职称英语考试-备考辅导-09年职称英语理工类教材完型填空新增部分(3)

职称英语理工类教材完型填空新增部分(3)Cell Phone Lets Your Secret OutYour cell phone holds secrets about you. Besides the names and1that youve programmed into it, traces of your DNA2linger on the device, according to a new study.DNA is genetic material that2in every cell. Like your fingerprint, your DNA is unique to you3you 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 you6you 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 the7 This made her wonder whether traces of DNA lingered on cell phones-even when no blood was involved. 8she and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones3 of volunteers. They used swabs to collect9traces of the users from two parts of the phone: the outside, where the user holds it, and the, which is placed at the users ear.The scientists scrubbed the phones using a solution made mostlyalcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phonesfor another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.The scientists discovered DNA thatto 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. , 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 theof 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87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 films2. A appeals B appoint C appears D applies3. A because B unless C although D still4. A about B in C for D behind5. A criminals B people C men D policemen6. A when B until C before D than7. A device B paper C file D document8. A However B So C But D Nevertheless9. A invisible B non-existent C visible D apparent. A card B keys C screen D speaker. A of B up C on D into. A upon B back C without D with. A was given B belonged C was owned D became. A Generally B Surprisingly C Disappointedly D Shortly. 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。.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。.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。.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