Ⅰ.阅读理解
(2021·山东省部分重点中学考试)
Love the way you walk
Listen carefully to the footsteps，and you can work out who is walking.The features commonly used to identify people are faces and fingerprints.But the way they walk is also a giveaway.
Researchers have used video cameras and computers to analyze people's gaits(步态).But translating such knowledge into a practical identification system can be tricky.Cameras are often visible，require good lighting and may have their view blocked by other people.A team led by Dr.Ozanyan and Dr.Scully have been looking for a better way to recognize gaits.Their answer：pressuresensitive mats.
Such mats are nothing new.They have been part of security systems.But Ozanyan and Scully use a complicated version that can record the amount of pressure applied in different places as someone walks across it.The researchers turn to an artificial intelligence system to recognize such patterns.In a study in 2018，they tested the system on a database of footsteps of 127 people.They found its error rate in identifying who was who was a mere 0.7%.And Scully says even without a database of footsteps，the system can determine someone's sex and a subject's age.
One application of the matbased gaitrecognition system might be in health care，particularly for the elderly.A mat placed in a nursing home or an old person's own residence could monitor changes in an individual's gait that indicate certain illnesses.That would provide early warning of someone being at greater risk of falling over.Gait analysis might also be used as a security measure in the workplace，monitoring access to restricted areas，such as parts of military bases，server farms or laboratories dealing with dangerous materials.Perhaps the most interesting use of the mats，though，would be in public places，such as airports.
语篇解读 脸和指纹常被用来识别人，其实人们走路的方式也可以用来识别人。本文介绍了通过人的步态识别人的“压力感应垫”的工作原理以及使用前景等。
1．What is mainly talked about in Paragraph 2?
A．Research equipment. B．Research background.
C．Research assumptions. D．Research findings.
B [考查段落大意。通读第二段可知，该段说明研究人员使用过摄像机和电脑来分析人们的步态，但由于受光线和视线等因素的影响，摄像机使用很不方便。因此Dr.Ozanyan和Dr.Scully带领的团队一直在寻找一种更好的步态识别方法，并给出答案：压力感应垫。据此可知，第二段介绍了“压力感应垫”的研究背景，故B项正确。]
2．What is the mat used for?
A．Collecting data. B．Ensuring safety.
C．Determining age. D．Analyzing pressure.
A [考查细节理解。根据第三段第三句“But Ozanyan and Scully use a complicated version that can record the amount of pressure applied in different places as someone walks across it”可知，当人们走过时，这种垫子可以记录在不同地方施加的压力数据；据此可知，垫子是用来搜集压力数据的，故A项正确。]
3．What might the gaitrecognition system be applied to?
A．Monitoring security work progress.
B．Detecting potential health problems.
C．Keeping track of travelling frequency.
D．Warning passengers of possible dangers.
B [考查细节理解。根据尾段，尤其是该段第二、三句可知，这种垫子用在养老院或老人家里可以监测老人步态变化，从而为人们提供某些疾病的早期预警，故B项正确。]
4．What is the main purpose of the passage?
A．To compare different ways to identify people.
B．To show people the importance of technology.
C．To persuade people to buy the mat.
D．To inform people of something about pressuresensitive mats.
D [考查写作目的。通读全文可知，本文介绍了一种通过人的步态来识别人的“压力感应垫”；文章重点介绍了“压力感应垫”的工作原理以及使用前景等。据此可知，D项正确。]
