Keeping a busy social life among lots of friends may keep people thinner than spending hours doing some exercises, according to scientists. They say that socialising and meeting with friends help increase levels of brown fat in the body which burns calories(卡路里)to produce heat.
Living in an exciting social environment was found to reduce fat in mice's belly by half over four weeks, even if they ate more. US researchers say that social excitement aids weight loss by turning white fat into brown. White fat stores calories and makes us fatter, while brown burns energy to produce heat. Turning white fat into brown is extremely difficult，normally
requiring long- term stay in cold conditions or exciting part of the body's nervous system.
However, scientists from Ohio State University now think that having a busy social life is an even more effective way of changing white fat into brown. The team came up with their theory by studying the effects of various living environments on mice. Those, who lived alongside a greater number of mice, had more space and toys to excite themselves and then lost far more weight over the course of the study than their “couch potato" fellows.
Study author, Dr Matthew During, whose team's findings appear in the journal Cell Metabolism, said, "I'm still amazed at the degree of fat loss that occurs." Explaining how new technology had threatened face-to-face socialising, he added, "It's not just a sedentary(久坐 的)lifestyle and high calorie foods, but an increasing lack of social activities." Co-author Dr Lei Cao said，"Loneliness is a potential factor for cancer and death; it's equal to cigarette smoking to a certain extent. Social activities are very vital.，，
【小題1】What information can we get from the first two paragraphs?

A．Brown fat stores calories and makes us fatter.
B．It doesn't take long to turn white fat into brown.
C．Social excitement helps gain more weight.
D．Brown fat can burn energy to produce heat.
【小題2】Which of the following statement does the text support?
A．Levels of brown fat can be increased by socialising.
B．The mice lacking social life lose more weight.
C．The research findings haven't been published so far.
D．Dr Matthew During wasn't convinced of the result.
【小題3】We can conclude from the text that _______.
A．the fat in mice's belly was reduced because of the relaxing environment
B．a(chǎn) sedentary lifestyle and high calories foods influence people's social life
C．surfing the Internet may influence people's face-to-face communication
D．cancer and death are mainly caused for lack of social life
【小題4】What’s the main idea of the text?
A．Brown fat is beneficial to people's health.
B．Socialising is unnecessarily important in people's daily life.
C．White fat can be changed into brown fat.
D．Socialising contributes to people's losing weight.


【小題1】D
【小題2】A
【小題3】C
【小題4】D

解析【小題1】細(xì)節(jié)題。結(jié)合第二段brown burns energy to produce heat.（棕色脂肪可以燃燒卡路里，產(chǎn)生熱量）可選出答案。
【小題2】細(xì)節(jié)題。結(jié)合第一段socialising and meeting with friends help increase levels of brown fat（社交活動(dòng)和與朋友聚會(huì)幫助提高棕色脂肪）可選出答案。
【小題3】推斷題。結(jié)合Explaining how new technology had threatened face-to-face socialising, he added, "It's not just a sedentary(久坐 的)lifestyle and high calorie foods, but an increasing lack of social activities（解釋新科技如何威脅到面對(duì)面的社交活動(dòng)時(shí)，迪蘭博士補(bǔ)充說(shuō)：“這不僅會(huì)導(dǎo)致人們更喜歡坐著不動(dòng)，吃更多高卡路里食品，而且還會(huì)使人們?cè)絹?lái)越疏于社交�！保┛蛇x出答案。
【小題4】概括大意題。文章主要講述了“社交的興奮感有助于減肥。”。

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