高中英语人教版 (2019)必修 第三册Unit 1 Festivals and Celebrations精品课时训练

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Reading and Thinking
目标导航


重点词汇
1. adj.至关重要的；关键性的
2． adj.必不可少的；极其重要的；充满生机的
3． n．目标；目的 adj.客观的
4． n．性质；特征；财产；房地产
5． n．提取物；摘录 vt.提取；提炼；摘录；(用力)拔出
6． n．蒿；洋艾
7． vt.& vi.(使)沸腾；煮开；烧开n.沸腾；沸点
8． n．液体adj.液体的；液态的
9． vt.(尤指经努力)获得；赢得 vi.(规章、习俗等)存在；流行
10． n．失败；挫败 vt.击败；战胜
11． n．物质；物品；事实根据
12． vi.&vt.坚持；坚决要求
词汇拓展
13．physiology n．生理学→ adj.生理学的→ adv.生理学方面
14．committed adj.尽心尽力的；坚定的→ vt.承诺；保证 vi.忠于；全心全意投入→ n．承诺；致力
15．academy n．研究院；学会；专科院校→ adj.学业的；学术的
16．botanical adj.植物学的→ n．植物学→ n．植物学家
17．evaluate vt.评价；评估→ n．评价；评估
18．distinct adj.清晰的；清楚的；有区别的→ n．区别①
19．acknowledge vt.承认；感谢→ adj.公认的→ n．承认；感谢②
20．analyse vt.分析→ n．分析
21．apparently adv.显而易见；看来；显然→ adj.显而易见的；显然的
22．scientific adj.科学(上)的；关于科学的→ n．科学→ n．科学家
重点词组
1． 成千上万
2． 导致
3． 死于
4． 承诺；保证
5． 起初
6． 一批；一堆
7． 偶然；意外地
8． 超过，多于
9． 坚决要求
重点句型
1．whose引导非限制性定语从句
This year’s Nobel Prize for Physiology or Medicine has been awarded to Tu Youyou(co­winner)，
of artemisinin，a crucial new treatment for malaria.
今年的诺贝尔生理学或医学奖授予了屠呦呦(共同获奖者)，她的研究促成了青蒿素的发现，一种治疗疟疾的关键新药物。
2．过去分词短语作定语
In 1967，the Chinese government formed a team of scientists with the objective of discovering a new treatment for malaria，and Tu Youyou was among .
1967年，中国政府组建了一支以探索治疗疟疾新方法为目的的科学队伍，屠呦呦是其中首批入选的研究人员。
3．where引导定语从句
In the beginning，Tu Youyou went to Hainan， ，to study malaria patients.
起初，屠呦呦去了疟疾比较普遍的海南，研究疟疾患者。
4．现在分词短语作定语
She analysed the medical texts again，and by chance，she found one sentence
.
她又分析了一遍医学文献，偶然发现了一句话，建议用另一种方法对待艾草。
5．Upon/On doing that...一……就……
she had been awarded the Nobel Prize，she said...
屠呦呦一听到自己获得诺贝尔奖，她就说……


