．shiny adj.光滑发亮的，闪光的 2．shot n．投球，射球，击球 3．backboard n．篮板 4．bump n．隆起之处 5．teammate n．队友 6．footstep n．脚步声，足迹 7．warrior n．武士，战士 8．philosophy n．人生哲学 9．self-belief n．自信 10．hoop n．(篮球中的)篮圈 11．yoga n．瑜伽 12．net n．球网 13．surgery n．外科手术 14．comeback n．东山再起 15．semi-final n．半决赛 16．steely adj.钢铁般的；坚定的 17．nerve n．意志力 18．ingredient n．(完成某事的)要素，因素 19．tournament n．锦标赛 1.cheat v．欺骗，作弊 2．burst v．突然出现 3．opponent n．(竞争、比赛等的)对手 4．defeat v．战胜，打败 5．seize v．夺取 6．teamwork n．合作，协作 1.associate v．联系，联想→association n．协会，社团；联系，因果关系→associated adj.有关联的；相关的 2．mud n．泥，泥浆→muddy adj.沾满泥的，泥泞的 3．sharp adj.锋利的；急剧的→sharpen v．使变锋利；使提高，使改进→sharply adv.严厉地；急剧地；明显地 4．expect v．期待；预料，预期→expected adj.预料的，预期的→expectation n．预料，预期 5．remark n．言论；评述→remarkable adj.非凡的；不寻常的；引人注目的→remarkably adv.惊人地；不寻常地 6．vivid adj.生动的，逼真的→vividly adv.生动地，逼真地 7．assign v．分配，分派→assignment n．作业，任务；(工作等的)分派，布置 8．cooperate v．合作，协作→cooperation n．合作，协作→cooperative adj.合作的；同心协力的 9．intense adj.紧张的，激烈的→intensely adv.强烈地；专注地；紧张地，激烈地 1.a far cry from 与……大不相同 2．give way倒塌，向下垮，崩溃；让步，屈服 3．follow in one's footsteps效仿某人；继承某人 (尤指家人)的事业 4．carry on继续，坚持；开展 5．beyond one's expectations超出某人的预期 6．in a row连续地 7．set out动身，出发，开始 8．go wild (气得或喜得)发狂，兴奋 9．burst onto 突然出现在……(指突然成功) 10．pay off 取得成功；偿还债务；得到回报 11．ups and downs 盛衰；浮沉；苦乐；跌宕起伏 1．He probably didn't realise it at the time, but it was where he learnt to be creative and flexible as a player. (where引导表语从句) 他当时可能没有意识到这一点，但在那里他学会了作为一名球员该有的创造力和灵活性。 2．Despite his father's successful career, Stephen was thought by many people, including his high school teammates and coaches, to be too short，too thin and too weak to follow in his father's footsteps.[too＋adj./adv.(＋for sb.)＋to do sth.] 尽管斯蒂芬父亲的事业很成功，但很多人，包括他的高中队友和教练，都认为斯蒂芬太矮、太瘦、太弱，无法追随他父亲的脚步。 3．His creativity and perseverance made him Davidson's star player.(make＋宾语＋宾语补足语) 他的创造力和毅力使他成为戴维森的明星球员。 4．And there we see the Chinese players embracing, with tears of happiness in their eyes...(see＋宾语＋宾语补足语；with复合结构) 在那里，我们看到中国球员拥抱在一起，眼里含着幸福的泪水…… [基础词汇] 1．professional adj.职业的 2．strengthen v．增强 3．membership n．成员；会员 4．score n．得分 5．flexibility n．灵活性 6．a close game一场势均力敌的比赛 7．set a new record创造新纪录 8．keep fit/one's figure保持健康/保持身材 9．reduce stress and get over negative feelings减轻压力，克服负面情绪,[培优词汇] 1．motion n．运动 2．solidarity n．团结 3．foul v．犯规 4．wrestling n．摔跤 5．stretch v．伸展 6．tackle v．(足球、曲棍球等比赛中)抢断 7．try out for参加选拔 8．warm up热身 9．work out a training plan制订一份训练计划 [拔高词汇] 1．rugby n．橄榄球 2．fencing n．击剑运动 3．skateboarding n．滑板运动 4．gymnastics n．体操 5．referee n．(比赛的)裁判员；仲裁员 6．even adj.均衡的；不相上下的；同一水平的 7．race walking竞走 8．the mental strength 精神力量 9．fair play公平竞争 10．in the spirit of...本着……的精神 话题句型 1.The gist of sports is not to be interesting, but to continue and develop habits. 运动的要义不是有趣，而是坚持并养成习惯。 2．Not only do sports help people to stay fit, but the competition and teamwork in sports also give people a lot of motivation to overcome difficulties. 体育运动不仅有助于人们保持健康，而且运动中的竞争和团队合作给人们许多克服困难的动力。 形容词后缀-ible：表示“能……的、具有……性质的”。 [单句语法填空] 1．(2024·新高考全国卷Ⅱ)Emmanuel Chappard, an experienced guide, has a passion for making the great outdoors accessible(access) to all. 2．(2024·新高考全国卷Ⅱ)Campbell's point is to wake up those responsible (responsibility) for AI—the technology companies and world leaders. 