职称英语理工类A完形填空练习2017
完形填空是职称英语考试常考题型，离2017年职称英语考试已经没有多少时间，为了帮助大家备考职称英语理工完形填空题，小编整理了一些理工类A级完形填空练习，希望能帮到大家!
Why India Needs Its Dying Vultures
The vultures (秃鹰) in question may look ugly and threatening, but the sudden sharp decline in three species of India's vultures is producing alarm rather than celebration, and it presents the world with a new kind of environmental problem. The dramatic__________(51) in vulture numbers is causing widespread disruption to people living in the__________(52) areas as the birds. It is also causing serious public health problems __________(53) the Indian sub-continent.
While their reputation and appearance may be unpleasant to many Indians, vultures have__________(54)played a very important role in keeping towns and villages all over India __________(55) It is because they feed on dead cows. In India, cows are sacred animals and are__________ (56) left in the open when they die in their thousands upon thousands every year.
The disappearance of the vultures has __________(57) an explosion in the numbers of wild dogs feeding on the remains of these__________ (58) animals. There are fears that rabies (狂犬症) may increase as a result. And this terrifying disease may ultimately (最终) affect humans in the region, __________ (59) ild dogs are its main carriers. Rabies could also spread to other animal species, __________(60) an even greater problem in the future.
The need for action is __________ (61), so an emergency project has been launched to find a solution to this serious vulture problem. Scientists are trying to__________ (62) the disease causing the birds' deaths and, if possible, develop a cure.
Large-scale vulture__________(63) were first noticed at the end of the 1980s in India. A population survey at that time showed that the three species of vultures had declined__________ (64)over 90 per cent. All three species are now listed as "critically endangered". As most vultures lay only single eggs and__________ (65) about five years to reach maturity, reversing their population decline will be a long and difficult exercise.
51.A. increase
B. threat
C. risk
D. decline
52.A. small
B. different
C. same
D. safe
53.A. above
B. with
C. across
D. through
54.A. rarely
B. long
C. recently
D. seldom
55.A. dangerous
B. clean
C. smelly
D. beautiful
56.A. immediately
B. occasionally
C. hardly
D. traditionally
57.A. acted as
B. led to
C. come from
D. slowed down
58.A. dead
B. strange
C. wild
D. endangered
59.A. when
B. so
C. whether
D. since
60.A. improving
B. causing
C. predicting
D. finding
61.A. frequent
B. regular
C. urgent
D. sudden
62.A. identify
B. prove
C. test
D. check
63.A. injuries
B. deaths
C. arrivals
D. attacks
64.A. in
B. on
C. along
D. by
65.A. waste
B. consume
C. take
D. adopt
答案与解析
51.D。考查词汇。题干：秃鹰数量的急剧__________ 给生活在__________ 地区的人们带来破坏。从上下文语境来看，通篇文章都在叙述秃鹰濒临灭绝对印度环境的负面影响，而且文章的标题中的dying vultures也提供了线索。decline符合上下文的意思，意为“秃鹰的数量在急剧减少”。increase与上下文的意思相反。故D为正确答案。
52.C。考查固定搭配。题干：秃鹰数量的急剧减少给生活在与鸟__________ 地区的人们带来破坏。从上下文语境来看，秃鹰数量的急剧减少不仅是这些鸟类的灾难，对当地居民同样也是如此，the same as意为“和……一样”，为固定搭配。故C为正确答案。
53.C。考查介词。题干：这也给__________ 印度次大陆带来了公共健康的问题。从上下文语境来看，四个选项中只有across the Indian sub.continent(整个印度次大陆)符合题干，故C为正确答案。
54.B。考查副词。题干：虽然它们的声誉和外观可能对许多印度人是不愉快的，但是秃鹰__________ 在维护印度城镇和乡村的__________ 方面扮演了非常重要的角色。从上下文语境来看，四个选项代入后，long意为“长期以来一直起作用”，合乎上下文的意思，故B是正确答案。
55.B。考查词汇。题干：虽然秃鹰的名声不好，许多印度人也讨厌其长相，但是长久以来，秃鹰在维护全印度的城镇和乡村的__________ 方面扮演了非常重要的角色。因为秃鹰是以死牛为生。四个选项分别代入后，B选项clean(清洁的)符合题干要求，其他选项dangerous意为“危险的”，smelly意为“有臭味的”，beautiful意为“漂亮的”，均不符合题干要求，故B是正确答案。
56.D。考查词汇。题干：在印度，牛是神圣的动物，因而死后__________ 露尸户外，任其腐烂。露尸户外是印度的传统，所以此处填traditionally“传统地”。选项immediately意为“立即地”，occasionally意为“偶尔地”，hardly意为“几乎不”，都不通，因此D为正确选项。
57.B。考查固定搭配。题干：秃鹰的消失—__________ 以__________ 动物为生的野狗数量暴增。表达的是因果关系。“the disappearance ofthe vultures”是因，“all explosion in the numbers of wild dogs feeding on the remains ofthese dead animals”是果，四个选项中只有lead to(导致)能表达这种因果关系，使题干很通顺。因此B为正确选项。
