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1、2016年12月大学英语四级考试真题(第3套)Part Writing (30 minutes)Directions: For this part, you are allowed 30 minutes to write an essay. Suppose you have two options upon graduation: one is to work in a state-owned business and the other in a joint venture. You are to make a choice between the two. Write an essay t
2、o explain the reasons for your choice. You should write at least 120 words but no more than 180 words.Part Listening 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 section, there is a pa
3、ssage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each
4、 item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank 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 just about
5、 every difference between the sexes. A new study 26 that belief, questioning whether brains really can be distinguished by gender.In the study, Tel Aviv University researchers 27 for sex differences throughout the entire human brain.And what did they find? Not much. Rather than offer evidence for 28
6、 brains as male or female, research shows that brains fall into a wide range, with most people falling right in the middle.Daphna Joel, who led the study, said her research found that while there are some gender-based 29 , many different types of brain cant always be distinguished by gender.While th
7、e average male and average female brains were 30 different, you couldnt tell it by looking at individual brain scans. Only a small 31 of people had ail-male or all-female characteristics.Larry Cahill, an American neuroscientist (神经科学家), said the study is an important addition to a growing body of re
8、search questioning 32 beliefs about gender and brain function. But he cautioned against concluding from this study that all brains are the same, 33 of gender.Theres a mountain of evidence 34 the importance of sex influences at all levels of brain function, he told The Seattle Times.If anything, he s
9、aid, the study 35 that gender plays a very important role in the brain- even when we are not clear exactly how. A) abnormal F) figure K) similaritiesB) applied G) percentage L) slightlyC) briefly H) proving M) suggestsD) categorizing I) regardless N) tastes E) challenges J) searched O) traditional S
10、ection BDirections: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is mark
11、ed with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2.Can Burglars Jam Your Wireless Security System?A) Any product that promises to protect your home deserves careful examination. So it isnt surprising that youll find plenty of strong opinions about the potent
12、ial vulnerabilities of popular home-security systems.B) The most likely type of burglary (入室盗窃) by far is the unsophisticated crime of opportunity, usually involving a broken window or some forced entry. According to the FBI, crimes like these accounted for roughly two-thirds of all household burgla
13、ries in the US in 2013. The wide majority of the rest were illegal, unforced entries that resulted from something like a window being left open. The odds of a criminal using technical means to bypass a security system are so small that the FBI doesnt even track those statistics.C) One of the main th
14、eoretical home-security concerns is whether or not a given system is vulnerable to being blocked from working altogether. With wired setups, the fear is that a burglar (入室盗贼) might be able to shut your system down simply by cutting the right cable. With a wireless setup, you stick battery-powered se
15、nsors up around your home that keep an eye on windows, doors, motion, and more. If they detect something wrong while the system is armed, theyll transmit a wireless alert signal to a base station that will then raise the alarm. That approach will eliminate most cord-cutting concerns-but what about t
16、heir wireless equivalent, jamming? With the right device tuned to the right frequency, whats to stop a thief from 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 systems. Any device thats bui
17、lt to receive a wireless signal at a specific frequency can be overwhelmed by a stronger signal coming in on the same frequency. For comparison, lets say you wanted to jam a conversation between two people-all youd need to do is yell in the listeners ear.E) Security devices are required to list the
18、frequencies they broadcast on-that means that a potential thief can find what they need to know with minimal Googling. They will, however, need to know what system theyre looking for. If you have a sign in your yard declaring what setup you use, thatd point them in the right direction, though at tha
19、t point, were talking about a highly targeted, semi-sophisticated attack, and not the sort of forced-entry attack that makes up the majority of burglaries. Its easier to find and acquire jamming equipment for some frequencies than it is for others.F) Wireless security providers will often take steps
20、 to help combat the threat of jamming attacks. SimpliSafe, winner of our Editors Choice distinction, utilizes a special system thats capable of separating incidental RF interference from targeted jamming attacks. When the system thinks its being jammed, itll notify you via push alert (推送警报). From th
21、ere, its up to you to sound the alarm manually.G) SimpliSafe was singled out in one recent article on jamming, complete with a video showing the entire system being effectively bypassed with handheld jamming equipment. After taking appropriate measures to contain the RF interference to our test lab,
22、 we tested the attack out for ourselves, and were able to verify that its possible with the right equipment. However, we also verified that SimpliSafes anti-jamming system works. It caught us in the act, sent an alert to my smartphone, and also listed our RF interference on the systems event log. Th
23、e team behind the article and video in question make no mention of the system, or whether or not it detected them.H) We like the unique nature of that software. It means that a thief likely wouldnt be able to Google how the system works, then figure out a way around it. Even if they could, SimpliSaf
24、e claims that its system is always evolving, and that it varies slightly from system to system, which means there wouldnt be a universal magic formula for cracking it. Other systems also seem confident on the subject of jamming. The team at Frontpoint addresses the issue in a blog on its site, citin
25、g their own jam protection software and claiming that there arent any documented cases of a successful jam attack since the company began offering wireless security sensors in the 1980s.I) Jamming attacks are absolutely possible. As said before, with the right equipment and the right know-how, its p
