C
(2019·大庆高一检测)
Every time your fingers touch your cell phone, they leave behind trace of amounts of chemicals. And each chemical offers clues to you and your activities. By studying them, scientists might be able to piece together a story about your recent life, a new study finds.
A molecule (分子) is a group of atoms. It represents the smallest amount of some chemicals. Your skin is covered in molecules picked up by everything you touched. With each new thing your skin contacts, you leave behind some small share of what it’d touched earlier.
Researchers at the University of California, San Diego (UCSD) recently studied such chemical leftovers on the phones of 39 volunteers. The study was led by biochemist Amina Bouslimani. To explore those residues (剩余物), the UCSD team wiped the surface of each volunteer’s phone with a cotton swab (药签). The scientists also swabbed each person’s right hand. Then the researchers compared the chemicals found on each cell phone.
The scientists discovered as many of the molecules as they could. They then compared those to a database of chemicals. Pieter Dorrestein, a UCSD pharmaceutical chemist, had helped set up that database a few years earlier, which contains various substances, including spices, caffeine and medicines.
Traces of everything from hundreds to thousands of different molecules turned up on each phone. The molecules suggested what had been in the body, and what each person had handled before touching the phone. From all these molecules, Bouslimani says, “We could tell if a person is likely female, uses high-end cosmetics (化妆品), colors her hair, drinks coffee, prefers beer over wine or likes spicy food. ”
Police already use molecular analyses to look for traces of explosives or illegal drugs. To date, Dorrestein says, he’s never heard of police using phone residues to narrow down behaviour clues to search for a suspect. But detectives might one day use such data to track down someone who left a phone behind at a crime scene.
【文章大意】本文是一篇说明文。文章讲述的是“手指在你的手机上留下关于你的线索。” 通过研究手机上的残留物, 我们可以得出手机用户的生活方式。
28. By studying the residues on the phone, we can conclude its user’s ______.
A. personality B. lifestyle
C. appearance D. intelligence
【解析】选B。推理判断题。根据第一段Every time your fingers touch your cell phone, they leave behind trace of amounts of chemicals. And each chemical offers clues to you and your activities. By studying them, scientists might be able to piece together a story about your recent life, a new study finds. (每次你的手指触碰手机时, 都会留下微量的化学物质。每种化学物质都为你和你的行为提供线索。一项新的研究发现, 通过研究它们, 科学家们也许能够拼凑出一个关于你最近生活的故事。)可知, 通过研究手机上的残留物, 我们可以得出手机用户的生活方式。
29. What was the first thing the researchers had to do for the study?
A. Comparing different chemicals.
B. Hiring volunteers with cell phones.
C. Collecting different kinds of phones.
D. Building a database containing chemicals.
【解析】选D。推理判断题。根据第四段The scientists discovered as many of the molecules as they could. They then compared those to a database of chemicals. Pieter Dorrestein, a UCSD pharmaceutical chemist, had helped set up that database a few years earlier, which contains various substances, including spices, caffeine and medicines. (科学家们发现了尽可能多的分子。然后他们将这些数据与化学数据库进行比较。加州大学圣地亚哥分校(UCSD)的药理学家彼得·多瑞斯坦(Pieter Dorrestein)几年前帮助建立了这个数据库, 其中包含各种物质, 包括香料、咖啡因和药物。)可知, 研究人员要做的第一件事是建立包含化学品的数据库。
30. What’s the author’s attitude towards the application of the research finding?
A. Doubtful. B. Disappointed.
C. Positive. D. Uninterested.
【解析】选C。推理判断题。根据最后一段Police already use molecular analyses to look for traces of explosives or illegal drugs. To date, Dorrestein says, he’s never heard of police using phone residues to narrow down behaviour clues to search for a suspect. But detectives might one day use such data to track down someone who left a phone behind at a crime scene. (警方已经使用分子分析来寻找爆炸物或非法毒品的踪迹。Dorrestein说, 到目前为止, 他从来没有听说过警察使用手机残留物来缩小行为线索来寻找嫌疑人。但是有一天侦探们可能会利用这些数据来追踪某个把手机落在犯罪现场的人。)可推知, 作者对研究发现的应用持“积极的”态度。
31. What should be the best title for the text?
A. Cell Phones Will Be Used in More Fields.
B. Molecules Are Used to Search for Illegal Drugs.
C. Your Phone May Be Home to Various Chemicals.
D. Fingers Leave Clues About You on Your Phone.
【解析】选D。主旨大意题。根据第一段Every time your fingers touch your cell phone, they leave behind trace of amounts of chemicals. And each chemical offers clues to you and your activities. By studying them, scientists might be able to piece together a story about your recent life, a new study finds. (每次你的手指触碰手机时, 都会留下微量的化学物质。每种化学物质都为你和你的行为提供线索。一项新的研究发现, 通过研究它们, 科学家们也许能够拼凑出一个关于你最近生活的故事。)可知, D项Fingers Leave Clues About You on Your Phone. 可用作本文标题。
