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
Imagine eating everything delicious you want—with none of the fat That would be great, wouldn’t it? New "fake fat" products
Imagine eating everything delicious you want—with none of the fat That would be great, wouldn’t it? New "fake fat" products
admin
2016-04-30
38
问题
Imagine eating everything delicious you want—with none of the fat That would be great, wouldn’t it?
New "fake fat" products appeared on store shelves in the United States recently, but not everyone is happy about it. Makers of the products, which contain a compound called olestra, say food manufacturers can now eliminate fat from certain foods. Critics, however, say the new compound can rob the body of essential vitamins and nutrients and can also cause unpleasant side effects in some people. So it’s up to consumers to decide whether the new fat-free products taste good enough to keep eating.
Chemists discovered olestra in the late 1960s, when they were searching for a fat that could be digested by infants more easily. Instead of finding the desired fat, the researchers created a fat that can’t be digested at all.
Normally, special chemicals in the intestines(肠)"grab" molecules of regular fat and break them down so they can be used by the body. A molecule of regular fat is made up of three molecules of substances called fatty acids.
The fatty acids are absorbed by the intestines and bring with them the essential vitamins A, D, E, and K. When fat molecules are present in the intestines with any of those vitamins, the vitamins attach to the molecules and are carried into the bloodstream.
Olestra, which is made from six to eight molecules of fatty acids, is too large for the intestines to absorb. It just slides through the intestines without being broken down. Manufacturers say it’s that ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular fat without any bad effects on the body. But critics say olestra can prevent vitamins A, D, E, and K from being absorbed. It can also prevent the absorption of carotenoids(类胡萝卜素), compounds that may reduce the risk of cancer, heart disease, etc.
Manufacturers are adding vitamins A, D, E, and K as well as carotenoids to their products now. Even so, some nutritionists are still concerned that people might eat unlimited amounts of food made with the fat substitute without worrying about how many calories they are consuming.
Olestra is different from ordinary fats in that _____.
选项
A、it facilitates the absorption of vitamins by the body
B、it passes through the intestines without being absorbed
C、it helps reduce the incidence of heart disease
D、it prevents excessive intake of vitamins
答案
B
解析
第6段首句提到“Olestra因体积太大,含有6—8个脂肪酸分子,而不能被肠胃分解吸收”,因此B正确。A、D与文中所表达的意思相悖;只有类胡萝卜素才有此功能,因此C不对。
转载请注明原文地址:https://kaotiyun.com/show/RCG7777K
0
大学英语六级
相关试题推荐
A、Byappealingtohisbuyingmotives.B、Byadvocatingthehighqualityoftheproducts.C、Makinguseofpeople’skindness.D、By
A、Tofindabettersciencejournalinthelibrary.B、Nottomissanychancetocollectusefulinformation.C、Tobuythelatesti
Ithinkthat,fromabiologicalstandpoint,humanlifealmostreadslikeapoem.Ithasitsownrhythmandbeat,itsinternalcy
Peopletendtounderestimatetheirlifeexpectancy,andit’snotsurprising.It’sthelook-aroundproblemagain:You【C1】______fr
A、Sheshouldtakesomemedicineandmorewater.B、Sheshouldtakecareofherrestanddrinkmorewater.C、Sheshouldgiveuphe
A、Byspendingtaxmoneytocleanabandonedcarsoffthestreet.B、Bytowingthemwiththemoneyfromtherecyclingofmetalint
A、Overamillionabandonedcarsaretowedfromthestreetseachyear.B、Onethirdofthenation’scarsareabandonedinthestre
Negotiationsworkwonders.Thisisparticularlysoininternationalbusinesssinceitismostlythroughnegotiationsthatexport
Negotiationsworkwonders.Thisisparticularlysoininternationalbusinesssinceitismostlythroughnegotiationsthatexport
Negotiationsworkwonders.Thisisparticularlysoininternationalbusinesssinceitismostlythroughnegotiationsthatexport
随机试题
服务进口国的消费者直接到服务出口国来消费和享用服务被称为
阅读下面的文字:登兹楼以四望兮,聊暇日以销忧。览斯宇之所处兮,实显敞而寡仇。挟清漳之通浦兮,倚曲沮之长洲。背坟衍之广陆兮,临皋隰之沃流。北弥陶牧,西接昭丘。华实蔽野,黍稷盈畴。虽信美而非吾土兮,曾何足以少留!遭纷浊而迁逝兮,漫逾纪以迄今
A.5周以内B.10周以内C.11~14周D.14~24周E.24周以上
盆式支座竖向承载力试验正式加载前需对支座进行三次预压,预压初始荷载为该试验支座竖向设计承载力的()。
甲公司与乙银行订立一份借款合同,甲公司到期未还本付息。乙银行于还本付息期届满后1年零6个月时向有管辖权的人民法院起诉,要求甲公司偿还本金、支付利息并承担违约责任。乙银行的行为引起诉讼时效中断。()
Allofthe2019NobelPrizesinsciencewereawardedtomen.That’sareturntobusinessasusual,afterbiochemicalengineerFr
有表名为Employee的表结构(职工号,姓名,工资),为表Employee增加字段“住址”的SQL命令是
Whatdidpeopleoncethinkaboutlightning?
Whoisthistalkprobablyaddressedto?
A、Hertestpaperwasunexpectedlylost.B、Hertestmarkwasn’tasbadasshethought.C、Shefeelsgreataboutthemarkonherpa
最新回复
(
0
)