26、ossible to jam any wireless transmission. But how probable is it that someone will successfully jam their way into your home and steal your stuff?J) Lets imagine that you live in a small home with a wireless security setup that offers a functional anti-jamming system. First, a thief is going to need
27、 to target your home, specifically. Then, hes going to need to know the technical details of your system and acquire the specific equipment necessary for jamming your specific setup. Presumably, you keep your doors locked at night and while youre away, so the thief will still need to break in. That
28、means defeating the lock somehow, or breaking a window. Hell need to be jamming you at this point, as a broken window or opened door would normally release the alarm. So, too, would the motion detectors in your home, so the thief will need to continue jamming once hes inside and searching for things
29、 to steal. However, hell need to do so without tripping the anti-jamming system, the details of which he almost certainly does not have access to.K) At the end of the day, these kinds of systems are primarily designed to protect against the sort of opportunistic smash-and-grab attack that makes up t
30、he majority of burglaries. Theyre also only a single layer in what should ideally be a many-sided approach to securing your home, one that includes common sense things like sound locks and proper exterior lighting at night. No system is impenetrable, and none can promise to eliminate the worst case
31、completely. Every one of them has vulnerabilities that a knowledgeable thief could theoretically exploit. A good system is one that keeps that worst-case setting as improbable as possible while also offering strong protection in the event of a less-extraordinary attack.36. It is possible for burglar
32、s to make jamming attacks with the necessary equipment and skill.37. Interfering with a wireless security system is similar to interfering with a conversation.38. A burglar has to continuously jam the wireless security device to avoid triggering the alarm, both inside and outside the house.39. Simpl
33、iSafe provides devices that are able to distinguish incidental radio interference from targeted jamming attacks.40. Only a very small proportion of burglaries are committed by technical means.41. It is difficult to crack SimpliSafe as its system keeps changing.42. Wireless devices will transmit sign
34、als so as to activate the alarm once something wrong is detected.43. Different measures should be taken to protect ones home from burglary in addition to the wireless security system.44. SimpliSafes device can send a warning to the house owners cellphone.45. Burglars can easily get a security device
35、s frequency by Internet search.Section CDirections: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on A
36、nswer Sheet 2 with a single line through the centre.Passage OneQuestions 46 to 50 are based on the following passage.As a person who writes about food and drink for a living, I couldnt tell you the first thing about Bill Perry or whether the beers he sells are that great. But I can tell you that I l
37、ike this guy. Thats because he plans to ban tipping in favor of paying his servers an actual living wage.I hate tipping.I hate it because its an obligation disguised as an option. I hate it for the post-dinner math it requires of me. But mostly, I hate tipping because I believe I would be in a bette
38、r place if pay decisions regarding employees were simply left up to their employers, as is the custom in virtually every other industry.Most of you probably think that you hate tipping, too. Research suggests otherwise. You actually love tipping! You like to feel that you have a voice in how much mo
39、ney your server makes. No matter how the math works out, you persistently view restaurants with voluntary tipping systems as being a better value, which makes it extremely difficult for restaurants and bars to do away with the tipping system.One argument that you tend to hear a lot from the pro-tipp
40、ing crowd seems logical enough: the service is better when waiters depend on tips, presumably because they see a benefit to successfully veiling their contempt for you. Well, if this were true, we would all be slipping a few 100-dollar bills to our doctors on the way out their doors, too. But as it
41、turns out, waiters see only a tiny bump in tips when they do an exceptional job compared to a passable one. Waiters, keen observers of humanity that they are, are catching on to this; in one poll, a full 30% said they didnt believe the job they did had any impact on the tips they received.So come on
42、, folks: get on board with ditching the outdated tip system. Pay a little more upfront for your beer or burger. Support Bill Perrys pub, and any other bar or restaurant that doesnt ask you to do drunken math.46. What can we learn about Bill Perry from the passage?A) He rims a pub that serves excelle
43、nt beer.B) He intends to get rid of the tipping practice.C) He gives his staff a considerable sum for tips.D) He lives comfortably without getting any tips.47. What is the main reason why the author hates tipping?A) It sets a bad example for other industries.B) It adds to the burden of ordinary cust
44、omers.C) It forces the customer to compensate the waiter.D) It poses a great challenge for customers to do math.48. Why do many people love tipping according to the author?A) They help improve the quality of the restaurants they dine in.B) They believe waiters deserve such rewards for good service.C
45、) They want to preserve a wonderful tradition of the industry.D) They can have some say in how much their servers earn.49. What have some waiters come to realize according to a survey?A) Service quality has little effect on tip size.B) It is in human nature to try to save on tips.C) Tips make it mor
46、e difficult to please customers.D) Tips benefit the boss rather than the employees.50. What does the author argue for in the passage?A) Restaurants should calculate the tips for customers.B) Customers should pay more tips to help improve service.C) Waiters deserve better than just relying on tips fo
47、r a living.D) Waiters should be paid by employers instead of customers.Passage TwoQuestions 51 to 55 are based on the following passage.In the past, falling oil prices have given a boost to the world economy, but recent forecasts for global growth have been toned down, even as oil prices sink lower
48、and lower. Does that mean the link between lower off prices and growth has weakened?Some experts say there are still good reasons to believe cheap oil should heat up the world economy. Consumers have more money in their pockets when theyre paying less at the pump. They spend that money on other things, which stimulates the economy.The