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Article: A breathtaking trick potentially left over from our ancestors might be found in us -- the ability to sense oxygen through our skin. Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo. Now the same oxygen sensors found in frog skins and in the lungs of mammals have unexpectedly been discovered in the skin of mice. "No one had ever looked," explained Randall Johnson, a biologist researcher. Mice and frogs are quite distant relatives, so the fact they have these molecules in common in their skin suggests they might well be found in the skin of other mammals, such as humans. "We have no reason to think that they are not in the skin of people too," Johnson said. These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen--a dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone even after hours of such low oxygen. These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia without injecting drugs, which make up a multibillion-dollar market, Johnson said. Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. "It's hard to say what exactly might be done, however--there's a lot we don't know yet," Johnson explained. The scientists... Question: What is Johnson's attitude to the application of the findings to the athletes' training? Yes or no, is the answer "Positive"?
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No

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Article: A man enters a store to buy milk. He walks out of the store with milk. That is all--milk. At the same time, a woman enters the same grocery store also to buy milk. She buys it. But, she also buys chicken and lemons to make dinner that night. She also gets a bottle of wine for drinks with friends and a birthday card for her husband's niece. And that is the difference between the female and male brains simply explained in a grocery store. Generally speaking, men do one thing at a time. Women do many. Doing many things at one time is often called "multi-tasking," a very popular word these days. Now scientific research supports this theory about male and female brains. A recent study has confirmed what we have known all along--men and women think differently. Scientists at the University of Pennsylvania studied brain images of 949 people aged from 8 to 22 years old. They found that male brains have more connections on one side of the brain, or hemisphere. In the female brain, they found more activity and connections between the right and left sides of the brain. The left side of the brain is known as the side of "reason". The right hemisphere is known as the "creative" side. Regina Verma is a professor at the University of Pennsylvania. She co-wrote the report. She says when women are asked to do something complicated they might use different parts of the brain. But men generally use just one. As a result, men generally deal directly with a problem. There is a strong connection between the "understanding" and the "action" parts of their brains. Women, however, might include other parts of the brain, like the part connected with "reason" and the part connected with sensitivity when solving a problem. Women take a less direct path to find a solution. Thanks for your listening. I'm your announcer Anna Matteo. Question: Where does this passage probably come from? Yes or no, is the answer "A radio report."?
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Article: Sometimes people call each other " scared cat" , but have you ever thought about this expression? When a cat is frightened, its heart starts beating faster, its muscles get tense, and there are changes in the chemicals in its blood-stream. If the danger continues, this animal will do one of the two things. It will defend itself, or it will run away as fast as it can. Something like this also happens to people. When we are excited, angry, scared, or aroused by other emotions, our bodies go through many physical changes. Our hearts beat faster, and our muscles get tense. All of these changes make us more alert and ready to react. We, too, get ready to defend ourselves or run. Human beings, however, have a problem. If we give way to our feelings and let them take over, we can get into trouble. Have you ever said something in anger - and regretted later? Have you ever shouted at a teacher or told somebody you were lonely and then wished later you had kept your mouth shut? It isn't always wise to express your feelings freely. Does this mean that it's always smarter to hide our feelings? No! If you keep feelings like anger hidden away or bottled up inside, your body stays tense. Physical illnesses can develop, and you can feel disturbed badly inside. _ can actually be bad for your health. Feelings that you keep all bottled up inside don't just go away. It's as if you bought some bananas and stuck them in a cupboard. You might not be able to see them, but before long you'd smell them. And if you opened the cupboard, chances are you'd see little fruit flies hovering all over them. They'd be rotten. You can try to treat emotions as if they were bananas in the cupboard. You can hide them and you can pretend they don't exit, but they'll still be around. And at last you'll have to deal with them, just like those bananas. Question: According to the passage, human beings get into trouble because _ . Yes or no, is the answer "they sometimes can't control their feelings"?
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No