In colonies (群体) that range in size from a few hundred to tens of millions, they organize their lives with a clear division of labor. Even more amazing is how they achievethis level of organization. Where we use sound and sight to communicate, ants dependprimarily on pheromone (外激素), chemicals sent out by individuals and smelled or tastedby fellow members of their colony. When an ant finds food, it produces a pheromone that will lead others straight to where the food is. When an individual ant comes under attack or is dying, it sends out an alarm pheromone to warn the colony to prepare for a conflict as a defense unit.

         In fact, when it comes to the art of war, ants have no equal. They are completely fearless and will readily take on a creature much larger than themselves, attacking in large groups and overcoming their target. Such is their devotion to the common good of the colony that not only soldier ants but also worker ants will sacrifice their lives to help defeat an enemy.

         Behaving in this selfless and devoted manner, these little creatures have survived on Earth, for more than 140 million years, far longer than dinosaurs. Because they think as one, they have a collective (集体的) intelligence greater than you would expect from itsindividual parts.

    Did you know that the color of uniforms can influence the performance of an athlete? It may sound strange, but a study suggests this might be true.

    Two British scientists studied the results of four sports in the 2004 Athens Olympic Games where the athletes had been given either a red or a blue uniform. They discovered that when there was a big difference in the score, color had no influence on the result. But if it was a close match, the athlete in a red uniform was more likely to win. Then they looked at the uniforms of the soccer teams at the Euro 2004 tournament. Again, teams wearing red won more games.

    The two scientists got their idea from earlier studies of wild animals. It had been discovered that when a male show red on its body, it sends a signal of its power and strength. For example, in many kinds of monkey, the more the male shows off its red scare, the more females it can attract

    Based on this fact, the British scientists thought that the idea might work for humans, too. According to them, when an athlete sees a competitor in a red uniform, he gets a feeling that his competitor could be stronger than him. And that kind of feeling may have a bad influence on the player's performance in the actual game.

    Although the idea is Interesting, most people don't accept that color signals in the animals world can really be useful to humans in sports. They think that it is unreasonable to develop an Idea based on such a small number of examples. Much more research has to be done to prove the influence of uniform colors on the performance of athletes.

    It is a cold and dry winter morning. When you wake up, you feel that your throat hurts. You begin to sneeze and later you may cough. You must have a cold! Wait a moment. Could it just be a common cold or the flu that's been going around?

    A cold gives you a runny nose and cough. But it's usually easy to deal with. Some take medicine while others drink herbal tea or chicken soup. Usually you feel better after a week.

    On the other hand, the flu can be much more dangerous. It usually gives you fever.

    Sometimes it can cause death. According to an American magazine, the worst flu killed about 50 million people from 1918 to 1919.

    Don't worry. If you get a flu vaccine（疫苗）, it can stop you from getting the virus. Flu vaccines work by giving the body a small amount of flu viruses. This causes your body to develop antibodies. So next time you get the flu, the antibodies should help you.

    The flu virus changes every few years. Therefore, there are so many types of flu, such as H1N1 and H5N1. The antibodies for one type of flu can't help us against all types of flu. That's why we need to get vaccine every year.

    However, good health habits may also help stop you developing a cold or flu. Washing your hands often helps stop you from getting viruses. It is also important to get regular exercise and eat healthy food. All these can help you strengthen your immune system.

    Google is consistently rated the best place to work. So you need a degree from Harvard to in the door, right?

    Not really, according to Laszlo Bock, Google's Head of People Operations. When the company was small, Google cared a lot about getting kids from Harvard, Stanford, MIT and many other Ivy League schools.  But Bock said it was the "wrong" hiring strategy.  Experience has taught him there are exceptional kids at many other places, from state schools in California to New York.

    "What we find is the best people from places like that are just as good, if not better, as anybody you can get from any Ivy League school, "said Bock, who just authored a book titled "Work Rules!"

    Every year, 2 million people apply to get a job at Google.  Bock himself has seen some 25, 000 résumés.

