题目内容

9.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 socializing 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 socializing,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.,

67.What information can we get from the first two paragraphs?D
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.
68.Which of the following statement does the text support?A
A.Levels of brown fat can be increased by socializing.
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.
69.We can conclude from the text thatC.
A.the fat in mice's belly was reduced because of the relaxing environment
B.a 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
70.What's the main idea of the text?D
A.Brown fat is beneficial to people's health.
B.Socializing is unnecessarily important in people's daily life.
C.White fat can be changed into brown fat.
D.Socializing contributes to people's losing weight.

分析 本文讲述了一项关于减肥的研究.以小老鼠的例子告诉人们应该积极参加社交活动多锻炼,而不是总待着不动.研究人员表示,社交活动和朋友聚会能帮助提高体内"棕色脂肪"的含量,这种脂肪可以燃烧卡路里,产生热量,从而有助于减肥.

解答 67.D 细节理解题.根据第二段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.可知美国研究者认为社交兴奋感可以把"白色脂肪"转化为"棕色脂肪",从而有助于减肥."白色脂肪"储存卡路里,使人们长胖,而"棕色脂肪"能够燃烧能量,产生热量.故选D.
68.A 细节理解题.根据第二段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.可知把"白色脂肪"变成"棕色脂肪"是非常困难的,通常需要长期呆在寒冷的条件下或神经系统处于兴奋状态.由此推知,棕色脂肪的含量可以通过社交来增加.故选A.
69.C 推理判断题.根据最后一段Explaining how new technology had threatened face-to-face socializing,he added,"It's not just a sedentary(久坐的) lifestyle and high calorie foods,but an increasing lack of social activities.可知上网可能会影响人们的面对面交流.故选C.
70.D 主旨大意题.根据第一段可知科学家研究发现,与在跑步机上锻炼几个小时相比,跟朋友一起参加社交活动更有利于保持苗条身材.研究人员表示,社交活动和朋友聚会能帮助提高体内"棕色脂肪"的含量,这种脂肪可以燃烧卡路里,产生热量.所以有助于减肥.故选D.

点评 本文考察学生的理解推断能力以及细心程度,只要抓住文章的关键词,采用寻读的方法查找细节,就能找到正确答案.

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4.As science and technology make rapid progress,it is hard to predict what would happen in life by 2030.However,people believe life will probably make a big difference by then.
TV channels will have disappeared.Instead,people will choose a program from a"menu"and a computer will send the program directly to the television.Today,we can use the World Wide Web to read newspaper stories and see pictures on a computer thousands of kilometers away.By 2030,music,films,programs,newspapers,and books will come to us by computer.
Cars will run on new,clean fuels and they will go very fast.Cars will have computers to control the speed and there won't be any accidents.Today,many cars have computers that tell drivers exactly where they are.By 2030,the computer will control the car and drive it to your destination.Space planes will take people halfway around the world in two hours.Today,the United Sates Space Shuttle can go into space and land on Earth again.By 2030,space planes will fly all over the world and people will fly from Los Angeles to Tokyo in just two hours.
Robots will have replaced people in factories.Many factories already use robots.Big companies prefer robots-they don't ask for pay rises or go on strike,and they work 24hours a day.By 2030,we will see robots everywhere-in factories,schools,offices,hospitals,shops and homes.
Medical technology will have conquered many diseases.Today,there are electronic devices(装置)hat connect directly to the brain to help people hear.By 2030,we will be able to help blind and deaf people to see and hear again.
Scientists will have discovered how to control genes.Scientists have already produced clones of animals.By 2030,scientists will be able to produce clones of people,and decide how they look,how they behave and how much intelligence they have.Scientists will be able to do these things,but should they?

57.Which of the following can NOT be turned into reality today?D
A.Creating cloned animals.
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D.People can travel around the world by space plane
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D.are not on duty
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