专题19 科技发展与信息技术创新（二）

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单词&短语
1._____________vt.加速；加快
2._____________v.获得，得到；购得；养成(习惯)
3._____________vv.进展；进步n.进展；进步；前进
4._____________vn.优点，好处；优势；有利条件
5._____________vt.做广告；宣传；征聘；公告
6._____________vn.轶事，趣闻；传闻
7._____________vv.签字n.符号；手势；迹象；指示牌
8._____________vn.重大进展；突破
9._____________vn.广播，电视节目；vt.广播；播送；传播
10._____________vt.计算，核算；推测；预测
11._____________n.目录；目录簿；一连串(坏事)
12._____________n.挑战；艰巨任务；(比赛等的)邀请
13._____________vt.点击；使发出咔嗒声；豁然开朗
14._____________n.克隆动物(或植物);复制品
15._____________n.数据库；资料库
16._____________n.&v.争论，辩论，讨论
17._____________vt.删去；删除
18._____________vt.打扰；扰乱；搅乱；使心神不宁
19._____________v.下载n.已下载的数据资料
20._____________adj.电子的；电子器件的；电子设备的
21._____________n.实验；试验；尝试；实践
22._____________vt.探索；勘查；考察；探索；探讨
23._____________vt.揭露；揭开；使暴露；使显露
24._____________vt.把……分开；分割；划分；隔开
25._____________vt.插入；嵌入；(在文章中)添加；加插
26._____________adj.智能的；聪慧的；有才智的
27._____________adj.移动的；走动方便的；流动的
28._____________v.预言；预示；预报
29._____________n.火箭；火箭弹；焰火；烟花
30._____________adj.科学的；关于科学的；细致严谨的
31._____________n.技术；科技；技术性机器
32._____________n.&vt.移植；移栽；移种；使迁移
33._____________vt.更新；使现代化；为……提供最新信息
34.在现场__________________________
35.n schedule__________________________
36.in search f__________________________
37.就座__________________________
38.安全感__________________________
39.see t it
40.抓着某人的胳膊__________________________
41..派人去叫医生__________________________
42.常识__________________________
43.有道理，讲得通__________________________
44. there is n sense in ding sth.__________________________
45.be sensitive t.__________________________
46.被判死刑__________________________
47.一系列的__________________________
48.认真对待某人/某事__________________________
49.充当__________________________
50.at sb.'s service__________________________
51.开始着手做……__________________________
52.让人感到羞愧的是__________________________
53.缺乏__________________________
54.in all respects/aspects/frm all sides__________________________
55.不管；尽管__________________________
56.不遗余力__________________________
57.赞扬__________________________
58.谈到；提及__________________________
59.凝视__________________________
60.ut f stck/in stck__________________________
61.advertising signs__________________________
62.advertise fr sth.__________________________
63.artificial intelligence__________________________
64.be addicted t__________________________
65.by this means__________________________
词汇拓展
1.sign n.迹象；征兆；预兆；招牌；标牌；指示牌；标志；示意的动作(或声音);手势v.签(名);署(名);签字；签署；和……签约(或应聘);示意；打手势
There's n______________f rain.没有下雨的迹象。
The_____________n the wall said"Nw wash yur hands".
墙上的牌子上写着“现在请洗手”。
She ndded as a_____________fr us t sit dwn.她点头示意我们坐下。
The htel manager_____________t the prter t pick up my case.
旅馆经理示意行李工替我拿箱子。
He saw the sng's ptential,and persuaded the cmpany t_____________her up.
他看到了这首歌的潜力，就说服公司和她签约。
【辨析】
sign,signal,symbl,mark的区别
sign指人们公认的事物的记号、标志，也可指某种情况的迹象。
signal指为某一目的而有意发出的信号、暗号。symbl指有象征意义的或表达某种深邃含义的特殊事物。
mark既可指方便于辨认而有意做的标记，又可指自然形成的标记或有别于其他事物的特征。
When they fund the ship was sinking,they immediately sent ut the emergency signal SOS.