    So what else does Google not care about:

    Grades: Google's data shows that grades predict performance for the first two years of a career, but do not matter after that.

    Brain-teasers: Gone are interview questions such as: Why are manhole covers（井盖)round? or How many golf balls can fit in a school bus? "Our research tells us those questions are a waste of time, "Bock said "They're a really coachable skill. The more you practice, you get better at it. "

    Here's what Google does care about:

    Problem solvers: Your cognitive ability(认知能力), or how well you solve problems.

    Leaders: The idea is not whether you were president of the student body or vice president of the bank, but rather:" When you see a problem do you step in, help solve it, "and then critically, "Are you willing to step out and let somebody else take over, and make room for somebody else? Are you willing to give up power?"

    Googleyness: That's what Google calls its cultural fit. It's not "Are you like us?" Bock said. "We actually look for people who are different, because diversity gives us great ideas."

    "What's most important is that people are intellectually humble, willing to admit when they're wrong, and care about the environment around them… because we want people who think like owners not employees, "Bock said.

    The least important thing? Knowing how to do the job.

    "We figure if you get the first three right you'll figure it out most of the time."

    A study showed that the experiences children have in their first few years are important. These experiences affect the development of the brain. When children receive more attention, they often have higher IQs. Babies receive information when they see, hear and feel things, which makes connections between different parts of the brain. There are a hundred trillion(万亿)connections in the brain of a three-year-old child.

    Researcher Judit Gervain tested how good newborns are at distinguishing different sound patterns. Her researchers produced images of the brains of babies as they heard different sound patterns. For example, one order was mu-ba-ba. This is the pattern"A-B-B". Another order was mu-ba-ge. This is the pattern “A-B-C”. The images showed that the part of the brain responsible for speech was more active during the" A-B-B" pattern. This shows that babies can tell the difference between different patterns. They also were sensitive to where it occurred in the order.

    Gervain is excited by these findings because the order of sounds is the building block of words and grammar." Position is key to language," she says. "If something is at the beginning or at the end, it makes a big difference: John caught the bear.' is very different from 'The bear caught John.'”

    Researchers led by scientist Patricia Kuhl have found that language delivered by televisions, audio books, the Internet, or smartphones－no matter how educational－doesn't appear to be enough for children's brain development. They carried out a study of nine-month-old American babies. They expected the first group who'd watched videos in Chinese to show the same kind of learning as the second group who were brought face-to-face with the same sounds. Instead they found a huge difference. The babies in the second group were able to distinguish between similar Chinese sounds as well as native listeners. But the other babies－regardless of whether they had watched the video or listened to the audio－learned nothing.

"I have not failed. I've just found 10,000 ways that won't work." Those are the words of Thomas Alva Edison, one of the greatest {#blank#}1{#/blank#} (inventor) in the history of the United States.

Edison, who grew up in the Midwest, was {#blank#}2{#/blank#} (large) self-educated. He earned 1,093 patents in his lifetime, including the lightbulb. Being {#blank#}3{#/blank#} successful businessman, Edison often reworked existing technology, making it more practical for widespread use.

Edison was born on February 11, 1847, a day that {#blank#}4{#/blank#} (celebrate) as National Inventors' Day today. The Thomas Edison Center, which was created in memory of Edison, is at Menlo Park in New Jersey. It is said that the seven years Edison spent at the lab he created in New Jersey were the most {#blank#}5{#/blank#} (product).

"Menlo Park is the birthplace of {#blank#}6{#/blank#} (record) sound. It was in Menlo Park {#blank#}7{#/blank#} Edison invented the phonograph （留声机） in 1877. The invention led to the 30-year-old Ohio native's international fame. From then on, he was known {#blank#}8{#/blank#} the "Wizard （奇才） of Menlo Park."

A phonograph was the first device that was used {#blank#}9{#/blank#} (reserve) sound. It was the precursor （先驱） to record albums and CDs. The original model had no volume knob （旋钮）, so listeners would have to control the sound by {#blank#}10{#/blank#} (place) a sock in the machine. That's where we get the expression "put a sock in it", which means "stop talking".