Q: I'm taking a test and have to guess the right answer to the question after the article. Article: Everyone is familiar with white fat, which serves as an energy warehouse. Many mammals also have brown fat, which has the unique ability to produce heat. Brown fat is sometimes mistaken for a type of gland , which it resembles more than white fat. It varies in color1 from dark red to tan. When the animal is exposed to a cold environment, the color1 darkens. In contrast to white fat, brown fat has numerous nerves which provide sympathetic stimulation to the fat cells. Brown fat is most noticeable in newborn animals, wrapped round the central organs to keep them warm. In human infants it occupies up to 5% of body weight, then declines gradually. Certain quantities of brown fat can be discovered in adult humans, especially when they are exposed to cold temperatures. Most of brown fat in adults is located in the lower neck. Exposure to cold leads to sympathetic stimulation of brown fat cell. As in white fat, sympathetic stimulation promotes hydrolysis of triglyceride , with release of fatty acids. In contrast to other cells, including white fat cells, brown fat cells express UCP1, which gives the cell's mitochondria an ability to produce heat rather than ATP. Within brown fat cells, most fatty acids are immediately combined with oxygen in mitochondria and a large amount of heat is produced. There is only about 50g of brown fat in the neck region and it switches on and off throughout the day as it's exposed to different temperatures or if you exercise or eat. But this capacity is much greater in young children compared with adolescents and adults. The challenge is now to use the knowledge to find out what might switch on brown fat. If it is switched on, we can benefit from it. Brown fat produces lots of heat by burning calories. Unlike white fat, brown fat does not expand our ageing waistlines. And that's why the race is on to find out more about brown fat, and how humans could use it to our advantage, though we would waste energy unnecessarily, and we would sweat a lot and forever be opening windows. Question: Which is the unique factor of brown fat producing heat? Options: A: Fatty acids. B: Triglyceride. C: UCP1. D: ATP.
A: C

Q: I'm taking a test and have to guess the right answer to the question after the article. Article: So you're beween the ages of 13 and 24.What makes you happy? A worried,weary parent might imagine the answer to sound something like this:sex,drugs,a little rock 'n' roll .Maybe some cash,or at least the car keys. It turns out the real answer is quite different Spending time with family is the top answer to that open-ended question,according to an extensive sur-vey--more than 100 questions asked of 1,280 people aged 13-24--conducted by The Associated Press and MTV on the nature of happiness among America's young people. Next is spending time with friends,follwed by time with a significant other.And even better for parents:Nearly three quarters of young people say their relationship with their parents makes them happy. "They're my foundation,"says Kristiana St.John,17,a high-school stu-dent from Queens in New York."My mom tells me that even if I do something stupid,she's still going to love me no matter what.Just knowing that makes me feel very happy and blessed." You might thik money would be cleauly tied to a general sense of happi-ness.But almost no one says"money" when asked what makes them happy,though people with the highest family incomes are generally happier with life.However,having highly educated parents is a stronger predictor of happiness than income. From the body to the soul:Close to half say religion and spirituality are very important.And more than half say they believe there is a higher power that has an influence over things that make them happy.Beyond religion religion,simply belonging to an organized relious group makes people happier. And parents,here's some more for you:Most young people in school say it makes them happy.Overwhelingly ,young people think mar-riage would make them happy and want to be married some day,Most also want to have kids. Finally,when asked to name their heroes,nearly half of respondents men-tioned one or both of their parents.The winner,by a nose:Mom. Question: What Kristiana St.John sas shows that _ . Options: A: her mother is as clever as the other mothers B: her mother loves her unconditionally C: she is stupid and often does foolish things D: she takes it a happy thing to cheat her mother
A: C

Q: I'm taking a test and have to guess the right answer to the question after the article. Article: If you hear the sound of running water the next time you call a co-worker on his or her mobile phone, don't be surprised. Three-fourths of Americans with mobile phones say they use them in the bathroom, a new study shows. Approximately the same number of men and women have used the phone in the bathroom, according to a survey of 1,000 Americans by 11mark, an integrated marketing agency, although men seem more attached to IT in the toilet: 30 percent of men versus 20 percent of women agreed with the statement, "I don't go to the bathroom without my mobile phone." More than half the surveyed users (63 percent) said they have answered a phone call in the bathroom, and almost half (41 percent) reported _ a phone call. That's not all, however. What goes on behind the walls of the stalls is anything a mobile phone is capable of. Sixty-seven percent said they have read a text, and 39 percent have surfed the Web. Men work more from the bathroom -- 20 percent said they have participated in work-related calls, versus 13 percent of their female colleagues. As expected, Gen Y respondents are the pacesetters in the "mobile everywhere" movement, with 91 percent using their phone in the bathroom. Still, older generations are not far behind. Eighty percent of Gen X(1961-1981) reported using the phone in the bathroom, as did 65 percent of Baby Boomers and 47 percent of the Silent Generation. While online, they are doing more than just surfing; 16 percent of Gen Y report they have made an online purchase while in the bathroom. Users of iPhones are particularly likely to browse and buy in the bathroom - 22 percent have made a purchase, versus 10 percent of Americans with mobile phones overall. "The writing is on the stall," said 11mark principal Nicole Burdette. "This study confirms what we all know: that the last private place is no longer private." In the process, high-tech hygiene is taking a hit, the survey found. While 92 percent of mobile phone users said they wash their hands after using the bathroom, only 14 percent... Question: 60.According to his words, Nicole Buedette mainly wants to tell us that _ . Options: A: no wonder mobile phones are used in the bathroom B: the bathroom is a private place for people C: it makes people have no privacy at all D: more men have used the phone in the bathroom
A: C