首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、There is not enough financial support. B、It is difficult to measure calories in humans. C、Humans’ life span is much longer. D、
A、There is not enough financial support. B、It is difficult to measure calories in humans. C、Humans’ life span is much longer. D、
admin
2014-09-30
67
问题
(20)A study of monkeys over a 20-year period suggests that eating less may extend life and prevent disease. American researchers said they believe their findings could apply to people as well. Richard and his team did the research. Half of the monkeys were permitted to eat as much as they wanted. The other half ate a controlled diet. They were fed 2/3 of the calories they would otherwise choose to eat. The researchers found that 37% of the monkeys that ate as much as they wanted had died of causes related to aging after 20 years. In comparison, only 13% of the monkeys on restricted diets had died. On average, monkeys live about 27 years in captivity, that is, when they live with humans and not in the wild. Richard says researchers do not know why reducing calories increases the length of life. But they believe there is a helpful change in the way the body processes energy in the monkeys that eat fewer calories. Extended life was not the only observable difference between the two groups. The monkeys that ate less had half the amount of heart disease and cancer. The study was paid for by the US National Institute on Aging.(21)Some critics say more research is needed to prove that calorie restriction extends life in monkeys. Richard says his study is not complete and that his team will continue to observe the remaining monkeys throughout their lives. Scientists first studied the effects of calorie restriction on aging in the 1930s. Since then, similar studies have shown life-extending effects of reduced diets on rodents(啮齿动物)and worms. Scientists are currently studying the effects of restricted diets on people.(22)However, this is more difficult because it is harder to control the diets of people and because they live longer than other animals.
20. What can we learn from the study?
21. What needs to be done according to some critics?
22. Why is it hard to study the effects of restricted diets on people?
选项
A、There is not enough financial support.
B、It is difficult to measure calories in humans.
C、Humans’ life span is much longer.
D、The rules for monkeys don’t apply to humans.
答案
C
解析
短文末尾提到科学家们正在研究控制饮食对人类的影响,但这一研究更为困难,因为人类的饮食更难控制,而且人类的寿命比其他动物的寿命更长。
转载请注明原文地址:https://kaotiyun.com/show/BQm7777K
0
大学英语六级
相关试题推荐
A、Promiselong-termcooperationwiththeCompany.B、Explainfranklytheirowncurrentfinancialsituation.C、Payfortheprintin
Tounderstandwhyweshouldbeconcernedabouthowyoungpeopleread,ithelpstoknowsomethingaboutthewaytheabilitytore
GeorgeHerbertMeadsaidthathumansaretalkedintohumanity.Hemeantthatwegainpersonalidentityaswecommunicatewithot
A、Offerhelptocrimevictims.B、Workasanewspapereditor.C、Writeaboutsomethingpleasant.D、Dosomeresearchonlocalpolit
A、Hecanofferamuchcheaperpriceforthiscar.B、Hisannualsavingsarequiteenoughtobuythiscar.C、Thiscarneedslessp
Postgraduatedilemmas[A]Decidingwhetherornottobecomeapostgraduatecanbeadaunting(令人畏缩的prospect.Evenifyouaresur
InternationalWomen’sDay(8March)isanoccasionmarkedbywomen’sgroupsaroundtheworld.Thisdateisalsocommemoratedatth
Apioneeringheadteacheriscallingforallsecondaryschoolstofollowhisleadandstartclassesat11am,allowingteenagers
A、Hermemorytestedasaverageforherage.B、Sheputonlotsofweight.C、Shegotajobasamathtutor.D、Hermemorywasequal
HowtoDealwithPeerPressures?1.人们往往感受到来自同龄人的压力2.如何缓解来自同龄人的压力
随机试题
王某,男,40岁,多年怕热多汗,焦躁易怒,心率118次/分,多食易饿,体重下降。经查FT4及FT增高,昨天体温突然升高达39.5℃,心率161次/分,烦躁不安,呼吸急促,腹泻,急诊为甲状腺功能亢进伴甲状腺危象。其原因是
不属于医学伦理学原则的是( )
婴儿痉挛首选全身强直-阵挛发作与局限性发作
患者,男,79岁。有冠心病病史多年,形神衰败,身体赢瘦,大肉尽脱,伴心悸自汗,神倦嗜卧,心胸憋闷疼痛,形寒肢冷,面色苍白,舌淡苔白,脉细弱。该患者治疗时,宜首选
()特点是油脂、悬浮物和有机物含量高。
过失犯罪的人虽然也受到过刑罚的制裁,但仍然可以申清领取导游证,旅游主管部门也可以对其颁发导游证。()
有三个旅行团同时进住南京某饭店后,惟有A团一位客人的行李未送进房间,短时间内未能找到,地陪导游员下列做法中正确的是()。
民间美术的艺术语言特征是()
牙本质中龋时牙髓受刺激后可造成()。
Humour,whichoughttogiverisetoonlythemostlight-heartedandgayfeelings,canoftenstirupvehemenceandanimosity.Evi
最新回复
(
0
)