大学英语六级真题,长篇阅读

【A】Water is a key ingredient in a healthy diet and lifestyle. There are many health benefits of drinking water. It helps flush impurities and toxins out of our systems. It aids in the delivery of oxygen and nutrients. In fact, nearly every system in our bodies relies on water for proper functioning. But what if your water is unhealthy?

【B】In past decades, concerns about tap water and its impact on overall health led some people to turn to bottled drinking water instead. In those days, there were few choices. You could pay to have a company deliver large bulky plastic bottles of water for the water cooler. Or you could purchase gallon jugs of distilled or "drinking water" at the grocery store.

【C】In recent years, there has been an explosion in the number of different bottled waters available, with big distributors such as Coke and Pepsi jumping on the bandwagon. But are bottled drinking waters like Coke's Dasani brand, Pepsi's Aquafina, or Wal-Mart's store brand really any healthier than your tap water? Or would you be better off with a drinking water filtration system?

As we've learned more about the water we drink, the technology behind drinking water filters and purification systems has improved dramatically. There are filters to remove impurities, chemicals, heavy metals, bacteria and most every contaminant you can think of. With the right size and filter combination for your specific home, your water can be exceptionally pure and healthy.

Cost Comparison

Drinking water filtration systems have also become more affordable and easy to use. Although the initial cost of a whole house system usually runs several hundred dollars, that cost is often less than $100 each year if spread out over the life of the system.

There may be additional expenses to replace carbon filters, membranes in reverse osmosis drinking water filtration system, or lamps in an ultraviolet light water treatment device. These expenses can add another $100 or so to the annual costs of operating drinking water filters and purification systems.

While some people may hesitate to spend two or three hundred dollars each year for clean, safe drinking water, they are probably paying more for bottled drinking water. Calculations show that at a price of $1 to $4 per gallon, bottled or delivered water costs an average of $400 each year, especially if you purchase individual bottles. And that doesn't take into consideration the gas needed to drive to the store or the environmental impact of all the empty plastic bottles. Health Aspects

Many people who choose bottled drinking water understand that it is more expensive, but are willing to pay the extra money because they feel bottled water is safer and healthier than filtered drinking water. After all, bottled water is often marketed as "natural spring water" or "pure glacier water."

In reality, few bottled waters come from natural springs, and most of them use municipal tap water. The companies are able to get away with this false marketing because the regulations and standards for bottle drinking water are less stringent than those for residential drinking sources. Bottled water quality is regulated by the Food and Drug Administration (FDA), while drinking water systems are typically regulated by State regulations or the Environmental Protection Agency (EPA). This doesn't mean that the FDA isn't doing their job. It's just that the rules for bottled water only require it to be as good as tap water, not better.

In addition, the FDA regulations only apply to bottled drinking water that is transported across

state lines. If a company sells their bottled drinking water in the same state where it was bottled, the federal regulations don't apply. The result is that many bottled waters are not any healthier than filtered water, and in fact some are less pure.

This was demonstrated in a study conducted in 1999 by the Natural Resources Defense Council. They tested over 100 brands of bottled drinking water and found that about 1/3 of the waters contained contamination in the form of chemicals, bacteria, and arsenic. The study also found that up to 40% of bottled drinking waters come from a city water system.

How To Tell If Your Water Is Healthy

So how do you tell if the water you're drinking is healthy? With tap water, it's relatively easy. If you water comes from a municipal source, the suppliers are required by law to provide annual water quality reports. If you have a well, you can have an authorized lab test your water. It may cost $100 or more, but it's a small price to pay for peace of mind. Or you can purchase a kit and test it yourself, although the results are not as conclusive or reliable.

When it comes to bottled drinking water, it can be more difficult to know what you're getting. Start by checking the label or the bottle cap. Some may tell you that the water comes from a municipal source or "community water system," which means tap water.

If the label doesn't give any information, you can call the bottler and ask. But don't be surprised if you get the run around and are transferred to several different departments. Some states have a bottled water program that tracks bottled drinking water and can tell you the origin of the source water as well as other information.

Safe and healthy drinking water has become big business. Thousands of companies are vying for your hard earned cash, and some are not always honest about what their products offer. The initial investment for a home drinking water filtration system can seem expensive at first, but over time, it is usually less expensive than bottled drinking water. And with a water filter, you at least know where the water you drink came from and how it was treated.

Before going out and spending your hard earned money for bottled drinking water that may be no better than your own tap water, it's a good idea to do some research. You're likely to decide that a drinking water filtration system and/or purifier is the healthier choice and provides the best value as well.