58.A。考查词汇。题干：秃鹰的消失导致以__________ 动物为生的野狗数量暴增。从上下文语境来看，应该是死的动物，因此A为正确选项。
59.D。考查状语从句。题干：这种可怕的疾病最终会影响当地的居民，__________ 野狗是狂犬病的主要携带者。前后是因果关系，四个选项中只有since(由于，因为)能表达这种因果关系。因此D为正确选项。
60.B。考查词汇。题干：狂犬病也可能传播到其他生物，__________ 更大的问题。从上下文语境来看，前后为因果关系，所以B选项causing(导致)为正确答案。
61.C。考查词汇。题干：采取行动的需求是__________ 。从上下文语境来看，空格后提到了“启动了应急项目”，可以推断要选的形容词是urgent(紧迫的)，意为“采取行动已刻不容缓”，故C为正确选项。
62.A。考查词汇。题干：科学家们正试图__________ 导致秃鹰死亡的疾病，如果可能的话，找到治愈该病的方法。四个选项分别代入后，identify(确定)比较符合语境，故A为正确选项。
63.B。考查词汇。题干：在印度，人们注意到秃鹰的大批__________ 最早是在20世纪80年代。根据上下文语境，deaths可使全段的意思连贯，故B为正确选项。
64.D。考查词汇。题干：根据当时的物种调查显示，三种秃鹰的数量减少了90%以上。四个选项中只有by有“到(某事物)的程度”的意思。故c为正确选项。
65.C。考查词汇。题干：由于大部分秃鹰每次只产一只蛋，幼鹰__________ 大约5年的时间才能成熟，因此，若想遏制住秃鹰数量的下降会是一项长期的、艰巨的任务。“花费或用多少时间”英语的常用的表达法是“take…days/months/years”，其他三个选项都不合适，故C为正确选项。
CellPhone Lets Your Secrets Out
Your cell phone holds secrets about you.Besides the names and numbers that you've programmed into it, ______traces____(51) of your DNA linger (遗留) on thedevice according to a new study
DNA is genetic (遗传的)material _____that_____ (52) appears in every cell. Like your fingerprint, yourDNA is _____unique______ (53) to you——unless you have an identical twin. Scientiststoday analyze DNA in blood, saliva (唾液), orhair left ____behind_______ (54) at the scene of a crime. The results oftenhelp detectives identify ____criminals______ (55) and their victims. Your cellphone can reveal more about you ____than_____ (56) you might think.
Meghan J. McFadden, a scientist at McMasterUniversity in Hamilton, Ontario, heard about a crime in which the suspect bledonto a cell phone and later dropped the____device_____ (57). This made herwonder whether traces of DNA lingered on cell phones一evenwhen no blood was___involved_____(58). She and colleague Margaret Wallace ofthe City University of NewYork analyzed the flip-open phones(翻盖手机)of10 volunteers. They used swabs (药签) tocollect _____invisible___ (59) traces of the users from two parts of the phone:the outside, where the user ____holds_____(60) it, and the speaker which isplaced at the user's ear
The scientists cleaned the phones using asolution made mostly__of____(61) alcohol. The aim of washing was to remove alldetectable traces of DNA. The owners got their phones back for another week.Then the researchers ___returned________ (62) the phones and cleaned each phoneonce more.
The scientists discovered DNA that _____belonged______(63) to the phone's speaker on each of the phones. Better samples werecollected from the outside of each phone, but those swabs also picked up DNAthat belonged to other people who had apparently also ____handed______ (64) thephone
Surprisingly, DNA showed up even in swabsthat were taken immediately after the phones were scrubbed. That suggests thatwashing won't remove all traces of ___evidence________ (65) from a criminal'sdevice. So cell phones can now be added to the list of clues that can clinch (确定)a crime-scene investigation.
51. A. name B.pictures C. shapes D. traces
答案：d
52. A. that B. while C.as D.what
答案：a
53. A. common B. good C. helpful D. unique
答案：d
54. A. behind B. away C. aside D.over
答案：a
55. A. visitors B. travelers C.scientists D.criminals
答案：d
56. A. until B. before C.unless D. than
答案：d
57. A. paper B. document C. device D.file
答案：c
58. A. checked B. involved C. tested D. gathered
答案：b
59. A. invisible B.emotional C. poisonous D. magical
答案：a
60. A. holds B. watches C. drops D. covers
答案：a
61. A. with B.by C. for D. of
答案：d
62. A. collected B. answered C. returned D. used
答案：c
63. A. moved B.changed C. belonged D.turned
答案：c
64. A bought B. repaired C.seen D. handed
答案：d
65. A. smell B. evidence C.sound D.color
答案：b
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