知识精讲

原文呈现
TU YOUYOU AWARDED① NOBEL PRIZE
6 October 2015
This year’s Nobel Prize for Physiology or Medicine② has been awarded to Tu Youyou (co－winner)，whose research led to the discovery of artemisinin③，a crucial④ new treatment for⑤ malaria⑥【1】．Artemisinin has saved hundreds of thousands of lives⑦，and has led to improved health for millions of people.Over 200 million people around the world⑧ get malaria each year，and about 600，000 die from it.Artemisinin has become a vital⑨ part of the treatment for malaria，and is thought to save 100，000 lives a year in Africa alone【2】．
【1】whose research...artemisinin是whose引导的非限制性定语从句，修饰先行词Tu Youyou，whose在从句中作定语；a crucial new treatment for malaria是同位语，用来解释说明artemisinin。
【2】此处是“主语＋be thought＋不定式”句型。
Tu Youyou，a committed⑩ and patient scientist，was born in Ningbo，China，on 30 December 1930，and graduated from Peking University Medical School⑪ in 1955.After she graduated，she worked at the China Academy⑫ of Traditional Chinese Medicine in Beijing.In 1967，the Chinese government formed a team of scientists with the objective⑬ of discovering a new treatment for malaria，and Tu Youyou was among the first researchers chosen【3】．In the beginning，Tu Youyou went to Hainan，where malaria was more common【4】，to study malaria patients.In 1969，she became the head⑭ of the project in Beijing，and decided to review ancient Chinese medical texts to find traditional botanical⑮ treatments for the disease.Her team examined over 2，000 old medical texts，and evaluated⑯ 280，000 plants for their medical properties⑰.From their research，they discovered and tested 380 distinct⑱ ancient Chinese medical treatments that showed promise⑲ in the fight against malaria.
【3】这是由and连接的并列句。在第一个分句中，with the objective of...malaria作状语，表示目的；第二个分句中，chosen是过去分词作后置定语，修饰the first researchers。
【4】where在此引导非限制性定语从句，修饰先行词Hainan，where在从句中作地点状语。
One medical text from the fourth century suggested using the extract⑳ from sweet wormwood to treat a fever.Tu’s team tested a collection of dried wormwood leaves but found no effect.They then tried boiling fresh wormwood，and using the liquid obtained from this to treat malaria，but this did not work either.Their project got stuck.However，Tu Youyou would not acknowledge defeat.She analysed the medical texts again，and by chance，she found one sentence suggesting a different way to treat the wormwood【5】．She concluded that boiling the sweet wormwood apparently destroyed its medical properties.
【5】此处是v.－ing短语作后置定语，修饰one sentence；to treat the wormwood是不定式短语作后置定语，修饰a different way。
Using a lower temperature to draw out the extract【6】，she found a substance that worked.After failing more than 190 times，the team finally succeeded in 1971.Tu Youyou and her team members even insisted on testing the medicine on themselves to make sure that it was safe.Later，the medicine was tested on malaria patients，most of whom recovered【7】．This medicine，which was called artemisinin【8】，soon became a standard treatment for malaria.
【6】此处是v.－ing短语作方式状语。
【7】此处是由“代词＋介词＋关系代词”引导的非限制性定语从句，修饰先行词malaria patients。
【8】which在此引导非限制性定语从句，修饰先行词This medicine，which在从句中作主语。此时，which不可以用that替代。
According to Tu Youyou，the discovery of artemisinin was a team effort.Upon hearing that she had been awarded the Nobel Prize【9】，she said，“The honour is not just mine.There is a team behind me，and all the people of my country.This success proves the great value of traditional Chinese medicine.It is indeed an honour for China’s scientific research and Chinese medicine to be spread around the world【10】．”
【9】Upon/On (doing)．..意为“一……就”。
【10】“It’s an honour (for sb) to do...”意为“(某人)做……感到荣幸”，是演讲中常用的句型。
课文译文
屠呦呦获诺贝尔奖
2015年10月6日
今年的诺贝尔生理学或医学奖授予了屠呦呦(共同获奖者)，她通过研究发现了青蒿素，一种新的治疗疟疾的关键药物。青蒿素拯救了数十万人的生命，并改善了数百万人的健康状况。每年全世界超过两亿人感染疟疾，大约有60万人死于这种病。青蒿素已成为治疗疟疾至关重要的成分，被认为仅在非洲每年就能拯救10万人的生命。
屠呦呦是一位尽心尽力、有耐心的科学家，1930年12月30日出生于中国宁波，1955年毕业于北京大学医学院。毕业后，她在北京的中国中医科学院工作。1967年，中国政府组建了一支以探索治疗疟疾新方法为目的的科学家队伍，屠呦呦是首批入选的研究人员之一。起初，屠呦呦前往海南研究疟疾病人，在那儿疟疾更常见。1969年，她成为北京项目的负责人，并决定查阅古代中医文献，寻找这种疾病的传统植物学疗法。她的团队查阅了2 000多份古医药文献，评估了28万株植物的药性。他们在研究中发现并测试了380种不同的古代中医疗法，为对抗疟疾带来了希望。
一本四世纪的医药文献推荐使用青蒿提取物来治疗发烧。屠呦呦的团队试验了一批干青蒿叶，但没有发现任何效果。之后，他们尝试煮沸新鲜的青蒿，使用从中获得的液体治疗疟疾，但还是不起作用。他们的项目陷入了困境。然而，屠呦呦不甘失败。她再次分析医药文献，偶然发现一句话表明了一种处理青蒿的不同方法。她断定煮沸青蒿显然破坏了它的药性。
(通过)使用较低的温度进行提取，她发现了一种有效的物质。失败了190多次之后，这个团队终于在1971年成功了。屠呦呦和她的团队成员甚至坚持以身试药，以确保药物的安全性。后来，这种药在疟疾患者身上进行了试验，大多数患者都康复了。这种药很快成为治疗疟疾的标准药物，被称为青蒿素。
依屠呦呦所说，青蒿素的发现是团队努力的成果。当听到自己被授予诺贝尔奖时，她说：“荣誉不只属于我。我身后有一个团队，还有祖国的所有人民。这一成功证明了中药的巨大价值。中国的科学研究和中药能够在全世界传播，确实是一种荣誉。”