大学英语六级阅读历年真题训练unit10(A)

最牛英语口语培训模式：躺在家里练口语，全程外教一对一，三个月畅谈无阻！ 洛基英语，免费体验全部在线一对一课程：https://www.sodocs.net/doc/3016253415.html,/ielts/xd.html（报名网址） Unit 10 Part ⅡReading Comprehension (35 minutes) Directions: There are 4 passages in this part. 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 the Answer Sheet with a single line through the centre Questions 21 to 25 are based on the following passage: More and more, the operations of our businesses, governments, and financial institutions are controlled by information that exists only inside computer memories. Anyone clever enough to modify this information for his own purposes can reap substantial rewards. Even worse, a number of people who have done this and been caught at it have managed to get away without punishment. It's easy for computer crimes to go undetected if no one checks up on what the computer is doing. But even if the crime is detected, the criminal may walk away not only unpunished but with a glowing recommendation from his former employers. Of course, we have no statistics on crimes that go undetected. But it's disturbing to note how many of the crimes we do know about were detected by accident, not by systematic inspections or other security procedures. The computer criminals who have been caught may be the victims of uncommonly bad luck. For example, a certain keypunch (键盘打孔) operator complained of having to stay overtime to punch extra cards. Investigation revealed that the extra cards she was being asked to punch were for dishonest transactions. In another case, dissatisfied employees of the thief tipped off (向……透露) the company that was being robbed. Unlike other lawbreakers, who must leave the country, commit suicide, or go to jail, computer criminals sometimes escape punishment, demanding not only that they not be charged but that they be given good recommendations and perhaps other benefits. All too often, their demands have been met. Why? Because company executives are afraid of the bad publicity that would result if the public found out that their computer had been misused. They hesitate at the thought of a criminal boasting in open court of how he juggled (耍弄) the most confidential records right under the noses of the company's executives, accountants,

2007年12月英语六级阅读真题及答案

2007年12月大学英语六级考试真题 Passage One Questions 52 to 56 are based on the following passage. Like most people, I’ve long understood that I will be judged by my occupation, that my profession is a gauge people use to see how smart or talented I am. Recently, however, I was disappointed to see that it also decides how I’m treated as a person. Last year I left a professional position as a small-town reporter and took a job waiting tables. As someone paid to serve food to people. I had customers say and do things to me I suspect they’d never say or do to their most casual acquaintances. One night a man talking on his cell phone waved me away, then beckoned (示意) me back with his finger minute later, complaining he was ready to order and asking where I’d been. I had waited tables during summers in college and was treated like a peon (勤杂工) plenty of people. But at 19 years old, I believed I deserved inferior treatment from professional adults. Besides, people responded to me differently after I told them I was in college. Customers would joke that one day I’d be sitting at their table, waiting to be served. Once I graduated I took a job at a community newspaper. From my first day, I heard a respectful tone from everyone who called me. I assumed this was the way the professional world worked — cordially. I soon found out differently. I sat several feet away from an advertising sales representative with a similar name. Our calls would often get mixed up and someone asking for Kristen would be transferred to Christie. The mistake was immediately evident. Perhaps it was because money was involved, but people used a tone with Kristen that they never used with me. My job title made people treat me with courtesy. So it was a shock to return to the restaurant industry. It’s no secret that there’s a lot to put up with when waiting tables, and fortunately, much of it can be easily forgotten when you pocket the tips. The service industry, by definition, exists to cater to others’ needs. Still, it seemed that many of my customers didn’t g et the difference between server and servant. I’m now applying to graduated school, which means someday I’ll return to a profession where people need to be nice to me in order to get what they want, I think I’ll take them to dinner first, and see how they treat someone whose only job is to serve them. 52. The author was disappointed to find that _______. [A] one’s position is used as a gauge to measure one’s intelligence [B] talented people like her should fail to get a respectable job [C] one’s occupation affects the way one is treated as a person [D] professionals tend to look down upon manual workers 53. What does the author intend to say by the example in the second paragraph? [A] Some customers simply show no respect to those who serve them. [B] People absorbed in a phone conversation tend to be absent-minded. [C] Waitresses are often treated by customers as casual acquaintances. [D] Some customers like to make loud complaints for no reason at all. 54. How did the author feel when waiting tables at the age of 19? [A] She felt it unfair to be treated as a mere servant by professional. [B] She felt badly hurt when her customers regarded her as a peon. [C] She was embarrassed each time her customers joked with her. [D] She found it natural for professionals to treat her as inferior. 55. What does the author imply by saying “…many of my customers didn’t get the difference between server and servant”(Lines 3-4, Para.7)? [A] Those who cater to others’ needs are destined to be looked down upon.