当他们发现船正在下沉的时候，他们立刻发出了SOS紧急求救信号。
A dve is ften used as a symbl f peace.鸽子常被作为和平的象征。
He made sme marks in the article where (it was) necessary.
他在文中必要的地方做了一些记号。
2.separate adj.单独的；独立的；分开的；不同的；不相关的v.(使)分开，分离；分割；划分；(使)分离，分散；隔开；阻隔
We'd better_____________the gd nes frm the bad nes.我们最好把好的和坏的分开。
They want t_____________teaching frm research.他们想把教学和研究分开。
She desn't want t be_____________frm him.她不想和他分开。
The branch has_____________frm the trunk f the tree.这个树枝已从树干上脱落了。
【辨异】separate,divide的区别
separate通常指把原来连在一起或靠近的东西分隔开来，其后常接介词frm。
divide通常指把整体分为若干部分(有时含平均划分之意),其后常接介词int。
A year is divided int fur seasns.一年分为四季。
United we stand,divided we fall.团结则存，分裂则亡。
活学活用
一、阅读下列句子，在空白处填入1个单词或用括号内所给单词的适当形式填空。
1.The river separates this village_____________that ne.
2.It's an interesting_____________(science)phenmenn,but f n practical use whatever.
3.Befre he culd run away,she seized him by_____________cllar.
4.I have just given yu 20 very practical ways t_____________(sharp)yur mind.
5. The car crashed int a bus n the bridge,and the driver was killed_____________the spt.
二、翻译句子
1.If I had nticed the warning signs,nne f this wuld have happened.
_______________________________________________________________
2.These audiences must have missed watching their music perfrmance,therwise, they wuld speak highly f it.
_______________________________________________________________
3.他自荐当我们商场的经理。(serve as)
_______________________________________________________________
4.人家托你的事，你别不在意。(take... seriusly)
_______________________________________________________________
参考答案
1.accelerate 2.acquire 3.advance 4.advantage 5.advertise 6.anecdte 7.sign 8.breakthrugh 9.bradcast 10.calculate 11.catalgue 12.challenge 20.electrnic 23.expse 24.separate 25.insert 26.intelligent 27.mbile 28.predict 29.rcket
30.scientific 31.technlgy 32.transplant the scene/spt 35.按计划 36.寻找 37.take ne's seat/be seated 38.a sense f security 39.务必使40.seize sb. by the arm41. send fr a dctr 42.cmmn sense 43.make sense
44.做某事是没有意义的45.对……敏感 46.be sentenced t death 47.a series f48.take sb./sth. seriusly 49. serve as...
50.为某人效劳 51. set abut ding/set ut t d 52. t ne's shame 53.be shrt f 54.从各方面 55.in spite f
56.spare n effrt(s)57. speak highly f 58. speak f 59.stare at 60.缺货/有货 61.广告牌 62.登广告征求/寻找……
63.人工智能 64.沉迷于…… 65.以这种方式
词汇拓展
1.sign;sign;sign;signed;sign
2.separate;separate;separated;separated
活学活用
一、1.frm 2.scientific 3.the 4.sharpen 5.n
二、1.如果我注意到了那些警告标志，这种事就一桩也不会发生了。
2.那些观众肯定是错过了看他们的音乐演出，否则他们会给予高度评价的。
3.He vlunteered t serve as the manager f ur department stre.
4.When peple ask yu t d smething,yu shuld take it seriusly.
第二部分 话题阅读训练
（A）阅读理解
Rbtic surgery is ne thing, but sending a rbt inside the bdy t carry ut an peratin quite anther, which has lng been a gal f sme researchers t prduce tiny rbtic devices being capable f traveling thrugh the bdy t deliver drugs r t make repairs withut the need fr a single cut, the pssibility f which has just gt a bit clser.
