【单选题】
Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you.Besides the names and (51) that you’ve programmed into it, traces of yourDNA、linger (逗留) on the device, according to a new study.
DNA、is genetic material that (52) in every cell. Like your fingerprint, yourDNA、is unique to you (53) you have an identical twin. Scientists today routinely analyzeDNA、in blood, saliva (唾液), or hair left (54) at the scene of a crime. The results often help detectives identify (55) and their victims. Your cell phone can reveal more about you (56) you might think.
Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the (57) . This made her wonder whether traces ofDNA、lingered on cell phones—even when no blood was involved (58) she and colleague Margaret Wallace of theCity University of New York analyzed the flip-open phones of 10 volunteers. They used swabs (药签) to collect (59) traces of the users from two parts of the phone: the outside, where the user holds it, and the (60) , which is placed at the user’s ear.
The scientists scrubbed the phones using a solution made mostly (61) alcohol. The aim of washing was to remove all detectable traces ofDNA、The owners got their phones (62) for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.
The scientists discoveredDNA、that (63) to the phone’s speaker on each of the phones.Better samples were collected from the outside of each phone, but those swabs also picked upDNA、that belonged to other people who had apparently also handled the phone. (64) ,DNA、showed up even in swabs that were taken immediately after the phones were scrubbed (擦洗). That suggests that washing won’t remove all traces of evidence from a criminal’s device. So cell phones can now be added to the (65) of clues that can decide a crime-scene investigation.
A．card
B．keys
C．screen
D．speaker
网考网参考答案：D
网考网解析：
从上下文语境来看，研究者从手机的两部分收集手机DNA痕迹：一是手机外壳，二是放在使用者耳朵上的______。四个选项中贴在耳朵上的不可能是card，screen和keys，只能是speaker(喇叭，扬声器)。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
Your cell phone holds secrets about you.Besides the names and (51) that you’ve programmed into it, traces of yourDNA、linger (逗留) on the device, according to a new study.
DNA、is genetic material that (52) in every cell. Like your fingerprint, yourDNA、is unique to you (53) you have an identical twin. Scientists today routinely analyzeDNA、in blood, saliva (唾液), or hair left (54) at the scene of a crime. The results often help detectives identify (55) and their victims. Your cell phone can reveal more about you (56) you might think.
Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the (57) . This made her wonder whether traces ofDNA、lingered on cell phones—even when no blood was involved (58) she and colleague Margaret Wallace of theCity University of New York analyzed the flip-open phones of 10 volunteers. They used swabs (药签) to collect (59) traces of the users from two parts of the phone: the outside, where the user holds it, and the (60) , which is placed at the user’s ear.
The scientists scrubbed the phones using a solution made mostly (61) alcohol. The aim of washing was to remove all detectable traces ofDNA、The owners got their phones (62) for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.
The scientists discoveredDNA、that (63) to the phone’s speaker on each of the phones.Better samples were collected from the outside of each phone, but those swabs also picked upDNA、that belonged to other people who had apparently also handled the phone. (64) ,DNA、showed up even in swabs that were taken immediately after the phones were scrubbed (擦洗). That suggests that washing won’t remove all traces of evidence from a criminal’s device. So cell phones can now be added to the (65) of clues that can decide a crime-scene investigation.
A．card
B．keys
C．screen
D．speaker
网考网参考答案：D
网考网解析：
从上下文语境来看，研究者从手机的两部分收集手机DNA痕迹：一是手机外壳，二是放在使用者耳朵上的______。四个选项中贴在耳朵上的不可能是card，screen和keys，只能是speaker(喇叭，扬声器)。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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