2017年6月英语六级阅读真题及答案 第1套 选词填空

2017年6月英语六级阅读真题及答案第1套选词填空 After becoming president of Purdue University in2013, Mitch Daniels asked the faculty to prove that their students have actually achieved one of higher education’s most important goals: critical thinking skills. Two years before, a nationwide study of college graduates had shown that more than a third had made no 26 gains in such mental abilities during their school years. Mr. Daniels needed to__27__ the high cost of attending Purdue to its students and their families. After all, the percentage of Americans who say a college degree is "very important" has fallen 28 in the last 5-6 years. Purdue now has a pilot test to assess students' critical thinking skills. Yet like many college " such as a graduate's ability to investigate and reason. However, the professors need not worry so much. The results of a recent experiment showed that professors can use __31__ metrics to measure how well students do in three key areas: critical thinking, written communication, and quantitative literacy. Despite the success of the experiment, the actual results are worrisome, and mostly __32__ earlier studies. The organizers of the experiment concluded that far fewer students were achieving high levels on critical thinking than they were doing for written communication or quantitative literacy. And that conclusion is based only on students nearing graduation. American universities, despite their global 33__ for excellence in teaching, have only begun to demonstrate what they can produce in real-world learning. Knowledge-based degrees are still important, but employers are still important, but employers are __34__ advanced thinking skills from college graduates. If the intellectual worth of a college degree can be __35__ measured, more people will seek higher education—and come out better thinkers. A. accurately B. confirm C. demanding D. doubtful E. drastically F. justify G. monopolized H. outcome I. predominance J. presuming K. reputation L. significant M. signify N. simultaneously O. standardized 答案：(26)L. significant (27)F. justify (28)E. drastically (29)D. doubtful (30)H. outcome (31)O. standardized (32)B. confirm (33)K. reputation (34)C. demanding (35)A. accurately 2017年6月英语六级阅读真题及答案第1套仔细阅读2篇 Open data sharers are still in the minority in many fields. Although many researchers broadly agree that public access to raw data would accelerate science, most are reluctant to post the results of their own labors online. Some communities have agreed to share online—geneticists, for example, post DNA sequence sat the GenBank repository (库) , and astronomers are accustomed to accessing images of galaxies and stars from, say, the Sloan Digital Sky Survey, a telescope that has observed some500 million objects—but these remain the excepti on, not the rule. Historically, scientists have objected to sharing for many reasons: it is a lot of work; until recently, good databases did not

2015大学英语六级阅读模拟试题及答案

大学英语六级阅读模拟试题及答案 第一篇 A scientific panel convened by the World Health Organization recommended guidelines on Friday for doctors conducting clinical studies of SARS patients. The panel urged doctors to apply the guidelines in analyzing the masses of potentially useful information about various therapies that were collected in this year’s epidemic. Much of that information has not been published or analyzed. “It is a matter of urgency to get better analysis and review,” said Dr. Simon Mardel, a WHO official who led the two-day meeting that ended on Friday. He said thousands of potential therapies and compounds had been tested so far as researchers try to determine treatments for SARS, or severe acute respiratory syndrome. “We recognize that having no treatment for SARS is hindering our ability to control an epidemic in so many ways.” He said. In the epidemic earlier this year, various treatments, like drugs to fight the virus or strengthen the immune system, as well as traditional Chinese medicine, were delivered under emergency conditions, in widely different settings and countries to patients suffering from varying stages of the illness. Those conditions—generally without standardized measurements or controlled situations—have made it hard to interpret results. Standard supportive therapy like nursing, and in severe cases the use of mechanical respirators（呼吸器）to help patients breathe, is the mainstay（主要支持）of SARS care, and helped many patients survive. But doctors still do not know how best to treat SARS patients who have breathing difficulties. Dr. Mardel said. One method is invasive ventilation. A second method involves blowing oxygen into the lungs through a mask. Both carry the risk of transmitting the virus to hospital employees. Without proper analysis, the panel was unable to say definitively which treatment worked best, or which caused the most harm. “There is a lack of shared information,” Dr. Mardel said, noting that a lot of data have not been published. The panel also agreed on guidelines that would allow doctors to conduct quick and safe clinical trials, a process that generally takes years to complete. The world Health Organization, a United Nations agency did not release the guidelines. Dr. Mardel said they were flexible because no one knew where, when and in what setting SARS would return. Experts in many countries have already listed the treatments they want to test, and the health agency is leaving these decisions to individual nations. 1. Guidelines recommended by the scientific panel can be used for _____. A. gathering potentially useful information about various therapies collected B. conducting clinical studies of SARS patients C. determining treatment for SARS D. publishing all the information about SARS

