medicines.

　　Traces of anywhere from hundreds to thousands of different molecules turned up on each phone. The molecules reflected 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 high­end cosmetics (化妆品), dyes 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 behavioral 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.

　　语篇解读：本文是说明文。研究发现，通过分析遗留在手机上的化学物质可以了解手机使用者的生活方式。

　　5．By analyzing 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。由第一段中的"By analyzing them, scientists might be able to piece together a story about your recent life"和倒数第二段中的"We could tell if a person is likely female, uses high­end cosmetics, dyes her hair, drinks coffee, prefers beer over wine or likes spicy food."可推知，通过分析遗留在手机上的化学物质可以了解手机使用者的生活方式。

　　6．What was the first thing the researchers had to do for the study?

　　A．Comparing different chemicals.

　　B．Hiring volunteers with cellphones.

　　C．Collecting the chemicals from phones.

　　D．Building a database containing chemicals.

　　解析：选D　细节理解题。由第四段中的"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."可知，研究员们所做的第一项工作是建立数据库。

　　7．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。由末段中的"But detectives might one day use such data to track down someone who left a phone behind at a crime scene."可推知，作者对研究结果的实用性