3．When the heavy rain hit suddenly, it was sensible(sense) of us to cancel the outdoor picnic. expectation　n.预料，预期 [单句语法填空/补全句子/语段写作] ①(人教选必一U5)The new film generated a lot of excitement, and ticket sales were way beyond our expectations(expect). ②I really want to obtain this precious opportunity and I am sure that I can live up to/meet your expectations(不负你的期望).[应用文写作之申请信] ③我漫步回到农场，盼望着能再次见到那只可爱的小狗。不出所料，小家伙摇着欢快的尾巴，朝我跑了过来。 I wandered back to the farm, expecting to see the lovely puppy again. As expected, the little puppy came running towards me with its tail wagging happily.[读后续写之动作描写] (1)out of/beyond one's expectations 超出某人的预期 live up to/meet (one's) expectations 不负(某人的)期望 (2)expect v. 预料；期待，期望；认为 expect (sb.) to do sth. 期望(某人)做某事 be expected to do sth. 预计会做某事 (3)expected adj. 预料的，预期的 as expected 按计划进行，不出所料 [佳句背诵] As senior high school students who are facing the college entrance exmination, we all hold the firm expectations that we can be admitted to our dream universities. through years of hard work.　作为正面临高考的高中生，我们都怀揣着这样一个坚定的期许——通过数年的拼搏努力，考入自己心仪的大学。 assign　v.分配，分派；指派 [单句语法填空/微写作] ①(2025·新高考全国卷Ⅱ) Some teachers don't give the kids any assignments (assign)；they express sympathy instead. ②(译林选必四U4)Everyone would be assigned(assign) a specific task, and my role was usually to produce the presentation. ③他们主动申请分配到农村任教，因为他们迫切希望为农村教育发展出一份力。 They volunteered to be assigned to teach in rural areas,as they were eager to contribute to rural education development. (1)assign sb. sth.＝assign sth. to sb. 分配/布置给某人某事(物) assign sb. to do sth. 分派/委派某人做某事 assign sb.to sth./as sth. 指派某人做某一项工作/担任某一职务 (2)assignment n. 作业，任务；(工作等的)分派，布置 assigned adj. 指定的；已分配的 [佳句背诵] (译林选必三U4)Assigned by the emperor, the ambassador Zhang Qian journeyed from Chang'an to Central Asia, seeking to build bridges between the Han Dynasty and the Western Regions. 　在皇帝的指派下，大使张骞从长安前往中亚，试图在汉朝和西部地区之间架起桥梁。 give way　倒塌，向下垮，崩溃；让步，屈服 [单句语法填空/微写作] ①(2025·新高考全国卷Ⅱ)Hold on: Consider failure as a stepping stone to success and never give up. Stick to your plan. ②(北师大选必一U2)Whenever he had more than two thousand dollars, he would give away small bank notes to homeless people in the streets of local areas. ③永远不向任何困难屈服；继续努力，总有一天你会成功的。 Never give in to any difficulties; keep trying and you will make it one day.[读后续写之主旨升华] ④比赛结束时，他的双腿突然无力，瘫倒在了地上。 At the end of the race, his legs suddenly gave out and he collapsed on the ground.[读后续写之动作描写] give way to 被……取代；向……让步 give out 放出，发出(光、热、声音等)； 公布；用完，耗尽；失效，损坏 give away 赠送；泄露(秘密)；分发 give up 放弃；戒除 give up on 对……不抱希望 give in (to sb./sth.)　 屈服；投降 give off 放出，散发(光、热、气味等) [佳句背诵] At first Jack said nothing, and then his silence gave way to anger. 起初杰克什么也没说，后来他的沉默渐渐转为愤怒。[读后续写之情绪描写] carry on　继续，坚持；开展；经营；进行(生意、谈话等) [单句语法填空/微写作] ①To celebrate the school anniversary, all students and teachers will carry out a series of wonderful activities, such as singing and drama shows.[应用文写作之活动介绍] ②It was his courage and determination that carried him through the difficult times and helped him achieve his goals.