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2017年理工類職稱英語C級完形填空專項練習
新一輪職稱英語備考即將開始，yjbys網小編為幫助考生高效備考職稱英語考試，以下是yjbys網小編整理的關于2017年理工類職稱英語C級完形填空專項練習，供大家備考。
Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you. Besides the names and__________ (1) that you've programmed into it, traces of your DNA linger (逗留 ) 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 (唾液) , 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 University in 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 phones of 10 volunteers. They used swabs (藥簽) 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 user's 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 phone's 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(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__________ (15) of clues that can decide a crime-scene investigation.
1. A. numbers
B. music
C. secrets
D. films
2. A. appeals
B. appoints
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. Nevertheless
D. But
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
答案與解析：
1.A。根據我們的常識，人們通常在手機中儲存人名和電話號碼。所以A是最佳選擇。雖然手機中也能儲存音樂、秘密信息和影片，相比之下，不如A合理。
2.C。從上下文語境來看，DNA是一種存在于每一細胞中的基因物質。根據這一理解，選項A、B、D均不是答案。
3.B。從上下文語境來看，如同指紋，你的DNA是獨一無二的，所以此處只能選擇unless。其他選擇均不符合句意，也違背了我們對DNA的基本認識。
4.D。這里考查的是固定搭配leave behind(留下)。
5.A。從上下文語境來看，研究結果是用來幫助偵探識別罪犯和受害人的，B、C、D都不能表達這一層意思。
6.D。這里考查的是比較結構，句子中的more提供了選擇的線索，表明這里是比較，所以選擇than。
7.A。從上文語境來看，犯罪嫌疑人的手機沾上了血跡，隨后就扔了。這里顯然是扔掉了手機cell phone，所以選擇device，其他選項均不能指代cell phone。
8.B。這里考查的是句子間的邏輯關系。從上下文語境來看，她思考微量DNA是否會停留在手機上，因此她與同事們一起對10名志愿者的翻蓋手機進行了分析研究。四個選項分別代入，只有so表示因果關系最合適，A、C、D表示的都是轉折關系。
9.A。從上下文語境來看，這里搜集的traces指的是DNA traces(DNA痕跡)，而DNA traces是肉眼看不到的，所以選擇invisible(看不見的)。
10.D。從上下文語境來看，研究者從手機的兩部分收集手機上的DNA痕跡：一是手機外殼，二是放在使用者耳朵上的揚聲器。四個選項中貼在耳朵上的不可能是card，screen和keys，只能是speaker(喇叭，揚聲器)。
11.A。這里考查的是固定短語be made of(由……制成)。a solution made mostly ofalcohol：一種主要由酒精制成的溶液。
12.B。從上下文語境來看，應該選擇back：手機擁有者拿回了手機，再使用一個星期。
13.B。從原文的介詞to來看，只有be given to(被給予)和belong to(屬于)搭配，另外兩個選項不搭配to。從上下文語境來看，科學家在每一部手機上發現了手機擁有者的DNA，顯然belong to符合語境。
14.B。下文告訴我們手機經過清洗后仍然有微量DNA出現。所以這里要用surprisingly這個副詞，表示令人驚訝。
15.D。從上下文的語境來看，手機可以被加入到決定犯罪現場調查的線索的名單上。四個選項中只有list(名單)符合語境，其他三個選項與句子的意思不符。
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