课文语法填空——复习本单元Reading and Thinking部分
Tu Youyou is awarded the Nobel Prize for Medicine because of her discovery of artemisinin,1. is a crucial new treatment for malaria.After 2. (graduate) from university，Tu Youyou worked at the China Academy of Traditional Chinese Medicine,3. she was committed to the objective of discovering how to treat malaria.Her team 4. (evaluate) 280,000 plants and tested 380 distinct ancient Chinese medical treatments,5. showed promise in the fight against malaria.In the beginning，not only did her team test dried wormwood leaves but they also tried 6. (boil) fresh wormwood.But neither worked.Not 7. (acknowledge) defeat，she and her team insisted on analyzing medical texts again and finally drew a 8. (conclude) that 9. (use) a lower temperature could make artemisinin extracted.As far as she is concerned，it is a great honour for Chinese medicine to 10. (spread) around the world.

知识点01 Artemisinin has become a vital part of the treatment for malaria，and is thought to save 100，000 lives a year in Africa alone.青蒿素已经成为治疗疟疾的重要组成部分，而且人们认为每年仅在非洲就可以挽救十万条生命。
vital adj.必不可少的；至关重要的；充满生机的
be vital to/for...对……是至关重要的
It is vital to do...做……很重要。
It is vital that...……是十分重要的(从句中的谓语动词用“should＋动词原形”，should可省略)。

(1)If the injuries are second or third degree burns，it get the victim to the doctor or hospital at once.如果属于二度或三度烧伤，立即把患者送去看医生或送往医院是至关重要的。
(2)Consideration for other people all of us.
对我们所有人而言体谅他人是极其重要的。
(3)It is vital (protect) wild animals in modern society.
在当今社会，保护野生动物很重要。
(4)It is vital that he (attend) the meeting organized by the academy.
他参加研究院组织的这次会议很重要。
知识点2 Tu Youyou，a committed and patient scientist，was born in Ningbo，China，on 30 December 1930，and graduated from Peking University Medical School in 1955.
屠呦呦，一位坚定而耐心的科学家，1930年12月30日生于中国宁波，1955年毕业于北京大学医学院。
committed adj.尽心尽力的；坚信的；坚定的，效忠的
※be committed to对……忠诚；致力于……
commit vt.做出(错事或非法的事)；犯(罪或错等)；承诺；保证 vi.忠于；全心全意投入
commit a crime犯罪
commit oneself to＝devote oneself to专心致志于，献身于
※commitment n．承诺；保证

(1)Most crimes are by young men in that area.
在那个地区多数罪行都是年轻人犯下的。
(2)The old woman is committed to (take) care of the poor children.
这位老人尽心尽力地照顾这个可怜的孩子。
(3)She doesn’t want to make a big emotional (commit) to Steve at the moment.
她不想在此刻对史蒂夫在感情上做出重大的承诺。
[高级表达]
(4)As she was committed to the project，she seldom played with her children.
→ ，she seldom played with her children.(用形容词短语作状语改写)
知识点3 In 1967，the Chinese government formed a team of scientists with the objective of discovering a new treatment for malaria，and Tu Youyou was among the first researchers chosen.1967年，中国政府组建了一支以探索治疗疟疾新方法为目的的科学队伍，屠呦呦是其中首批入选的研究人员。
objective n．目标；目的 adj.客观的
※objection n．不赞成；反对；异议
have an objection to...反对……
※object vi.不赞成，反对 n．目标；物体；客体；宾语
object to (doing) sth.反对(做)某事