[读后续写之主旨升华] ③I was flattered to be offered the job but wasn't sure if I could carry it off successfully, given the responsibilities and challenges that came with it. ④他双腿颤抖地站了起来，继续沿着路慢慢地走着，下定决心无论遇到什么困难都要到达目的地。 He rose to his feet on shaky legs, and carried on walking slowly down the road, determined to reach his destination no matter what difficulties he met. [读后续写之动作描写] 继续做某事 carry out 实行；执行；进行；履行(诺言、义务等) carry off 成功应对；赢得；获得(奖品、荣誉等) carry sb. through 帮助某人渡过难关 [佳句背诵] (1)(人教必修三U4)This is because people believe in the importance of carrying on space exploration despite the huge risks.　这是因为尽管存在巨大风险，人们仍坚信太空探索的重要性并执意推进。 (2)Her bravery has stimulated him the will to carry on with his life and his work.　她的勇气激发了他继续生活和工作下去的意愿。 burst onto　突然出现在……(指突然成功) [补全句子/微写作] ①We are familiar with ballets like Swan Lake. But there's another classical dance form with a long history which has only recently burst onto the world scene(在世界舞台上崭露头角)—the classical Chinese dance. ②On hearing their classmate won the national painting competition, all the children burst into thunderous applause(爆发出雷鸣般的掌声)．[读后续写之动作描写] ③He almost burst with joy(乐不可支) at the thought of being able to take care of his family through painting.[读后续写之情绪描写] ④她突然被一阵悲伤所笼罩，想起那些痛苦的回忆，眼泪不禁涌上了眼眶。 She felt seized by a burst of sadness, her eyes welling up with tears as she remembered the painful memories.[读后续写之情绪描写] (1)burst into 闯入；突然……起来 burst into＋n.＝burst out＋doing 突然……起来 burst into flames/tears/laughter/applause 突然烧起来/哭起来/笑起来/鼓掌欢呼 burst with anger/joy 勃然大怒/欣喜若狂，乐不可支 burst in 突然闯进；插嘴 (2)a burst of 一阵突然的爆发或迸发 [佳句背诵] My heart burst with joy when I heard the news that the Chinese team had won the championship. 当我听到中国队夺冠的消息时，我欣喜若狂。[读后续写之情绪描写] pay off　取得成功；偿还债务；得到回报 [单句语法填空/补全句子/微写作] ①(译林必修三U3)Forgot to carry cash？There is no need to worry—you can pay for almost everything on your smartphone. ② Paying a visit to(参观) historic sites enables us to get exposed to our history and culture in depth, which, to some extent, strengthens our national confidence and pride.[应用文写作之活动意义] ③正如谚语所说，“有志者，事竟成。”我们的努力终于得到回报，这让我们感到无比自豪和满足。 As the saying goes, “Where there is a will, there is a way.” Our efforts have finally paid off, which makes us feel extremely proud and fulfilled.[读后续写之主旨升华] pay for 付钱(买)；支付 pay up 付清全部款项 pay back 还钱；偿还；报复 pay out 付出(巨款) pay a visit to 参观；拜访 pay attention to 注意；留心 [佳句背诵] (译林选必二U1)We can see that the first news report pays more attention to the rescue efforts, while the second talks more about deaths and injuries. 我们可以看出，第一篇新闻报道更关注救援工作，而第二篇则更多地谈及了伤亡情况。 too＋adj./adv.(＋for sb.)＋to do sth. [教材原句] Despite his father's successful career, Stephen was thought by many people, including his high school teammates and coaches, to be too short, too thin and too weak to follow in his father's footsteps. 尽管斯蒂芬父亲的事业很成功，但很多人，包括他的高中队友和教练，都认为斯蒂芬太矮、太瘦、太弱，无法追随他父亲的脚步。 [单句语法填空/补全句子/微写作] ①As the old saying goes, “It's never too late to learn(learn)”—even if you're in your fifties, you can still pick up a new language or master a practical skill. ②They are too glad to share their experience with each other(非常乐意互相分享经验), creating a harmonious learning atmosphere in the class. ③Yuan Longping is such a respectable man that we can't admire him too much(我们再怎么钦佩他都不为过)．