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
29
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://jikaoti.com/ti/X6gFFFFM
0
大学英语六级
相关试题推荐
IntotheUnknownTheworldhasneverseenpopulationageingbefore.Canitcope?[A]Untiltheearly1990snobodymu
Tounderstandwhyweshouldbeconcernedabouthowyoungpeopleread,ithelpstoknowsomethingaboutthewaytheabilitytore
GeorgeHerbertMeadsaidthathumansaretalkedintohumanity.Hemeantthatwegainpersonalidentityaswecommunicatewithot
A、Havesomefreshfruit.B、Takeahotshower.C、Exerciseatthegym.D、Eatahotdinner.C选项均以原形动词开头及其中的freshfruit和gym表明,本题可能考查
A、Atthepostoffice.B、Attheshop.C、Attherestaurant.D、Atthebank.B男士问女士要不要等衣服包装好自己带走,女士请男士在本周内送货,说明对话发生在商店里,只有在商店买东西的时候才
A、Shocked.B、Acceptable.C、Incredible.D、Indifferent.B女士提醒男士,每周的工作时间要超过50小时,压力大。男士欣然接受,并表示自己愿意接受挑战。故B是男士的态度。
A、Theman’swifeisdefinitelyanegativeperson.B、Shecouldn’tputupwiththeman’swifeanylonger.C、Theman’swifemustha
InternationalWomen’sDay(8March)isanoccasionmarkedbywomen’sgroupsaroundtheworld.Thisdateisalsocommemoratedatth
A、Well-dressedwomenandoldpeople.B、Travelersfromforeigncountries.C、Highschoolstudentsandrichteachers.D、Well-dresse
Foranyonewhohashadtowaitalongtimetoscheduleamedicalappointment,itmightseemasiftheworldneedsmoredoctors,
随机试题
目前使用的防静电涂料主要是通过在成膜物质中加入导电助剂。
小儿出生时即存在,而3个月~4个月消失的反射()
根尖周组织病最常见的原因是
题9~10:某钢筋混凝土梁,其截面尺寸b×h=200mm×500mm,抗震等级为二级,净跨lnn=2.0m。混凝土强度等级为C30,纵向受力钢筋采用HRB335级,箍筋采用HPB235级,αs=α’s=35mm。该梁考虑地震作用组合的弯矩设计值M=22
在岩石强度特性中,最为主要的特性要素为()。
背景资料:某施工单位承包了东风水库工程施工,制定的施工方案中部分内容如下:(1)水库大坝施工采用全段围堰法导流。相关工作内容有:①截流;②围堰填筑;③围堰拆除;④导流隧洞开挖;⑤下闸蓄水;⑥基坑排水;⑦坝体填筑。(2)岸坡石方
借款合同管理是贷款管理的重要组成部分,为实现信贷资金的(),银行必须加强借款合同的管理。
假设某基金持有的某三种股票的数量分别为10万股、50万股和100万股,每股的收盘价分别为30元、20元和10元,银行存款为1000万元,对托管人或管理人应付未付的报酬为500万元,应付税金为500万元,则基金资产净值总额为()万元。
依据唯物辩证法的根本观点,说明为什么不能仅仅以GDP作为衡量经济社会发展的唯一指标。
2010年8月15日,张某因涉嫌故意杀人罪被天河市通河县公安局依法逮捕,羁押于通河县看守所某监室,后与另一案件犯罪嫌疑人杨某一同转移至新监室。2010年11月30日零时55分左右,张某见管教民警巡查监室离开后,拿出事先藏于棉絮中的一节10厘米长的旧铁丝(该
最新回复
(
0
)