When the recent research was analyzed , it was found that a lot of people wanted free pictures or free music from the Web. If it couldn't be free, then they wanted it "new" or at least at a low price. It seems that 70 percent of people aged 16 to 24 download music online but only 1 in 40 tracks are bought legally. Thus, some companies are planning to give all of their music away for free. The music will be totally free except that you will have to pay with your time by watching advertisements. This will be perfect for those who have lots of time but little money. The Web has encouraged a belief that things can be free, or at least very cheap. It seems that everyone is looking for a good deal on the Web. The desire for free objects is part of the nature of the Web because the Web is about self-service and self-service is all about being free, cheap, fast and convenient. It's interesting how words change their meaning. Stealing has now become file sharing, but it's not really stealing, is it? Free is a funny word. We all know that very little is really for free. If we go searching on the Web for free music, we know--or should know--that there are risks involved. However, it doesn't matter. We still want free things, or at least the sense that we're getting a real bargain and that at a minimum we're saving time. What can be the worst experience on the Web? A site that charges us high prices and wastes our time. What is the best title for the text? A) The Nature of the Web B) The Web and the Culture of " Free" C) Stealing and File Sharing D) What Does the Word " Free" Mean?
B
(Question)
Don't you find that it is getting increasingly darker every day when you wake up for school ? As winter comes ,days become shorter while the nights become longer ,In the past people slept more in winter ,but in modern times we just use more electric light instead of sunlight to continue our normal routines . But scientific research is finding that manhandling of electric light is making us sick . Electric light is fooling the body's biological clock into releasing awaking hormones ( )at the wrong times ,scientists say .This might be leading to seasonal fatigue and depression . Much more than mental health is at stake ,Recent scientific studies have found that women who work at night ,have higher chances of getting breast-cancer . "Electric lights are wonderful ,but as with a lot of other things ,we really mess ,things up "said David Avery ,a psychiatrist ." Our ancestors evolved in a very regular light -dark cycle ,and our bodies just work better that way ." Researchers have known for a long time that all living things have a biological clock that is linked to light ,Being of the natural day-night cycle can cause fatigue ,mood change and depression ,This is known as seasonal affective disorder ,or SAD. Scientists disagree on the cause of SAD ,Some say it is caused by winter's late sunrises , others blame the early sunsets . However ,they all agree the perfect solution to SAD is to give up artificial light ,It will quickly bring someone into a cycle of long ,restful nights and easy awakenings at dawn . But realistically most people need to use electric light in their everyday life . Ironically the next best solution is to use more bright lights to reset the body's biological clock . By getting bright light first thing in the morning it simulates an earlier dawn and shifts the body clock forward ,according to Alfred Lewy ,a psychiatrist at Oregon Health & Science University . A 2005 study done by the American Psychiatric Association showed that daily exposure to bright light was about as effective as... According to the text ,electric light is bad for health mainly because _ A) is shortens people's sleeping time B) it makes people upset and unable to concentrate C) it releases radiation and increases people's chances of getting sick D) it stimulates the body to release awaking hormones at the wrong time
(Answer)
D
Ques: Humans might be the most highly-evolved species on the planet, but most animals possess skills we can only dream of having. Imagine how much electricity we could save if we could see in the dark the way cats do. Imagine leaping from tree to tree like a monkey. Giraffes, which are otherwise calm and good-natured, sleep only 4.6 hours a day. We realized a long, long time ago that nature provides the best blueprint for invention. We've borrowed canals from beavers and reflectors from cat's eyes. Although the words "bionics" became popular only after the 1960s, history shows that nature has always provided ideas on solving everyday problems. Our archives don't go back to the time of Leonardo da Vinci and his bird-like flying machines, but we can take you to the late 19th century, where we applied those same principles for building our first practical airplanes. To prepare for their flight at Kitty Hawk, the Wright brothers studied the movements of pigeons to figure out how they stayed high up when they were heavier than air. Their success inspired scores of successors to improve on the airplane by studying various aspects of nature. One of Orville Wright's pupils caught and stuffed seagulls to examine their wingspan. Meanwhile, two French inventors examined spinning sycamore seeds in an effort to apply those same motions, reversed, to a helicopter . Some examples are more obvious than others. The outside of the airplane designed by the Wright brothers looks like a minimalistic structure. On the other hand, Barney Connett's fish submarine actually looks like a fish. Some bio-inspired concepts have yet to be invented. In the 1960s, the US Army commissioned several university professors to conduct research on the motor skills animals in hope of applying those same abilities to tanks. Tanks that run like horses or jump like grasshoppers -sounds shocking, doesn't it? But imagine how life would change if we could achieve that. Which of the following is true about the research carried out by the US Army? A) It has cost a large sum of money. B) It has changed our life. C) It has improved the abilities of tanks D) It has not succeeded yet.
Ans:
D