[应用文写作之人物介绍] ④当在国外工作的姐姐突然出现在他的生日派对上时，他惊讶得说不出话来。 He was too astonished to speak when his sister, who worked abroad, suddenly showed up at his birthday party.[读后续写之情绪描写] (1)“too＋adj./adv.(＋for sb.)＋to do sth.”表示否定意义，意为“(对某人来说)太……而不能做某事”； (2)“too...to...”结构中，too用来修饰表达人的态度、情绪倾向的形容词(anxious、eager、glad、happy、pleased、ready、willing等)时，动词不定式表示肯定意义； (3)“can never/can't... enough/too/too much...”意为“再怎么……也不过分”。 [佳句背诵] (1)(译林选必二U2)When a boxer is losing badly and is too tired or confused to give up on his or her own, the coach will literally throw a towel into the ring to end the fight. 当一名拳击手输得很惨，又累又糊涂，不能独自放弃时，教练会直接把毛巾扔到拳击台上，结束这场比赛。 (2)You can't emphasize enough the value of lifelong learning in modern society. 在现代社会，终身学习的价值再怎么强调都不为过。 单句语法填空/补全句子/完成句子 1．(译林选必二U4) Then in 2017, a computer program named AlphaGo defeated (defeat) Ke Jie, arguably the best human Go player, which demonstrated a significant advance in deep-learning AI systems. 2．(人教选必四U3)The aim of this initiative is to encourage cooperation(cooperate) and trade across the historic Silk Road areas, and strengthen the bonds between China and the rest of the world. 3．(北师大选必四U10) “You're not eating anything，” said Marilla sharply(sharp), eying her as if it were a serious problem. 4．The car couldn't move on the muddy(mud) road because there seemed to be something wrong with the motor. 5．After winning the championship in nationwide ping-pong matches for two years in a row, she has been invited to join a world-famous ping-pong association. 6．The scientist's remarkable(remark) discovery has opened new doors for research in renewable energy. 7．The little boy seized me by the arm(抓住我的手臂) and asked me for help, his eyes filled with desperation. 8．尽管面临诸多挑战，她决心追随父亲的脚步，成为一名著名的科学家。 Despite facing many challenges, she was determined to follow in her father's footsteps and become a renowned scientist. 提能一　语境辨词专练 1．猜测句中加黑词的词性及含义 (1)(2025·浙江卷1月)The stereotypes (刻板印象) commonly associated with men，such as competitiveness and dominance, are more valued than those associated with women. These qualities, in turn, are mapped onto products that have been assigned a gender. v.赋予 (2)After being defeated in the exam, she spent more time reviewing weak subjects. v.使受挫 (3)Immersing yourself in a foreign environment is one of the fastest ways to sharpen your language skills. v.提高；加强 (4)I was ready to pay for my bananas at the grocery, when fear seized me. My wallet was gone. v.(情绪)突然侵袭 2．选出shot的词性及含义 A．n.射击；开枪(或炮) B．n.投篮；射门 C．n.照片 D．n.尝试；努力 (1)(北师大选必四U11)Just before midnight, we all decided not to start firing before they did. We'd formed a bond and during the whole of Boxing Day, we never fired a shot and they the same; each side seemed to be waiting for the other to set the ball rolling.A (2)(北师大必修一U2)Paul jumped up and rushed onto the court. He made shot after shot, and the crowd couldn't stop clapping and cheering.B (3)(北师大必修一U2) —“Paul？” said the coach. “He can't play！” —“Give him a shot, coach！” I said. “What have we got to lose？” D (4)(2023·全国乙卷)To make some of my landscape shots, I have traveled up to four hours away to shoot within a 10-minute time frame.C 3．