Hwever, unlike the plt f ne film—which featured a micrscpic crew and submarine traveling thrugh a scientist’s bldstream — this device culd nt be inserted int bld vessels（管）because it is t big. While ther types f miniature swallwable rbts have been develped in the past, their rle has mstly been limited t capturing images inside the bdy. In a presentatin this week t the Internatinal Cnference, Daniela Rus and Shuhei Miyashita f the Massachusetts Institute f Technlgy described a rbt they have develped that can be swallwed and used t cllect dangerus bjects accidentally taken in.
T test their latest versin, Dr Rus and Dr Miyashita designed a rbt as a battery hunter, which might seem t be an dd task, but mre than 3,500 peple in America alne, mst f them children, swallw the tiny buttn cells used in small electrnic devices by accident every year. T start with, the researchers created an artificial esphagus（食道）and stmach made ut f silicne(硅胶). It was clsely mdeled n that fund in a pig and filled with medical liquid; the rbt itself is made frm several layers f different materials, including pig intestine（肠）, and cntains a little magnet. This is flded up and encased in a 10mm×27mm capsule f ice. Once this reaches the stmach the ice melts and the rbt unflds which is mved and guided with the use f a magnetic field utside the bdy. In their tests, the rbt was able t tuch a buttn battery and draw it with its wn magnet, and during dragging it alng, the rbt culd then be directed twards the intestines where it wuld eventually be gtten rid f thrugh the anus(肛门). After it, the researchers sent in anther rbt laded with medicatin t deliver it t the site f the battery burn t speed up healing.
The artificial stmach being transparent n ne side, the researchers were able t see the batteries and visually cntrl the rbts. If nt, that will require help with the help frm imaging system, which will be a bit mre f a challenge, but Dr Rus and Dr Miyashita are determined t succeed.
4．Accrding t the passage, the rbt peratin will prbably be able t_________.
A．travel thrugh a scientist’s bldstream
B．enter the bdy t deliver drugs r make repairs
C．phtgraph the bdy t cnvey t the dctr
D．perate n a persn utside the bdy cmpletely
5．We learn frm Paragraph 3 that _________.
A．the researchers did the experiment n a chsen animal
B．the actual size f the rbt may be larger than the capsule f ice
C．digesting the swallwed batteries is difficult fr children
D．the rbt tk necessary drugs besides a little magnet
6．What may the experiment mean t the medical wrld?
A．Fewer children will swallw the buttn cells.
B．A rbt will be invented travelling bld vessels.
C．The surgeries will cst patients much mney.
D．Patients will suffer less fr sme surgeries.
7．Which can be the mst suitable title fr the passage?
A．The Fantastic Rbtic VyageB．The Explratin f Rbt Technlgy
C．Tiny Rbt, Significant RleD．An Experiment n Rbt
【答案】4．B5．B6．D7．A
【解析】本文是一篇说明文。主要向读者介绍了一种微型机器人，可以负载药物在人体内进行治疗。并对其原理工作的实施操作进行了说明。
4．细节理解题。根据文章第一段“tiny rbtic devices being capable f traveling thrugh the bdy t deliver drugs r t make repairs withut the need fr a single cut(微型机器人装置，这种装置能够穿过身体运送药物或进行修复，而无需一次切割)”可知，机器人可能会在治疗过程中携带药物进入人体，或对其进行修复。故选B项。
5．主旨大意题。根据文章第三段“the rbt itself is made frm several layers f different materials, including pig intestine（肠）, and cntains a little magnet. This is flded up and encased in a 10mm×27mm capsule f ice.(机器人本身是由几层不同的材料制成的，包括猪肠(肠）, 还有一块小磁铁。这是折叠起来，并封装在一个10毫米×27毫米的冰胶囊)”可知，机器人是被折叠放入冰囊的，但它的实际体积可能比冰囊大。故选B项。
6．细节理解题。根据文章第一段“tiny rbtic devices being capable f traveling thrugh the bdy t deliver drugs r t make repairs withut the need fr a single cut(微型机器人装置，这种装置能够穿过身体运送药物或进行修复，而无需一次切割)”可知，机器人减少了手术带来的痛苦。故选D项。
7．主旨大意题。根据文章第一段“tiny rbtic devices being capable f traveling thrugh the bdy t deliver drugs r t make repairs withut the need fr a single cut(微型机器人装置，这种装置能够穿过身体运送药物或进行修复，而无需一次切割)”可知，本文主要介绍了一种微型机器人，可以负载药物在人体内进行治疗。故A项“奇妙的机器人之旅”为最佳标题。故选A项。
（B）完形填空
Early n Saturday mrning, parents and viewers walked in a line int the gym at the Einste Academy, a schl in Illinis in the US. After the cach 21 his pening speech everyne 22 fr the US's natinal sng. After the sng, judges dressed in black and white shirt tk up their 23 utside the playing field, ready fr the games t begin.
