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
考研
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it ? New "fake fat" product
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it ? New "fake fat" product
admin
2016-06-22
29
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(营养物)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(肠道)"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 blood stream.
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.
We learn from the passage that olestra is a substance that______.
选项
A、contains plenty of nutrients
B、makes foods fat-free while keeping them delicious
C、renders foods calorie-free while retaining their vitamins
D、makes foods easily digestible
答案
B
解析
我们可以从文章中得知olestra是一种不被消化吸收,但却能保持脂肪美味的物质。正确回答本题的关键在于理解第一段和第六段话的意思。
转载请注明原文地址:https://kaotiyun.com/show/TSQi777K
0
在职申硕(同等学力)英语
相关试题推荐
HowmanydollarsdidMissJoanhandtoMr.Greenly?Thephrase"subjecttochangewithoutnotice"suggests______
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothing.Icouldeverhaveimaginedformeormychildren,
Americanchildrencustomarilygotrick-or-treatingonHalloween.
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothingIcouldeverhaveimaginedformeormychildren.
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothingIcouldeverhaveimaginedformeormychildren.
Imagineaworldinwhichtherewassuddenlynoemotion--aworldinwhichhumanbeingscouldfeelnoloveorhappiness,noterror
Oneofthemostwidelydiscussedsubjectsthesedaysisenergycrisis.Automobiledriverscannotgetgasoline;homeownersmayno
Oneofthemostwidelydiscussedsubjectsthesedaysisenergycrisis.Automobiledriverscannotgetgasoline;homeownersmayno
Oneofthemostwidelydiscussedsubjectsthesedaysisenergycrisis.Automobiledriverscannotgetgasoline;homeownersmayno
随机试题
下列食物中膳食纤维含量最少的是()。
患者男性,35岁,因车祸致外伤,会阴疼痛,排尿困难,不能行走,脸色苍白,送至急症。手术后支架导尿管应当留置的时间为
《中华人民共和国海洋环境保护法》规定:海岸工程建设项目的环境影响报告书经海洋行政主管部门提出()后,报环境保护行政主管部门()。
进行气密性检查时,在试验介质中加入体积分数为1%()。
因采购的货物技术复杂或者性质特殊,不能确定详细规格或者具体要求的,可以采用询价式谈判方式采购。()
真核生物以DNA为遗传物质,部分原核生物以RNA为遗传物质。()
新民主主义文化就是无产阶级领导的人民大众的反帝反封建的文化,即民族的科学的大众的文化。新民主主义文化是“民族的”内涵是()
Writeanessayof160~200wordsbasedonthefollowingdrawing.Inyouressay,youshould:(1)describethedrawingbriefly,(2
以下叙述中正确的是
数据库系统又进一步把对数据逻辑结构的描述分为两个层次:子模式和模式。子模式说的是从一个个具体用户(局部的)角度看到的逻辑结构,模式说的是从全体用户(全局的)角度看到的逻辑结构。这样,整个的数据库系统从面向用户这一端到面向计算机的那一端分作了三个层次:外部层
最新回复
(
0
)