(1)Another way of setting realistic goals is to analyze your short and long term ，keeping in mind your beliefs，values and strengths.
另一种设定现实目标的方法是分析你的短期和长期目标，牢记你的信念、价值观和优势。
(2)To his surprise，there are so many people the plan.
让他吃惊的是，有那么多人反对这个计划。
(3)The old man objects to (pay) so much money for milk.
这位老人反对花那么多钱买牛奶。
[一句多译]
(4)就我而言，我是反对在办公室里吸烟的。
①As far as I’m concerned，I smoking in the office.(objection)
②In my opinion，I smoking in the office.(object)
③In my view，I smoking in the office.(against)
知识点4 From their research，they discovered and tested 380 distinct ancient Chinese medical treatments that showed promise in the fight against malaria.在他们的研究中，他们发现并测试了380种不同的中国古代医疗方法，这些方法在抗击疟疾方面显示出了希望。
distinct adj.清晰的；清楚的；有区别的
※be distinct from...与……不同
※distinction n．差别；区分；卓著；不同凡响
make a distinction between对……加以区分
without distinction无差别地；一视同仁地

(1)The water you drink at birth leaves a signature in your teeth.
人在出生时所喝的水会在牙齿里留下很明显的印记。
(2)The new law makes no (distinct) between adults and children.
这项新法规对成人和孩子同样适用。
[一句多译]
(3)那两个想法截然不同。
①Those two ideas each other.(different)
②Those two ideas each other.(distinct)
知识点5 However，Tu Youyou would not acknowledge defeat.然而，屠呦呦没有承认失败。
acknowledge vt.承认；确认；感谢；告知收到(信件等)
acknowledge (doing) sth.承认(做了)某事
acknowledge that...承认……
acknowledge sth./sb.to be/as...承认某事/某人是……
It is (universally/generally) acknowledged that...……是大家公认的

(1)We gratefully the contributions of everyone who helped us.
我们衷心感谢每一位帮助过我们的人所付出的努力。
(2)She the best tennis player in the world.
她被公认为是世界上最好的网球手。
(3) the film Dearest was a success.
人们公认，电影《亲爱的》非常成功。
[句型转换]
(4)He never acknowledges that he has made a mistake.(改为简单句)
→He never acknowledges .
defeat vt.打败，战胜；使受挫；使困惑 n．失败
※defeat sb.击败某人
※suffer a serious defeat遭受严重的挫败

(5)It was the last question on the paper that me that day.
那天考卷上最后一道题把我难住了。
(6)The girl was let down but she would not acknowledge it.
这次失败让这个女孩很是沮丧但她没有承认失败。
(7)The player (defeat) in the game，but he didn’t lose heart.
这个运动员在比赛中被打败了，但是他没有气馁。
[易混辨析]　defeat，beat，win
※defeat和beat后都接sb.作宾语。在游戏和比赛中常用beat，侧重于比赛中击败对手；defeat既可以指比赛，又可以指战场上战胜对手。
※win后接比赛、辩论、战斗、奖品等名词，表示“荣获，赢得”。
[选词填空]　defeat，beat，win
(8)We their team by ten points.
(9)The young girl from China the race at last.
(10)In that battle，our soldiers the enemy.
知识点6 She concluded that boiling the sweet wormwood apparently destroyed its medical properties.她得出结论说，煮青蒿显然破坏了它的药用价值。
apparently adv.显而易见地；看来；显然
apparent adj.显而易见的；显然的；表面上的
be/become apparent to对……来说很明显
It is apparent (to sb.) that...(对某人来说)……是明显的。

(1)I thought he had found a new job，but he hasn’t.
我原以为他找到了新工作，但显然还没有。
(2)The solution to the problem to all.问题的解决方法是显而易见的。
(3) he knew nothing about how to repair cars.
很明显，他对修车一窍不通。
知识点7 After failing more than 190 times，the team finally succeeded in 1971.在失败了190多次以后，这个团队终于在1971年成功了。
more than超过，多于
※more than可放在数词前，意为“超过，多于”；放在名词前，表示“不只是，不仅”；放在形容词或副词前，意为“非常，很”。
※more...than...比……更……，与其说……倒不如说……