While this sunds like the typical setting f a US sprting event, this ne had a high-tech twist, was a cmpetitive rbtics 24 —a game that turns the subjects f science, technlgy, engineerin and mathematics int a cmpetitive sprt.
25 by caches, teams f students in grade 7 thrugh 12 wh designed, built and prgramm their wn rbts cmpeted against ther rbtics teams in the West Suburban League Nrth Divisin the FIRST Tech Challenge (FTC).
“Mst students experience multiple-chice questins.” said Jnathan Weiland, wh wrks f FIRST Tech Challenge in Illinis. “In FTC, there are hundreds f slutins t a prblem and they see which slutin 26 the best.”
“Funded by a nt-fr-prfit rganizatin, FIRST (Fr Inspiratin and Recgnitin f Science ai Technlgy) events are mdeled after traditinal sprts like basketball t generate 27 in rbtic,” Weiland said. FIRST Tech Challenge is ne f fur FIRST prgrams.
During a FIRST Tech Challenge, Rbtics teams either 28 a rbtics kit(配套组件), adjusting and upgrading their design, r custm build(专门制作) a rbt using 29 materials, recrding the prgress in engineering ntebks.
The rbtics teams cmpete in games within a league, getting pints thrughut the seasn 30 a natinal and even glbal cmpetitins. There are 35 teams in the West Surburban Leagn Nrth Divisin and nly eight will g t the state, Weiland said. Teams earn awards based n the rbt’s 31 ,design and ther accmplishments.
“Judges 32 pair tw rbtics teams t frm a grup that cmpetes against tw ther teams. With multiple games played by all teams at each meet, a cmpetitr in ne game might be a 33 in the next,” Weiland said. Students are taught t help each ther at all times and t 34 the ther team, he said.
“One f the best things yu can d with yur 35 is t share smething with smene else,” student said. “It's fun being n the jurney with them.”
