Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you. Besides the names and 1 that youve programmed into it, traces of your DNA2linger on the device, according to a new study.
DNA is genetic material that 2 in every cell. Like your fingerprint, your DNA is unique to you 3 you have an identical twin. Scientists today routinely analyze DNA in blood, saliva, or hair left 4 at the scene of a crime. The results often help detectives identify 5 and their victims. Your cell phone can reveal more about you 6 you might think.
Meghan J. McFadden, a scientist at McMaster University1in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the 7 This made her wonder whether traces of DNA lingered on cell phones--even when no blood was involved. 8 she and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones3 of 10 volunteers. They used swabs to collect 9 traces of the users from two parts of the phone: the outside, where the user holds it, and the 10 , which is placed at the users ear.
The scientists scrubbed the phones using a solution made mostly 11 alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones 12 for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.
The scientists discovered DNA that 13 to the phones speaker on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also handled the phone. 14 , DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing wont remove all traces of evidence from a criminals device. So cell phones can now be added to the 15 of clues that can clinch a crime-scene investigation.
词汇
linger v.逗留 flip-open phone 翻盖手机
genetic adj.遗传的 swab n. 药签
saliva n. 涎,唾液 scrub v. 用力擦洗;擦净
bleed v. 流血 clinch v.确定,决定
注释:
1.McMaster University:麦克马斯特大学,位于加拿大安大略省汉密尔顿市,成立于1887年。
2.DNA:脱氧核糖核酸。系deoxyribonucleic acid的缩写。 .
3.flipopen phones:翻盖手机。又可作flip phones。
练习:
1. A numbers B music C secrets D films
2. A appeals B appoint C appears D applies
3. A because B unless C although D still
4. A about B in C for D behind
5. A criminals B people C men D policemen
6. A when B until C before D than
7. A device B paper C file D document
8. A However B So C But D Nevertheless
9. A invisible B non-existent C visible D apparent
10. A card B keys C screen D speaker
11. A of B up C on D into
12. A upon B back C without D with
13. A was given B belonged C was owned D became
14. A Generally B Surprisingly C Disappointedly D Shortly
15. A explanation B discovery C book D list
答案与解析:
1.A人们通常在手机中储存人名和他们的电话号码。所以A是最佳选择。虽然手机中也能储存音乐和秘密信息,相比之下,不如A合理。至于储存电影片子,就有点离谱了。
2.C这个句子的意思是:DNA是一种存在于每一细胞中的基因物质。根据这一理解,选项A、B、D均不能选作答案。
3.B上文的意思是:如同指纹,你的DNA是独一无二的。因此,此处必须选择unless,其他选择均不符合句义,也违背了我们对DNA的基本常识。 4.D leave behind是固定搭配,意即:留下。此处leave使用的是过去分词形式。
5.A根据上下文的理解,研究结果是用来帮助侦探识别罪犯和受害人的,8、c、D都不能表达这一层意思。
6.D句子中的more提供了选择的线索,morethan的搭配最能完成该句的意思。
7.A定冠词the说明该选项所指内容在前面已经提到,即cell phone。除了device,其他选项均不能指代cell phone。
8.B 四个选项中只有B是正确选择。s0连接了其前后两个句子,使其形成因果关系:她思考微量DNA是否会停留在手机上,所以,她与同事们一起对10名志愿者的翻盖手机进行了分析研究。A、C、D表示的都是转折的意义关系。
9.A句子当中的paces指的是DNA traces(微量DNA),而DNA paces是肉眼看不到的,所以选择invisible。
10.D研究者从手机的两部分收集手机微量DNA:一是手机外壳,二是喇叭。贴在耳朵上的不可能是card、screen和keys。
11.A be made of是固定搭配,意即:由制成。a solution made mostly of alcohol:一种主要由酒精制成的溶液。
12.B根据上下文的理解,应该选择back:手机拥有者拿回了手机,再使用一个星期。
13.B 该句要表达的意思应该是:科学家在每一个手机上发现了属于手机拥有者的DNA。belong t0是固定搭配,意思是:属于。A不符合句义,c和D不符合语法。
14.B最后一段的第一和第二句告诉我们手机经过清洗后仍然有微量DNA出现。所以这里
要用surprisingly这个副词,表示令人惊讶。
15.D根据上下文的理解,应该选择D,其它三个选项与句子的意思不符。
中国将查处“僵尸政府网站”
IT大佬两会提议“智慧民生”
聚焦“军队反腐”
环境污染责任险
长江中游“城市群”规划获批
各地掀起“自贸区热”
“个人游”、“一签多行”将优化调整
“足改方案”出台
深入实施“军民融合”发展战略
政府工作报告中常用的三字表达[1]
北京禁止“电动轮滑车”上路
支付宝“十年账单”
卫计委:不允许“互联网医疗诊治”
八部委整顿“网络售彩”
中国外贸要“优进优出”
适时启动“深港通”试点
柴静“雾霾纪录片”引热议
“假离婚”夫妇迎来复婚潮
中国下调“GDP增长目标”
我国鼓励民资参与“养老服务业”发展
“中国科幻”走向世界
今年将推进“反腐败立法”
首趟“义新欧”国际班列回家
德翼失事客机未发出“求救信号”
“任性”和“铁帽子王”让翻译纠结
“非组织政治活动”危害严重
“卢布贬值”连累中国天气预报
万众一心开创“四个全面”新局面
“人民币跨境支付系统”年底推出
官员不作为 总理“怒拍桌”
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |