Have you ever walked outside thinking it was one temperature but quickly discovered it felt colder? That is because of the "wind chill" effect. Wind chill is how cold people and animals feel when they are outside, not the actual temperature on the thermometer . It is based on how quickly your body loses heat when it is exposed to wind and cold. When the wind is strong, your body quickly loses heat, making the temperature of your skin drop. When scientists first started calculating wind chill, they used research conducted in 1945 by explorers to Antarctica who measured how quickly water froze outside. But water freezes faster than exposed skin, so the wind chill index based on that data wasn't accurate. In 2001, the US government began to measure wind chill more precisely by testing how quickly people's skin froze. Twelve volunteers were placed in a chilled wind tunnel. Equipment was stuck to their faces to measure the heat flow from their cheeks, forehead, nose and chin while they walked three miles per hour on a treadmill . The experiment revealed how quickly exposed skin can be damaged, particularly unprotected areas like your fingers, toes, the tip of your nose and your ear lobes. In fact, 40 percent of your body heat can be lost through your head! Signs you might have frostbite are when the skin turns white or pale and you lose feeling in that area. The information collected from the volunteers helped scientists work out the math to compute wind chill. It involves wind speed and air temperature. If, for example, the temperature outside is zero degrees Fahrenheit and the wind is blowing at 15 miles per hour, the wind chill is calculated at 19 degrees below zero. At that wind chill temperature, exposed skin can freeze in 30 minutes. You can find a calculation table at www.nws.noaa.gov/om/windchill/index.shtml. Experts advise in cold weather that you wear loose-fitting, lightweight, warm clothing, worn on top of each other. Air caught between the clothes will keep you warm. The best cold-weather coats have... What factors influence wind chill? A) A person's body temperature and will speed. B) Wind speed and a person's strength. C) Air temperature and wind speed. D) The location and air temperature.
C
(Question)
A sense of humor is just one of the many things shared by Alfred and Anthony Melillo, 64-year-old twin brothers from East Haven who made history in February 2002. On Christmas Eve, 1992, Anthony had a heart transplant from a 21-year-old donor. Two days before Valentine's Day in 2002, Alfred received a 19-year-old heart, marking the first time on record that twin adults each received heart transplants. "I'm 15 minutes older than him, but now I'm younger because of my heart and I'm not going to respect him," Alfred said with a big smile, pointing to his brother while talking to a roomful of reporters, who laughed frequently at their jokes. While the twins knew that genetics might have played a role in their condition, they recognized that their eating habits might have also contributed to their heart problems. "We'd put half a pound of butter on a steak. I overdid it on all the food that tasted good, so I guess I deserved what I got for not dieting properly." The discussion moved to Anthony's recovery. In the five years since his heart transplant, he had been on an exercise program where he regularly rode a bicycle for five miles, swam each day, and walked a couple of miles. He was still on medication, but not nearly as much as Alfred, who was just in the early stage of his recovery. "Right now I feel pretty young and I'm doing very well," Anthony said. "I feel like a new person." Alfred said his goal, of course, was to feel even better than his brother. But, he added, "I love my brother very much. We're very close and I'm sure we'll do just fine." This article is mainly about _ . A) the danger of heart transplanting B) becoming young by getting a new heart C) the effect of genetics on the heart D) the twin brothers who received heart transplants
(Answer)
D
Ques: Once there was a man who had two children, a boy and a girl. The boy was good-looking but the girl was not. One day they found a mirror for the first time and they saw what they looked like. The boy was very pleased and he said to his sister, "How handsome I am! I look much nicer than you!" The girl did not like what her brother said and gave him a hard push. "Go away!" she said. Their father saw what was happening. He went up to them and said to the boy, "You must always BE good as well as LOOK good." Then to the girl he said, "My dear, if you help everyone and do your best to please him, everyone will love you. It does not matter that you are not as good-looking as your brother." The girl gave the boy a hard push because _ . A) she was stronger B) what he said was wrong C) she was not pleased with what he said D) her father loved her
Ans: C
Question: A new study finds that our brains are wired to make music-color connections depending on how the music makes us feel. Mozart's "Flute Concerto No.1 in G Major" is most often associated with bright yellow and orange, whereas his "Requiem in D Minor" is linked to bluish gray, the findings revealed. US researchers from the University of California, Berkeley, enlisted nearly 100 subjects for a study on music and color. With 37 colors, the UC Berkeley study found that people tend to pair faster-paced music in a major key with lighter, more vivid, yellow colors, whereas slower-paced music in a minor key is more likely to be teamed up with darker, grayer, bluer colors. "Surprisingly, we can predict with 95 percent accuracy how happy or sad the colors people pick will be based on how happy or sad the music is that they are listening to," said lead author and UC Berkeley vision scientist Stephen Palmer. In three experiments, the subjects listened to 18 classical music pieces that varied in pace (slow, medium, fast) and in major VS minor keys. In the first experiment, participants were asked to pick five of the 37 colors that best matched the music to which they were listening. Separately, they rated each piece of music on a scale of happy to sad, strong to weak, lively to dull, and calm to angry. Next, the research team plans to study particiapants in Turkey where traditional music employs a wider range of scales than just major and minor. "We know that in Mexico and the US the responses are very similar," Palmer said. "But we don't yet know about China or Turkey." According to the text, the research mainly deals with _ A) how colors or music influence our emotions B) how emotions affect music-color connections C) why we have different feelings towards music D) why we have different feelings towards colors
Answer:
B