21．A．deliveredB．wrteC．reviewedD．crrected
22．A．sentB．calledC．appliedD．rse
23．A．referencesB．ntebksC．psitinsD．respnsibilities
24．A．meetB．exampleC．designD．creatin
25．A．BlamedB．GuidedC．WarnedD．Praised
26．A．switchesB．respndsC．appearsD．wrks
27．A．disappintmentB．vilenceC．excitementD．pwer
28．A．purchaseB．damageC．thrwD．stre
29．A．pliticalB．industrialC．financialD．agricultural
30．A．bring upB．turn inC．stick tD．qualify fr
31．A．mdelB．materialC．perfrmanceD．lcatin
32．A．hpefullyB．randmlyC．skillfullyD．actively
33．A．cachB．judgeC．rmmateD．teammate
34．A．discurageB．beatC．greetD．jin
35．A．intelligenceB．rightC．lifeD．hbby
【答案】21．A22．D23．C24．A25．B26．D27．C28．A29．B30．D31．C32．B33．D34．B35．C
【解析】这是一篇说明文。文章主要介绍了在教练的指导下，7年级到12年级的学生团队设计、制造和编程自己的机器人，与其他机器人团队在西部郊区联盟北区的FIRST技术挑战赛中竞争的事。
21．考查动词词义辨析。句意：教练致开幕词后，所有人都为美国国歌起立。A. delivered发表；B. wrte写；C. reviewed评论；D. crrected更正。根据空后的“his pening speech”可知，此处表示“发表开幕演讲”，为固定短语deliver a speech。故选A项。
22．考查动词词义辨析。句意：教练致开幕词后，所有人都为美国国歌起立。A. sent发送；B. called打电话；C. applied申请；D. rse起立。根据空后的“fr the US's natinal sng”和常识可知，当国歌响起时，人们都要起立。故选D项。
23．考查名词词义辨析。句意：歌曲结束后，裁判员身着黑白衬衫在赛场外各就各位，准备开始比赛。A. references参照；B. ntebks笔记本；C. psitins位置；D. respnsibilities责任。根据“ready fr the games t begin”和空前的“tk up their”可知，裁判准备开始比赛，所以他们在场外就位，take up ne’s place意为“就位”。故选C项。
24．考查名词词义辨析。句意：虽然这听起来像是典型的美国体育赛事的背景，但这次的比赛有高科技的转折，是一场竞争性的机器人比赛——一场将科学、技术、工程和数学主题转变为竞争性运动的游戏。A. meet集会；B. example例子；C. design设计；D. creatin创造。根据“a game that…”可知，这是一场有机器人参与的竞争性的游戏比赛，所以可以推断此处表达是一次机器人的集会。故选A项。
25．考查动词词义辨析。句意：在教练的指导下，7年级到12年级的学生团队设计、制造和编程自己的机器人，与其他机器人团队在西部郊区联盟北区的FIRST技术挑战赛中竞争。A. Blamed责备；B. Guided指导；C. Warned警告；D. Praised表扬。根据“by caches”可知，此处应该指在教练的指导下，学生团队运用机器人进行比赛竞争。故选B项。
26．考查动词词义辨析。句意：在FTC，一个问题有数百种解决方案，他们会看哪种方案效果最好。A. switches转变；B. respnds回应；C. appears出现；D. wrks起作用。根据“hundreds f slutins”和空后的the best可知，一个问题有很多种解决方案，此处表示他们会看看哪种方案最有效。故选D项。
27．考查名词词义辨析。句意：Weiland说：“FIRST活动是由一个非盈利组织创立的，它模仿了篮球等传统体育运动，以激发人们在机器人中的兴奋感。” A. disappintment失望；B. vilence暴力；C. excitement兴奋；D. pwer力量。根据“a cmpetitive rbtics”和空前的generate可知，这是一场有关机器人的竞技比赛，所以可以推断，过程中会激发人们的紧张和兴奋感。故选C项。
28．考查动词词义辨析。句意：在FIRST Tech Challenge期间，机器人团队要么购买一个机器人工具包，调整和升级他们的设计，要么使用工业材料定制一个机器人，在工程笔记本上记录他们的进展。A. purchase购买；B. damage损害；C. thrw扔；D. stre存储。分析可知，空处和下文“r custm build(专门制作)”相对，表示购买一个机器人工具包，调整和升级他们的设计。故选A项。
29．考查形容词词义辨析。句意：在FIRST Tech Challenge期间，机器人团队要么购买一个机器人工具包，调整和升级他们的设计，要么使用工业材料定制一个机器人，在工程笔记本上记录他们的进展。A. plitical政治的；B. industrial工业的；C. financial金融的；D. agricultural农业的。根据“custm build(专门制作) a rbt”和空后的materials可知，此处指要么用工业材料专门制作一个机器人。故选B项。