选出association的词性及含义 A．n.联想 B．n.联系 C．n.协会；社团；组织 (1)The International Association for Language Teaching holds an annual conference to share the latest teaching methods.C (2)The smell of jasmine brings up an association with her childhood summers spent at her grandmother's garden. A (3)Research has found a strong association between regular physical activity and reduced risk of heart disease. B 提能二　应用文写作(运动的力量) 　　假定你是李华，你校正在开展题目为“The Power of Sports”的征文比赛。请你写一篇短文参赛，内容包括：1.体育运动的益处；2.体育精神的力量。 The Power of Sports 　　Sports benefit us in many aspects. When taking part in sports, we can 1.seize the valuable chance to train(抓住宝贵的机会去锻炼) almost all parts of our bodies. There is no doubt that sports can 2.make us improve our physical fitness(让我们提高我们的身体健康；make＋宾语＋宾语补足语), and help us maintain mental health. 　　Besides, sports have a unique power to bring people together. In the playground, everyone can learn that they not only struggle for themselves but also fight for their teams. Those 3.who don't give in to defeat(不屈服于失败的人) will be rewarded someday. The spirit of sports 4.associates people of different nations and colors(将不同民族、不同肤色的人们联系在一起) for a shared future, making the world a better place. 提能三　场景微续写(跑步比赛中帮扶冲刺) ——有效强化教考衔接 词汇 积累 [情感描写]　self-belief, intense, beyond one's expectations [动作描写]　burst, seize, give way, bounce, sharpen, assign, defeat, burst onto [人物描写]　follow in one's footsteps, carry on, steely, nerve, cooperation, remarkable, teammate 佳句 积累 [人物描写]　1.Through self-belief, hard work, perseverance and some help from an old hoop, he has shown that anything is possible. 2．At last, showing a strong will and the steeliest nerves, they played a close match against Serbia to seize gold in the final. [情感描写]　1.We all stood up and started cheering and shouting.It was like being hit by a huge wave of excitement. 2．Everyone was on their feet, cheering.I was also caught up in the excitement and cheered so hard that I thought my lungs would burst! ——动作描写：“嘴”动“唇”动 经典 词汇 1.bite v．咬 2．chew v．咀嚼 3.swallow v．吞 4．open-mouthed adj.目瞪口呆的 靓点 词块 1.mouth drops/hangs wide open张大嘴巴 2．widen one's mouth咧开嘴 3．cover one's mouth捂住某人的嘴 4．one's heart in one's mouth提心吊胆 5.lick one's lips舔嘴唇 6．purse one's lips噘起嘴 7．bite one's lip咬住嘴唇；保持沉默 出彩 表达 1.She froze, her mouth hanging open.(独立主格结构)　她呆住了，嘴张开着。 2．Her mouth grew stiff with pain and distress.　疼痛和悲伤让她的嘴巴僵住了。 3．With a smile playing around his mouth, he recalled the happy past days. (with复合结构) 嘴角挂着微笑，他回忆起过去的快乐时光。 4．My mouth started watering when I smelled the food.　一闻到食物的香味，我就流口水了。 5．She bit her lower lip to keep it from trembling as tears ran/streamed/rolled down her cheeks. 当泪水顺着她的脸颊流下来时，她咬着下唇不让它颤抖。 ——积累内化应用提升 [场景呈现]　“我”在跑步比赛中不小心摔倒，前面的选手好心把“我”扶起来，“我们”一起走向终点，观众为“我们”欢呼。 第一步　完成句子 1．在离终点线200米的地方，我不幸摔倒了。所有的观众都惊得愣住了，张大了嘴巴。 At a distance of 200 meters from the finish line, I unfortunately fell on the ground. All the audience were so shocked that they froze, mouths hanging open．(独立主格结构) 2．疼痛让我的嘴巴变得僵硬。我咬着下唇不让它发抖，泪水却顺着脸颊流了下来。 My mouth grew stiff with pain. I bit my lower lip to keep it from trembling, yet tears streamed down my cheeks. 3．出乎意料的是，我前面的选手转过身来，试图把我扶起来。我难以置信地张大了嘴巴。 