(1)Within six months， 25,000 people were using it every day.
在六个月之内，两万五千多人每天都在使用它。
(2)He to me.He is also my teacher.他不仅是我的朋友，他还是我的老师。
(3)He said that he was to help you with your English.
他说他很乐意帮你学习英语。
(4)He is lucky clever.
与其说他聪明，不如说他幸运。
知识点8 Tu Youyou and her team members even insisted on testing the medicine on themselves to make sure that it was safe.屠呦呦和她的团队成员甚至坚持在自己身上测试药物，以确保它是安全的。
insist on/upon (doing) sth.坚决要求(做)某事
在“insist that...”结构中，当insist作“坚持主张，坚决要求”讲时，其后的宾语从句用虚拟语气，即从句谓语动词用“should＋动词原形”，should可以省略；当insist作“坚持说，坚持认为”讲时，其后的宾语从句用陈述语气。

(1)I wanted to walk to the station，but he me there.
我想步行去车站，但是他坚持要开车送我去。
(2)Although she didn’t know the best way of getting to places，she she organize the trip properly.
虽然她对去某些地方的最佳路线并不清楚，她却坚持要自己把这次旅游安排得尽善尽美。
(3)The young man insisted that he (steal) that bike.
这个年轻人坚持说他没有偷那辆自行车。
知识点9 In the beginning，Tu Youyou went to Hainan，where malaria was more common，to study malaria patients.起初，屠呦呦去了疟疾比较普遍的海南，研究疟疾患者。

这是一个复合句。where在句中引导定语从句，修饰先行词 Hainan。
※当先行词为system，case，point，position，situation，stage，condition，industry，activity，job，race，scene，circumstance等且关系词在从句中作地点状语时，常用where引导定语从句，表示抽象地点。
※当先行词stage，occasion等表示时间且关系词在定语从句中作状语时，用when引导。

(1)Sometimes I bring home food from the restaurant I work.
有时我从我工作的餐馆带食物回家。
(2)It’s helpful to put children in a situation they manage everything all by themselves.
把孩子放在一个自己能完全处理所有事情的环境中是有好处的。
(3)Students should take part in some activities they can gain experience.
学生们应该参加一些他们能获得经验的活动。
(4)The stage he is preparing for his study is really important.
他为学习做准备的那段时间确实非常重要。
知识点10 In 1967，the Chinese government formed a team of scientists with the objective of discovering a new treatment for malaria，and Tu Youyou was among the first researchers chosen.1967年，中国政府组建了一支以探索治疗疟疾新方法为目的的科学队伍，屠呦呦是其中首批入选的研究人员。
※chosen为过去分词作定语，相当于定语从句which is chosen。
※单个的过去分词作定语往往置于被修饰的名词的前面；过去分词短语作定语常置于被修饰的名词的后面。及物动词的­ed形式表示被动和完成意义；不及物动词的­ed形式仅仅表示完成。
※有时为了强调还可将单一的分词置于被修饰名词之后。

(1)They are talking about the film in 2018.
他们正在谈论这部2018年上映的电影。
(2)The park has attracted a great many visitors.
这个2017年建造的公园已经吸引了很多游客。
(3)He is talking with a man (call) Mr Wang.
他正和一位叫王先生的男士讲话。
[一句多译]
(4)穿白色衣服的那个学生是我女儿。
①The student is my daughter.
②The student is my daughter.

分层提分


题组A 基础过关练
Ⅰ.单词拼写
1．It occurred to me that I could ask my cousin to help me (获得) a visa.
2．She (承认) having been cheated in the market.
3．It is difficult to (评估) the damage to this village.
4．He sits down and (分析) why she feels so upset.
5．He paused， (显然地) lost in thought staring at the book.
6．She that I go to the library with her.
7．Although his wife is young，she has made wonderful discoveries.
8．Reading is of importance in language learning.
Ⅱ.选词填空

9．He nobody but himself in the trip to Qingdao.
10．A group of thieves robbed the bank of dollars.
11．Many people cholera in Europe in the last century.
12．One may make a mistake but one can’t make mistakes all his life.
13．I think it is unwise that the company the high price.
14．She the care of the patients.
Ⅲ.单句语法填空
15．The discovery of new evidence led to the thief (catch)．
16．He was (apparent)much surprised at the news.
17．Our leader insisted that we (carry) it out.
18．Some of the people (invite) to the party couldn’t come.
19．He learned the (distinct) between gold and lead.
20．This material is very rare and is also hard (obtain)．
21．The old man is more our teacher；he’s also our friend.
22． (science) research shows that women tend to survive their husbands by 5－10 years.
Ⅳ.单句写作
23．此外，焦虑和担心会导致疾病。(lead to)
.
24．在公园散步时，她偶然遇到了汤姆。(by chance)
.
25．那些货物正被送到地震发生过的地方。(where引导定语从句)
.
26．他住在一个窗户面朝北的房间里。(whose引导定语从句)
.
27．在会议上讨论过的那个问题很重要。(过去分词作定语)
.