30．考查动词短语辨析。句意：机器人团队在一个联赛中比赛，在整个赛季中获得积分，将有资格参加全国甚至全球的比赛。A. bring up提出；B. turn in交上；C. stick t坚持；D. qualify fr有资格。空后的“a natinal and even glbal cmpetitins”指的是更高级别的赛事，因此可推知，此处指通过整个赛季的积分获得州、国家甚至全球比赛的资格。故选D项。
31．考查名词词义辨析。句意：参赛队伍根据机器人的表现、设计和其他成就获得奖励。A. mdel模型；B. material材料；C. perfrmance表现；D. lcatin位置。根据“adjusting and upgrading their design”和空后的“design and ther accmplishments”可知，这是机器人团队通过设计和操作机器人而进行的竞技比赛，所以可以推知，参赛队伍基于机器人的表现、设计和其他一些成就来获奖。故选C项。
32．考查副词词义辨析。句意：裁判随机将两支机器人队伍组成一组，与另外两支队伍竞争。A. hpefully希望；B. randmly随机；C. skillfully巧妙地；D. actively积极地。根据“With multiple games played by all teams at each meet, a cmpetitr in ne game might be a________in the next”可知，一场比赛中的竞争者可能就是下一场比赛中的队友，所以可以推断，裁判是随机给两个机器人队配对形成一组，和其他两个队比赛。故选B项。
33．考查名词词义辨析。句意：Weiland说：“在每场比赛中，所有队伍都会参加多场小的比赛，一场比赛中的竞争者可能就是下一场比赛中的队友。” A. cach教练；B. judge裁判；C. rmmate室友；D. teammate队友。根据“Judges________pair tw rbtics teams t frm a grup”和“With multiple games played by all teams at each meet”可知，裁判是随机给两个机器人队配对形成一组，且所有队伍都会参加多场小的比赛，所以可以推断，一场比赛中的竞争者可能就是下一场比赛中的队友。故选D项。
34．考查动词词义辨析。句意：他说，学生们被教导在任何时候都要互相帮助，击败另一队。A. discurage阻止；B. beat击败；C. greet欢迎；D. jin加入。根据“the ther team”可知，此处和上文中的“help each ther”相对，表示互相帮助，击败对手。故选B项。
35．考查名词词义辨析。句意：一个学生说：“在你的生活中，你能做的最好的事情之一就是与别人分享一些东西。” A. intelligence智力；B. right权利；C. life生活；D. hbby爱好。根据“share smething with smene else”可推知，此处指生活中能做的最好事情之一是和别人分享某样东西。故选C项。
（C）七选五
Tp uses f smartphnes
Tday apprximately 3.5 billin peple wn smartphnes all ver the wrld. In this article, we explre what we use ur smartphnes fr.
16．
Mst websites tday are mbile-friendly, while there are als mbile apps that yu can use t buy everything frm clthes t husehld items and mre. Because it's far easier and mre cnvenient t make a purchase nline, a great percentage f peple rder frm nline sites. In fact, mst users prefer t be able t cmpare and learn abut different items n their phnes. Hence, if anyne is lking t build an nline brand, it is certainly imprtant t develp a mbile-friendly site fr the ultimate nline shpping experience.17．.
Scial Media Usage
Scial media sites became a g-t site fr many users that spend time n their mbile devices.18．. It is widely used in cmparisn t ther ppular scial media platfrms like Instagram. But, scial media apps are nt nly used t interact with ther users but als t cnsume infrmatin, whether it is entertaining vides, news, infrmatin abut certain prducts and services. Otherwise, peple rely n smartphnes when they want t share their cntent (phts, vides , articles) n scial media platfrms.19．.