2014年12月大学英语六级长篇阅读匹配1

2014年12月大学英语六级长篇阅读匹配1 It's Time to Pay Attention to Sleep A. After being diagnosed with brain and lung cancer in 2011, Lynn Mitchell, 68, was averaging about an hour of solid sleep a night. Stressed about her treatments, she was paying for it in hours of lost sleep. B. The brain cancer was already affecting her mobility--Mitchell was often dizzy and would lose her balance--but the lack of sleep made things worse. Even walking became increasingly difficult. Exhausted in the mornings, she was practically incoherent (精神恍惚). When her doctors recommend she see a sleep therapist, Mitchell was relieved at how benign it sounded in comparison to the chemotherapy (化学疗法)she had undergone and the gene therapy trial she was undergoing, which had side effects like nausea and fatigue. C. For about nine weeks, Mitchell worked with the sleep therapist to adjust her sleep habits. She went to bed only when she was extremely fired. She quit watching TV in bed. She stopped drinking caffeinated (含咖啡因的) coffee in the evening. She also learned breathing exercises to relax and help her fall asleep. It was all quite simple and common sense, and most importantly, noninvasive and didn't require taking any pills. D. "It's common knowledge that sleep is needed for day to day function," says Dr. David Rapoport, director of the Sleep Medicine Program at NYU School of Medicine. "What isn't common knowledge is that it really matters--it's not just cosmetic." Rapoport has long seen people seek sleep therapy because they're chronically fired or suffering from insomnia, but an increasing number of patients are being referred to his center for common diseases, disorders, and mental health. E. Researchers have known for some time that sleep is critical for weight maintenance and hormone balance. And too little sleep is linked to everything from diabetes (糖尿病) to heart disease to depression. Recently, mounting evidence indicates that sleep plays a role in nearly every aspect of health. Beyond chronic illnesses, a child's behavioral problems at school could be rooted in mild sleep apnea (呼吸暂停). And studies have shown children with ADHD (注意力缺陷多动症) are more likely to get insufficient sleep. A recent study published in the journal SLEEP found a link between older men with poor sleep quality and cognitive decline. Another study shows sleep is essential in early childhood for development, learning, and the formation and retention of memories. F. But to many of us, sleep is easily sacrificed, especially since lack of it isn't seen as life threatening.Over time, sleep deprivation can have serious consequences, but we mostly sacrifice a night of sleep here and there, and always say that we'll "catch up." Luckily, it is possible to make up for sleep debt (though it can take a very long time), but most Americans are still chronically sleep deprived.

2011年6月大学英语六级阅读考试真题及答案_完美打印版

2011年6月大学英语六级真题及答案 Part IV Reading Comprehension (Reading in Depth) (25 minutes) Section A Directions: In this section, there is a short passage with 5 questions or incomplete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words. Please write your answers on Answer Sheet 2. Questions 47 to 51 are based on the following passage. How good are you at saying "no"? For many, it's surprisingly difficult. This is especially true of editors, who by nature tend to be eager and engaged participants in everything they do. Consider these scenarios: It's late in the day. That front-page package you've been working on is nearly complete; one last edit and it's finished. Enter the executive editor, who makes a suggestion requiring a more-than-modest rearrangement of the design and the addition of an information box. You want to scream: "No! It's done!" What do you do? The first rule of saying no to the boss is don't say no. She probably has something in mind when she makes suggestions, and it's up to you to find out what. The second rule is don't raise the stakes by challenging her authority. That issue is already decided. The third rule is to be ready to cite options and consequences. The boss's suggestions might be appropriate, but there are always consequences. She might not know about the pages backing up that need attention, or about the designer who had to go home sick. Tell her she can have what she wants, but explain the consequences. Understand what she's trying to accomplish and propose a Plan B that will make it happen without destroying what you've done so far. Here's another case. Your least-favorite reporter suggests a dumb story idea. This one should be easy, but it's not. If you say no, even politely, you risk inhibiting further ideas, not just from that reporter, but from others who heard that you turned down the idea. This scenario is common in newsrooms that lack a systematic way to filter story suggestions. Two steps are necessary. First, you need a system for how stories are proposed and reviewed. Reporters can tolerate rejection of their ideas if they believe they were given a fair hearing. Your gut reaction (本能反应) and dismissive rejection, even of a worthless idea, might not qualify as systematic or fair. Second, the people you work with need to negotiate a "What if ...?" agreement covering "What if my idea is turned down?" How are people expected to react? Is there an appeal process? Can they refine the idea and resubmit it? By anticipating "What if...?" situations before they happen, you can reach understanding that will help ease you out of confrontations. 47. Instead of directly saying no to your boss, you should find out __________. 48. The author's second warning is that we should avoid running a greater risk by __________. 49. One way of responding to your boss's suggestion is to explain the __________ to her and offer an alternative solution. 50. To ensure fairness to reporters, it is important to set up a system for stories to __________. 51. People who learn to anticipate "What if...?" situations will be able to reach understanding and avoid __________. Section B Directions: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 Answer Sheet 2 with a single line through the centre. Passage One Questions 52 to 56 are based on the following passage. At the heart of the debate over illegal immigration lies one key question: are immigrants good or bad for the economy? The American public overwhelmingly thinks they're bad. Yet the consensus among most economists is