Unexpectedly, the runner in front of me turned around，trying to lift me up. I widened my mouth in disbelief． 4．我们嘴角挂着微笑，一起走向终点线。 With a smile playing around our mouths, we walked towards the finish line together. (with复合结构) 5．所有的观众都站了起来，爆发出欢呼声。 All the audience stood up and burst into cheers． 6．那感觉就像被一股巨大的兴奋浪潮击中了一样。 It was like being hit by a huge wave of excitement．(比喻) 第二步　连句成文 ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ One possible version： 　　At a distance of 200 meters from the finish line, I unfortunately fell on the ground. All the audience were so shocked that they froze, mouths hanging open.My mouth grew stiff with pain. I bit my lower lip to keep it from trembling, yet tears streamed down my cheeks. Unexpectedly, the runner in front of me turned around, trying to lift me up. I widened my mouth in disbelief. With a smile playing around our mouths, we walked towards the finish line together. All the audience stood up and burst into cheers. It was like being hit by a huge wave of excitement. [选自：选修教材　外研版·选修三(新教材)　UNIT 2 P21] 　　There is some doubt as to① who should perform the duty②， if it is imposed③. Some people argue that such a duty should not be codified④ for general citizens, as⑤ rescues are often inherently⑥ dangerous; we have professionally trained rescuers in the form of the police, fire brigade⑦ and ambulance service. It is assumed that rescues should be left to the professionals. Untrained people should not feel pressured or obligated⑧ to undertake rescues. There are also some who⑨ hold that⑩ there is no necessary connection between law and morality⑪， and that⑫ moral duties should not necessarily become legal duties. Indeed, the duty to rescue is perhaps the prime⑬ example of a duty that should not be codified, according to this view. ①as to关于 ②perform the duty履行职责 ③impose v．把……强加于 ④codify v．把……编入法典 ⑤as引导原因状语从句 ⑥inherently adv.固有地 ⑦fire brigade消防队 ⑧obligated adj.有义务的 ⑨who引导定语从句 ⑩that引导宾语从句 ⑪morality n．道德 ⑫that引导宾语从句 ⑬prime (常用义) adj.主要的 (文章义) adj.典型的；有代表性的 1．Which of the following is most likely to be agreed upon by those who argue against codifying the duty to rescue for general citizens? A．The police, fire brigade, and ambulance service are not professionally trained rescuers. B．Untrained people should be legally obligated to undertake rescues. C．Rescues are inherently dangerous and should be left to professionally trained rescuers. D．There is a strong connection between law and morality, and moral duties should become legal duties. 答案：C 2．What is the viewpoint of those who believe that moral duties should not necessarily become legal duties, and how do they perceive the duty to rescue? The viewpoint is that there is no necessary connection between law and morality. They perceive the duty to rescue as perhaps the prime example of a duty that should not be codified, as it is a moral obligation that should not be enforced legally. 　　【识文知意】　如果这种责任是强制的，我们对谁应该来履行这种职责有些疑问。有些人认为，这样的责任不应该被编入普通公民的法典，因为救援工作往往本身就具有危险性；我们有经过专业训练的警察、消防队和救护车服务等救援人员。人们认为救援工作应该留给专业人员去做。未经训练的人不应该感到有压力或有义务去执行救援任务。也有些人认为，法律与道德之间没有必然的联系，道德责任不一定非得成为法律责任。事实上，根据这种观点，救援义务或许是不应该被编入法典的义务的范例。 学科网（北京）股份有限公司 $