For many years, scientists have wondered how Chrysopelea paradisi, known as the "flying" snakes, can stay afloat as they leap from one tree to another, sometimes covering a distance of as long as 79 feet. Now a new study has explained that it may be all to do with the way they move. The report was published by Virginia Tech scientist, Jake Soeha who has been studying the flying snakes for a number of years. He began his research by first focusing on its launch technique. He discovered that the snakes first make themselves completely flat and then move side to side; they glide rapidly at a speed of between 26-33 feet per second, before leaping off. Once they take off, their bodies actually tilt at about a 25-degree angle to the airflow created by their flight. When they first leap, the snakes start to drop altitude to pick up speed. With the front of their bodies held stiff, they start a strange air-gliding dance, by moving from side to side. This turns their entire body into one big wing, allowing them to glide across long distances. The findings are not only exciting because they solve the puzzle of how the snakes are able to fly, but also because the same principles could be used to build small flying instruments. The flying snakes that are native to South and South East Asia spend most of their lives in trees in the lowland tropical forests. They grow between 2-3 feet long and are about as wide as a human finger. As would be expected, the smaller and lighter ones are more able to "glide" for longer distances than the bigger and heavier ones. They are not the only wingless animals that can fly -- there are flying frogs that use similar gliding techniques to make their way across forests. Which of the following is TRUE about the findings of the study? A) It made the scientists excited and puzzled. B) It popularised flying snakes. C) It can help with the building of small flying instruments. D) It taught the public more about snakes.
C
The Nobel Prizes in physiology or medicine, physics and chemistry are the most respected prizes in science. But talk to scientists in private, and many will complain why (besides jealousy, perhaps) are some scientists unhappy with the Nobels? One reason is that the committees can often be slow to recognize achievement. Alfred Nobel specified in his will that the prizes should reward work done in the previous year. But experience soon showed that this was risky, as medals were given out for discoveries that later proved questionable. So a degree of caution is probably advisable. Sometimes, though, it can lead to strange results. Subrahmanyan Chandrasekhar, for instance, had to wait until 1983 to win a prize for work he had done in the 1930s on the structure of stars. However, Albert Einstein never won a prize for his theory of relativity. Even though some pretty suggestive evidence had been produced by Arthur Eddington in 1919, relativity, which has later passed every experimental test ever thrown at it, was still considered somewhat risky and obscure. Another criticism concerns the tradition that no more than three people can share a prize. Science is rarely this clear-cut. Take this year's physics prize, which recognised Peter Higgs for predicting the existence of the mass-bestowing particle that now bears his name. Dr Higgs was only one of several people with a claim. Two other teams---- Rober Brout and Francois Englert, as well as Gerald Guralnik, Carl Hageh and Tom Kibble----- submitted papers on the same idea to the same journal that published Dr Higgs's work, all within a few months of each other. Science often works like this, with different people coming up with similar ideas at similar times. In the event, the committee decided to honour Dr Engler (Brout is dead, therefore unqualified), whose paper was earlier than Dr Higgs's but did not explicitly predict a particle, over Dr Guralnik and his collaborators, who were more comprehensive but published a few weeks later. The passage is most probably coming from_? A) a magazine B) a book review C) a literature work D) a science fiction
A
Q: An increase in the number of suicides in prefix = st1 /South Korea, has led policeman Yoo Byoung-jong to a new job. He patrols Seoul's bridges to stop desperate people from throwing themselves into the river. According to South Korea's health ministry, suicide rates have doubled in a decade and are now the leading cause of death for people in their 20s and 30s. The country has the fourth-highest suicide rate among the 30 industrialized countries in the Organization for Co-operation and Development (OECD). It recorded 22.8 suicide deaths for every 100,000 people in 2003. That's lower than Hungry, Finlandand close neighbourJapan. But the number is growing by about 1 percent each year, faster than for all other OECD nations. In a move to cut suicides by a fifth by 2010, the health ministry is running a television ad campaign. It opens with a lonely man walking on a bridge. A voice over says: "Think five minutes more before you give it all away. Don't forget you have a loving family." Other ministry plans include setting up more hotlines and training more suicide counselors. Authorities are also limiting websites that provide suicide methods and sometimes even sell toxic chemicals. Distressed individuals range from students worried about poor grades to people in debt as well as disgraced politicians. Experts say the rising toll in some way can be blamed on media coverage of recent high-profile suicides. These include top business leaders and celebrities who apparently lead a number of people to copy their actions. "We saved 50 lives this year when people turned to bridges as a place to die after news reports of such deaths by 'big shots'," said the 38-year-oldYoo, in December. Last July, the government and civil associations urged media to avoid reporting specific methods and locations of suicides. But it is difficult to clearly give reasons for the suicide increase. It doesn't say but implies that . A) present hotlines are not enough for suicide counsellors B) people choose suicide as the way to end their lives because they are short of love C) cutting suicides by a fifth by 2010 is easy to carry out D) authorities manage websites efficiently
A: A
*Question*
Most middle school students find it boring to learn math. But students in Yet Sen Middle School in New York, US, don't think so. Why? Because they are in the school of One Program, which asks students to work on their own or in small groups on computers to have math lessons. "The program gives the students a new learning style. No traditional classroom can compare with it. We give each lesson according to the students' interest and their strong and weak points, "said Joel. Klein, the school's headteacher, "We're looking for a new way that interests students. " Students enjoy these math lessons, especially lessons with video games. They must find out the answers to math problems to get through the game. One such game is Dimension M. As students move through mazes with their keyboards, some questions come up. Caleb Deng had to answer the question: What is 5+(6x3)? He _ on paper quickly because there was just a minute left to play. "I was right, "said Deng, 14, as he ended the game with a high score . "This really makes math lessons more exciting, since we are fighting to learn better. " This article is mainly about _ . A) how to learn math well B) an interesting math lesson C) a new way to learn math D) kids in Yet Sen Middle School
**Answer**
C