Question

【題目】As more people use smart phones to pay bills and store personal information, strict password security has become more important than ever. A new study shows that free-form gestures–sweeping fingers in shapes across the screen of a smart phone—can be used to unlock phones. These gestures are less likely to be observed and reproduced by others than traditional typed passwords.

“All that it takes to steal a password is a quick eye,” said one of the researchers of the study. “With all the personal information we have on our phones today, improving their security is becoming increasingly necessary.” In developing a secure solution to this problem, the researchers studied the practicality of using free-form gestures. With the ability to create any shape in any size and location on the screen, the gestures were popular as passwords. Since users create them without following a template, the researchers predicted these gestures would allow for greater complexity.

The researchers carried out a create-test-retest experiment where 63 people were asked to create a gesture, recall it, and recall it again 10 days later. The gestures were captured on a recognizer system designed by the team. Using this data, they tested the complexity and accuracy of each gesture using information theory. The result of their analysis is that people are favorable to use free-form gestures as passwords.

To put their analysis into practice, the researchers then had seven students in computer science and engineering, each with considerable experience with touchscreens（觸摸屏）, attempt to steal a free-form gesture password by observing a phone user secretly. None of them were able to copy the gestures with enough accuracy. The gestures appear to be extremely powerful against attacks.

Though the testing is in its early stage and widespread adaptation of this technology is not yet clear, the research team plans to continue to analyze the security and management of free–form passwords in the future. They believe this is the first study to explore free-form gestures as passwords. They will soon publish their findings.

【1】What can we learn about free-form gestures?

A. They are improving mobile security in a way.

B. Users will have to make use of simple gestures.

C. They will never be copied by others.

D. Users must move their fingers in fixed shapes.

【2】The experiment in paragraph 4 is to test _________ of free - form gestures.

A. template B. application C. accuracy D. security

【3】According to the text, the researchers think that ________.

A. it is easy to steal any password with a quick eye

B. better ways of setting passwords should be developed

C. people had better not use smart phones to pay bills

D. personal information should not be stored in a phone

【4】The main purpose of the text is to ________.

A. advise people to use free-form gestures

B. discuss whether smart phones are safe

C. talk about the practicality of passwords

D. introduce the study of a new password

Answer 1

【答案】

【1】A

【2】D

【3】B

【4】D

【解析】試題分析：本文是一篇說明文，隨著智能手機(jī)的日益普及，儲存手機(jī)內(nèi)的個人信息和密碼的安全愈發(fā)重要�？茖W(xué)家研究發(fā)現(xiàn)，用手勢或圖案代替?zhèn)鹘y(tǒng)的密碼能加強(qiáng)密碼的保密性。

【1】A 推理判斷題。根據(jù)第一段These gestures are less likely to be observed and reproduced by others than traditional typed passwords.可知，這些姿勢都比傳統(tǒng)的密碼更難窺伺，更難重現(xiàn)，所以某種程度上能提高手機(jī)的安全性，故選A。

【2】D 細(xì)節(jié)理解題。根據(jù)第四段中None of them were able to copy the gestures with enough accuracy.可知，他們都無法準(zhǔn)確地復(fù)制這些姿勢，這也代表手機(jī)無法破解，故選D。

【3】B 細(xì)節(jié)理解題。根據(jù)最后一段...search team plans to continue to analyze the security and management of free – form passwords in the future.（研究團(tuán)隊計劃繼續(xù)分析未來的自由模式密碼的安全性和管理。）可知，the research team將繼續(xù)在該領(lǐng)域展開研究，即他們認(rèn)為應(yīng)研發(fā)更好的密碼系統(tǒng)。故選B。

【4】D 主旨大意題。根據(jù)全文內(nèi)容可知，本文主要講述自由形式的手勢可用來提高智能手機(jī)的安全性，例如，在智能手機(jī)的屏幕上揮舞手指形成某種圖案。故選D。

【學(xué)法指導(dǎo)】

抓住文章主線和關(guān)鍵詞語，歸納文章中心

要注意不是所有的段落都有主題句，有時主題句暗含在句中。閱讀這樣的文章，就需要自己根據(jù)文章的細(xì)節(jié)來分析，概括出段落的主題，從而推導(dǎo)出文章的主旨。分析的方法是：先弄清該段落主要講了哪幾方面的內(nèi)容，這些內(nèi)容在邏輯上有什么聯(lián)系，然后加以歸納形成主題�！�4】D 主旨大意題。根據(jù)全文內(nèi)容可知，本文主要講述自由形式的手勢可用來提高智能手機(jī)的安全性，例如，在智能手機(jī)的屏幕上揮舞手指形成某種圖案。故選D。