Cnsumptin f Digital Media
Smartphnes are leading devices in the cnsumptin f digital media, and the time users spend is usually n apps.20．. S, whether yu are lking t watch yur favrite TV shws, listen t music, r yu want t read bks, listen t pdcasts, there are many apps that yu can check ut and dwnlad n yur device. Actually, a lt f cmpanies like Tencent and Yuku have designed apps t make their cntent mre accessible n the mve.
A．Friendly websites
B．Mbile Shpping
C．Actually, Wechat is ne f the largest scial media netwrks
D．Hence, a lt f businesses use them t prmte their prducts
E. As we knw, there's a wealth f apps available fr dwnlad, free f charge
F. Sme famus e-cmmerce sites include Amazn, Taba, JD and many thers
G. There are sme apps that are nt designed t entertain yu but t help yu enrich yur knwledge
【答案】16．B17．F18．C19．D20．E
【解析】
16．根据第二段第一句“Mst websites tday are mbile-friendly, while there are als mbile apps that yu can use t buy everything frm clthes t husehld items and mre.(如今大多数网站都是手机友好型，与此同时还有许多手机应用你可以用来买东西，从衣服到生活用品)”可知，这一段讨论的是智能手机的网上购物功能。而空格处是这一段的小标题。由此可知，B. Mbile Shpping(移动购物)符合题意。故选B。
17．根据前一句“Hence, if anyne is lking t build an nline brand, it is certainly imprtant t develp a mbile-friendly site fr the ultimate nline shpping experience.(因此，如果某人想要建立一个网上品牌，为最佳购物体验搭建一个手机友好的网址无疑很重要)”提出要搭建网址，随后可能进一步举例说明好的网址有哪些。由此可知，F. Sme famus e-cmmerce sites include Amazn, Taba, JD and many thers(一些著名的电子商务网站包括亚马逊、淘宝、京东等)符合题意，F选项提出Amazn, Taba, JD(亚马逊、淘宝和京东)作为例子。故选F。
18．前文“Scial media sites became a g-t site fr many users that spend time n their mbile devices.(社交媒体网站成为许多花时间在移动设备上的用户的首选网站)”提出现在手机用户花很多时间使用手机，社交网址成为了智囊网址。而后文接着提出“It is widely used in cmparisn t ther ppular scial media platfrms like Instagram.(与Instagram等其他流行的社交媒体平台相比，它被广泛使用)”。由此推知，空格处应该提到了一种社交媒体平台。由此可知，C. Actually, Wechat is ne f the largest scial media netwrks(事实上，微信是最大的社交媒体网络之一)符合题意。故选C。
19．根据上文“But, scial media apps are nt nly used t interact with ther users but als t cnsume infrmatin, whether it is entertaining vides, news, infrmatin abut certain prducts and services. Otherwise, peple rely n smartphnes when they want t share their cntent (phts, vides , articles) n scial media platfrms.(但是，社交媒体应用不仅用于与其他用户互动，还用于消费信息，无论是娱乐视频、新闻，还是关于某些产品和服务的信息。否则，当人们想要在社交媒体平台上分享他们的内容（照片、视频、文章）时，就会依赖智能手机)”可知，要通过手机消费，必须要有商家提供商品信息。由此可知，D. Hence, a lt f businesses use them t prmte their prducts(因此，很多企业使用它们来推广他们的产品)符合题意。故选D。
20．根据上文“Smartphnes are leading devices in the cnsumptin f digital media, and the time users spend is usually n apps.(智能手机是数字媒体消费的主流设备，并且用户大多数时间都花在应用上)”及下文“S, whether yu are lking t watch yur favrite TV shws…there are many apps that yu can check ut and dwnlad n yur device.(所以，不管你是想看你最喜欢的电视节目，你都可以在你的设备上查看和下载许多应用程序)”可推知，空格处应该是在讨论有很多应用可在手机上使用。由此可知，E. As we knw, there's a wealth f apps available fr dwnlad, free f charge(正如我们知道的那样，有很多应用可用于下载，并且免费)”符合题意。故选E。