2016年12月大学英语四级考试真题(第三套).docx
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1、2016年12月英语四级真题名师解析配套视频2016年12月大学英语四级考试真题(第3套)Part IWriting(30 minutes)Directions: For this part, you are allowed 30 minutes to write an essay. Suppose you have twooptions upon graduation: one is to work in a state-owned business and the other in ajoint venture. You are to make a choice between the t
2、wo. Write an essay to explain thereasons for your choice.You should write at least 120 words but no more than 180words.Part IIListening Comprehension(25 minutes)说明:由于2016年12月四级考试全国共考了2套听力,本套真题听力与前2套内容完全一样,只是顺序不一样,因此在本套真题中不再重复出现。Part Reading Comprehension (40 minutes)Section ADirections: In this sect
3、ion, there is a passage with ten blanks. You are required to select one wordfor each blank from a list of choices given in a word bank following the passage. Read thepassage through carefully before making your choices.Each choice in the bank isidentified by a letter. Please mark the corresponding l
4、etter for each item on AnswerSheet 2 with a single line through the centre. You may not use any of the words in thebank more than once.Questions 26 to 35 are based on the following passage.Many men and women have long bought into the idea that there are male and female brains,believing that explains
5、 just about every difference between the sexes. A new study26that belief,questioning whether brains really can be distinguished by gender.In the study, Tel Aviv University researchers27for sex differences throughout the entirehuman brain.And what did they find? Not much. Rather than offer evidence f
6、or28brains as male orfemale, research shows that brains fall into a wide range, with most people falling right in themiddle.Daphna Joel, who led the study, said her research found that while there are some gender-based29, many different types of brain cant always be distinguished by gender.While the
7、 average male and average female brains were30different, you couldnt tell itby looking at individual brain scans. Only a small31of people had all-male or all-femalecharacteristics.Larry Cahill, an American neuroscientist ( 神经科学家), said the study is an important addition toa growing body of research
8、questioning32beliefs about gender and brain function. But hecautioned against concluding from this study that all brains are the same,33of gender.Theres a mountain of evidence34the importance of sex influences at all levels of brainfunction, he told The Seattle Times.If anything, he said, the study3
9、5that gender plays a very important role in the brain- evenwhen we are not clear exactly how. A.abnormalB.appliedC.brieflyD.categorizingE.challengesF.figureG.percentageH.provingI.regardlessJ.searchedK.similaritiesL.slightlyM.suggestsN. tastes0.traditionalSection BDirections:In this section,you are g
10、oing to read a passage with ten statements attached to it. Eachstatement contains information given in one of the paragraphsIdentify the paragraphfrom which the information is derivedYou may choose a paragraph more than onceEach paragraph is marked with a letterAnswer the questions by marking thecor
11、responding letter on Answer Sheet 2Can Burglars Jam Your Wireless Security System?A.Any product that promises to protect your home deserves careful examinationSo it isnt surprising thatyou11 find plenty of strong opinions about the potential vulnerabilities of popular homesecurity systemsB.The most
12、likely type of burglary(人室盗窃)by far is the unsophisticated crime of opportunity,usuallyinvolving a broken window or some forced entryAccording to the FB1crimes like these accounted forroughly twothirds of all household burglaries in the US in 2013The wide majority of the rest were illegalunforced en
13、tries that resulted from something like a window being left openThe odds of a criminal usingtechnical means to bypass a security system are so small that the FBI doesnt even track those statisticsC.One of the main theoretical homesecurity concerns is whether or not a given system is vulnerable to be
14、ingblocked from working altogetherWith wired setups,the fear is that a burglar(人室盗贼)might be ableto shut your system down simply by cutting the right cableWith a wireless setupyou stick batterypowered sensors up around your home that keep an eye on windows。doors,motion,and moreIf theydetect somethin
15、g wrong while the system is armedtheyll transmit a wireless aleft signal to a base station that will then raise the alarmThat approach will eliminate most cordcutting concerns-but what abouttheir wireless equivalent,jamming?with the fight device tuned to the fight frequency,whats to stop athief from
16、 jamming your setup and blocking that alert signal from ever reaching the base station?D.Jamming concerns are nothing new,and theyre not unique to security systemsAny device thats built toreceive a wireless signal at a specific frequency can be overwhelmed by a stronger signal coming in on thesame f
17、requencyFor comparison1ets say you wanted to“jam”a conversation between two people-allyoud need to do is yell in the listeners earE) Security devices are required to list the frequencies they broadcast onmat means that a potential thief canfind what they need to know with minimal GooglingThey willho
18、weverneed to know what systemtheyre looking forIf you have a sign in your yard declaring what setup you use,thatd point them in theright direction,though at that point,were talking about a highly targeted,semisophisticated attack,andnot the sort of forcedentry attack that makes up the majority of bu
19、rglariesIts easier to find and acquirejamming equipment for some frequencies than it is for othersF)Wireless security providers will often take steps to help combat the threat of jamming attacksSimpliSafe,winner of our EditorsChoice distinctionutilizes a special system thats capable of separating in
20、cidental RFinterference from targeted jamming attacksWhen the system thinks its being jammed,itll notify you viapush alert(推送警报)From there,its up to you to sound the alarm manuallyG)SimpliSafe was singled out in one recent article on jamming,complete with a video showing the entiresystem being effec
21、tively bypassed with handheld jamming equipmentAfter taking appropriate measures tocontain the RF interference to our test lab,we tested the attack out for ourselves,and were able to verify that its possible with the right equipmentHoweverwe also verified that SimpliSafes anti-jammingsystem worksIt
22、caught us in the act,sent an alert to my smartphone,and also listed our RF interferenceon the systems event logThe team behind the article and video in question make no mention of thesystem,or whether or not it detected themH)We like the unique nature of that softwareIt means that a thief likely wou
23、ldnt be able to Google how thesystem worksthen figure out a way around itEven if they could,SimpliSafe claims that its system isalways evolving,and that it varies slightly from system to system,which means there wouldnt be auniversal magic formula for cracking itOther systems also seem confident on
24、the subject of jammingTheteam at Frontpoint addresses the issue in a blog on its site,citing their own jam protection software andclaiming that there arent any documented cases of a successful jam attack since the company began offeringwireless security sensors in the l980sI)Jamming attacks are abso
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