19．It's well established that people with low economic status are the hardest hit by the current obesity pandemic （肥胖症），as well as related health problems such as diabetes．Poor healthcare，stress，unhealthy lifestyles，and a lot of cheap junk food are all thought to play a role．But a new study suggests there's a subconscious （潜意识）component，too．
When researchers merely led study volunteers to consider themselves low-class，they were more likely to prefer，choose，and eat larger amounts of food，as well as higher-calorie foods．The findings，published in the Proceedings of the National Academy of Sciences，reflect what's been seen in a variety of animals．Thus，the authors assume that the mental problem may be an evolutionary holdover （遗贸物）intended to improve survival by compensating for a lack of social and material resources．More important for humans，the findings suggest that we may no!be able to deal with obesity by just improving access to healthier foods and promoting exercise．
For the study，psychology researchers at Nanyang Technological University in Singapore drafted nearly 500healthy participants for two experiments．In the first，the team had 101participants complete a task in which they were shown a ladder with ten steps and told to select which step they were on relative to either a wealthy，well-educated，powerful person or a poor，uneducated，unimportant person．Next，the participants got to pick foods from an imagined buffet．Taking into account things like each participant's normal eating pattern，hunger，and gender，the researchers found that those who ranked their social status lower chose more food and more high-calorie foods than those that ranked themselves as having a higher social status．
In the other experiment，researchers gave 167 participants the same socioeconomic ranking task，then asked them to match high calorie foods （pizza，hamburgers，fried chicken） and low calories foods （vegetables and fruits） with either pleasant or unpleasant descriptors，such as tasty or nasty．Again，those who landed lower on the ladder had a tendency to prefer the high-calorie
"These findings suggest that the thought of low social standing may be critically linked to obesity risk via increased intake of calories，"the authors conclude．As such，the subjective experience of low social standing may be another barrier to improving health．
62．What does the author want to reveal in the first paragraph？C
A．More and more people tend to suffer from diabetes．
B．Unhealthy lifestyles contribute to obesity pandemic．
C．Subconscious plays a part in causing obesity pandemic．
D．low-class people are less likely to be affected by diabetes．
63．What is the possible link between low-class people and animals？A
A．Consumption of larger amounts of food results from desire for survival．
B．Low-class people and animals are easily affected by mental disabilities．
C．Creatures consuming higher-calorie foods consider themselves low-class．
D．humans and animals have both consumed much food during evolution．
64．How can humans deal with obesity completely according to the findings？D
A．By carrying out the two experiments．
B．By adopting comprehensive approaches．
C．By accessing large amounts of healthy foods．
C．By getting involved in lots of physical exercise．
65．The passage mainly intends to inform us thatB．
A．findings remain to be proved
B．obesity pandemic represents risks
C．low social standing ruins dignity
D．positive thoughts help stay in shape．
分析 本文是一篇健康环保类阅读，属于说明文，主要讲述了经济状况较差的人群受到目前的肥胖症以及相关的健康问题如糖尿病的严重打击，保健，压力，不健康的生活方式和大量便宜的垃圾食品都是认为发挥作用．但是一项新的研究表明也有潜意识的原因．
解答 62．C．细节理解题．根据It's well established that people with low economic status are the hardest hit by the current obesity pandemic （肥胖症），as well as related health problems such as diabetes．Poor healthcare，stress，unhealthy lifestyles，and a lot of cheap junk food are all thought to play a role．But a new study suggests there's a subconscious （潜意识）component，too．可知，经济状况较差的人群受到目前的肥胖症以及相关的健康问题如糖尿病的严重打击，保健，压力，不健康的生活方式和大量便宜的垃圾食品都是认为发挥作用．但是一项新的研究表明也有潜意识的原因．故第一段告诉我们潜意识在导致肥胖症．故选C．
63．A．细节理解题．根据they were more likely to prefer，choose，and eat larger amounts of food，as well as higher-calorie foods可知，经济状况差的人和动物消耗大量的食物的结果是源于生存的渴望．故选A．
64．D．推理判断题．根据"These findings suggest that the thought of low social standing may be critically linked to obesity risk via increased intake of calories，"the authors conclude．As such，the subjective experience of low social standing may be another barrier to improving health．可知，社会地位低的想法可能通过增加摄入热量与肥胖风险密切相关，故可推测出，有效解决肥胖症的方法是锻炼．故选D．
65．B．主旨大意题．阅读全文，根据文章内容可知，本文主要讲述了肥胖发生的风险．故选B．
点评 本文是一篇健康环保类阅读，题目涉及多道主旨大意题，细节理解题，推理判断题．做题时学生应仔细阅读原文，把握文章主要内容，联系文章上下文内容并结合所给选项含义，从中选出正确答案，一定要做到有理有据，切忌胡乱猜测．
