人教版 (2019)必修 第二册Unit 3 The internet习题

这是一份人教版 (2019)必修 第二册Unit 3 The internet习题，共5页。试卷主要包含了secant n，extensin n，accuracy n等内容，欢迎下载使用。

As data and identity theft becmes mre and mre cmmn，the market is grwing fr bimetric（生物测量）technlgies-like fingerprint scans-t keep thers ut f private e-spaces. At present，these technlgies are still expensive，thugh.
Researchers frm Gergia Tech say that they have cme up with a lw-cst device（装置）that gets arund this prblem ： a small keybard. This smart keybard precisely measures the cadence（节奏）with which ne types and the pressure fingers apply t each key. The keybard culd ffer a strng layer f security by analyzing things like the frce f a user's typing and the time between key presses. These patterns are unique t each persn. Thus，the keybard can determine peple's identities，and by extensin，whether they shuld be given access t the cmputer it's cnnected t-regardless f whether smene gets the passwrd right.
It als desn't require a new type f technlgy that peple aren't already familiar with. Everybdy uses a keybard and everybdy types differently.
In a study describing the technlgy，the researchers had 100 vlunteers type the wrd "tuch" fur times using the smart keybard. Data cllected frm the device culd be used t recgnize different participants based n hw they typed，with very lw errr rates. The researchers say that the keybard shuld be pretty straightfrward t cmmercialize and is mstly made f inexpensive，plastic-like parts. The team hpes t make it t market in the near future.
词汇积累
l. precisely adv.精确地；确切地2.secant n.安全，保证
3.extensin n.延伸，扩大商业化
5.accuracy n.准确性；精确度
1.Why d the researchers develp the smart keybard？
A. T reduce pressure n keys
B. T imprve accuracy in typing
C. T replace the passwrd system
D. T cut the cst f e-space prtectin.
2.What makes the inventin f the smart keybard pssible？
A. Cmputers are much easier t perate.
B. Fingerprint scanning techniques develp fast.
C. Typing patterns vary frm persn t persn.
D. Data security measures are guaranteed.
3.What d the researchers expect f the smart keybard？
A. It'll be envirnment-friendly.
B. It'll reach cnsumers.
C. It' ll be made f plastics.
D. It' ll help speed up typing.
4. Where is this text mst likely frm?
A. A diary B. A guidebk C. A nvel D. A magazine
Ⅱ.七选五（2019课标全国Ⅲ，★★☆）
In an nline class，develping healthy pattens f cmmunicatin with prfessrs is very imprtant. 1 While I have nly listed tw f each，there are bviusly many ther situatins that can arise. Students shuld be able t extend the lgic（逻辑）f each t their particular circumstance.
D’s
● 2 Questins abut subject cntent are generally welcmed. Befre asking questins abut the curse design, read the syllabus（教学大纲）and learning management system infrmatin t be sure the answer isn't hiding in plain sight.
● Participate in discussin frums（论坛），blgs and ther pen-ended frums fr dialgue. 3 Be sure t stay n tpic and nt ffer irrelevant infrmatin. Make a pint and make it safe fr thers t d the same.
Dn'ts
● Dn't share persnal infrmatin r stries. Prfessrs are nt trained nurses，financial aid experts r yur best friends. If yu are in need f a deadline extensin，simply explain the situatin t the prfessr. 4
● Dn't penly express annyance at a prfessr r class， 5 When a student attacks a prfessr n the scial media，the language used actually says mre abut the student. If there is truly a cncern abut a prfessr's prfessinalism r ability，be sure t use nline curse evaluatins t calmly ffer yur cmments.
A. That's what they are fr.
B. Turn t an nline instructr fr help.
C. If mre infrmatin is needed，they will ask.
D. Remember that nline prfessrs get a lt f emails.
E. Belw are sme cmmn d's and dn'ts fr nline learners.
F. Everyne has taken a nt-s-great class at ne time r anther.
G. Ask questins，but make sure they are gd，thughtful questins.
词汇积累
1. prfessinalism n.专业水平
2. plain adj.清楚的；明白的；易懂的
3.evaluatin n.评价；估计
1.______ 2. _____ 3. _____ 4. _____ 5. _______
参考答案及解析
Ⅰ.◎语篇解读本文是一篇说明文，主题语境是科学与技术主題语境内容为科技发展。文章介绍了 Gergia Tech的研究者们想出了一种低成本的装置——智能键盘，来保护私人的电子空间，并希望这种设备能尽快进入市场，服务消费者。本文侧重培养学生的创新能力。
1.D细节理解题。本题题干意为：研究者们为什么研发智能键盘？根据文章第一段可知，现在一些阻止别人进入私人电子空间的技术成本仍然很高。因此，来自 Gergia Tech的研究者们想出了一种低成本的（lw-cst）装置—智能键盘，来应对这个问题。所以答案为D项：减少电子空间保护的成本。A：减轻对按键的压力；B：提升打字的精确度；C：取代密码系统。
2.C细节理解题。本题题干意为：什么使智能键盘这项发明成为可能？根据第二段第四句“These patterns are unique t each persn.，可知，因为每个人的打字模式各不相同，所以智能键盘能识别人的身份，保护人的隐私。所以答案为C项：打字模式因人而异。A：计算机很容易操作；B：指纹扫描技术发展很快；D：数据安全措施有保证。
3.B细节理解题。本题题干意为：研究者们对智能键盘期待什么？根据文章最后一段最后两句话，研究者们说键盘应该直接商业化，智能键盘主要是由价格低廉的塑料类配件制成团队希望它在不久的将来进入市场。所以答案为B项（它将很快到达消费者手里）。A：它将是环保的；C：它将用塑料制造。此项为干扰项，用塑料制造是事实，但不是将来发生的事；D：它将有助于加速打字
4.D推理判断题。本题题干意为：这篇文章最有可能来自哪里？文章介绍了一种新的保护电子隐私空间的设备—智能键盘，并且希望产品能很快走进市场。本文语言客观严谨，属于科普类文章，故答案为D项：杂志。A：日记；B：指导手册；C：小说
Ⅱ.◎语篇解读本文体裁为说明文。主题语境为人与社会，主题语境内容为社会交往。文章针对如何与在线课程教授沟通为学生提出了一些建议。本文侧重培养学生的学习能力。
1.E过渡句。设空处前提出与在线（nline）课程教授有着良好的沟通很重要，下文介绍了该做的和不该做的事情因此答案为E项
2.G主题句。根据Ds和 Dn'ts中各段首句的特点可知，设空处为主题句并且是祈使句，设空处后一句中的关键词questins与G项中的 questins对应，因此答案为G项。
3.A细节句。由设空处前面的句子 Participate in discussin frums，blgs and ther pen-ended frums fr dialgue.中的关键信息可知，A项中的That指代 dialgue，they指代 discussin frums，blgs and ther pen-ended frums，因此答案为A项。
4.C细节句。本段建议学生不要和教授聊个人话题，你在说完和教授沟通的内容之后，如果有必要，教授会进一步向你提问，因此答案为C项。
5.F细节句。本段建议学生如果对教授的课程有意见，不要公开发表不满，所以空格处的内容应与本段话题一致，F项提到每个人都曾经上过不太好的课，与前后文内容相关联，因此答案为F项。