题组B 能力提升练
One afternoon，after finishing shopping in a supermarket，my family and I went to the check-out.I suddenly thought we didn’t need any of the junk，and we abandoned all of those，saving $300.
That got me thinking about all our pointless expenses in life.With a promise that we’d stop if it was killing us，I convinced the family to take the leap into frugality.The rules were that we would buy nothing for 30 days except absolutely essentials.
Our adventure began with a great start.By 9 a．m.，my wife，Ruth，had already made cakes from old strawberries and picked flowers I didn’t even know we had in the garden.I cleared the car by hand for the first time for years.I read and returned the neighbor’s newspaper before he woke up.Total spending on the first day：$0.
As days turned into weeks，we became so proficient(熟练的) at living frugally.We started riding our bikes to save gas.My child’s finger painting was recycled as gift wrap for the home-made presents.We started to use an Internet application like Skype for free phone calls and ask neighbors with gardens for extra vegetables and herbs.
In the end，we saved more than $2,000 by not spending for a month.When we began，I imagined we would rush out the moment we were done and buy a lot of things in the supermarket.Then maybe hit the mall or go to the movies.
1．What can we infer from the passage before that very afternoon?
A．The family had often spent money randomly.
B．The family had had higher income and living standard.
C．The family had adopted an advisable habit of saving money.
D．The family hadn’t expected they would have financial problems.
2．How many things were mentioned about what the family did to save on the first day of the “30 days”？
A．Two. B．Three.
C．Four. D．Five.
3．The end of the story suggests that the family .
A．stopped halfway because of unexpected things
B．could barely put up with the life of frugality
C．would return to normal after the “30 days”
D．succeeded in saving and changed their spending habit
4．What is this passage mainly about?
A．A new idea coming up to save gas.
B．A family’s managing their daily life.
C．A family’s attempt not to buy anything.
D．A family’s way of solving life problems.



题组C 培优拔尖练
C
Classifying things is critical for our daily lives.For example，we have to detect spam mails(垃圾邮件)，false political news.When we use AI，such tasks are based on “classification technology” in machine learning—having the computer learn，using the boundary separating positive and negative data.For example，“positive” data would be photos including a happy face，and “negative” data photos that include a sad face.Once a classification boundary is learned，the computer can determine whether a certain data is positive or negative.
However，the difficulty with this technology is that it requires both positive and negative data for the learning process，and negative data are not available in many cases.For instance，when a retailer(零售商) is trying to predict who will make a purchase，they can easily find data on customers who have purchased from them (positive data)，but it is basically impossible to obtain data on customers who have never purchased from them (negative data)，since they do not have access to their competitors’ data.
According to lead author Takashi Ishida from RIKEN AIP，“Previous classification methods could not cope with the situation where negative data were not available，but we have made it possible for computers to learn with only positive data，as long as we have a confidence score for our positive data，constructed from information such as buying intention or the active rate of app users.Using our new method，we can let computers learn a classifier only from positive data equipped with confidence.”
According to Ishida，“This discovery could expand the range of applications where classification technology can be used.Even in fields where machine learning has been actively used，our classification technology could be used in new situations where only positive data can be gathered due to data regulation or business constraints (限制)．In the near future，we hope to put our technology to use in various research fields，such as natural language processing，computer vision，robotics，and bioinformatics.”
1．How can the computer distinguish the positive data from the negative data?
A．By learning the classification boundary.
B．By updating the data collected regularly.
C．By separating happy faces and sad ones.
D．By introducing classification technology.
2．Why is the example mentioned in Paragraph 2?
A．To prove how important the positive data are.
B．To confirm that data on customers are complete.
C．To argue that retailers get their competitors’ data.
D．To explain why negative data are hard to acquire.
3．What do the underlined words “new method” in Paragraph 3 refer to?
A．Analyzing buying intention.
B．Building a confidence score.
C．Assessing the active rate of app users.
D．Equipping the computer with confidence.
4．What can be a suitable title for the text?
A．The History of Classification Technology
B．Smarter AI：Machine Learning Without Negative Data
C．Bigger Data：Computers Assisting Language Processing
D．The Comparison Between Positive Data and Negative Data