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" produ
Imagine eating everything delicious you want - with none of the fat. That would be great, wouldn’t it? New "fake fat" produ
admin
2010-04-24
75
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 stone 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 chemical 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 carded 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 mad 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 passes though the intestines without being absorbed
B、it facilitates the absorption of vitamins by the body
C、it helps reduce the incidence of heart disease
D、it prevents excessive intake of vitamins
答案
A
解析
Olestra不同于一般的脂肪。它由六到八个脂肪酸分子组成,体积太大,肠胃无法吸收;它可以穿过肠胃而不被分解。(参见第六段)
转载请注明原文地址:https://kaotiyun.com/show/mn2K777K
0
专业英语四级
相关试题推荐
Since1895theNationalTrust(国家文物信托基金会)hasworkedforthepreservationofplacesofhistoricinterestandnaturalbeautyi
Since1895theNationalTrust(国家文物信托基金会)hasworkedforthepreservationofplacesofhistoricinterestandnaturalbeautyi
Since1895theNationalTrust(国家文物信托基金会)hasworkedforthepreservationofplacesofhistoricinterestandnaturalbeautyi
Since1895theNationalTrust(国家文物信托基金会)hasworkedforthepreservationofplacesofhistoricinterestandnaturalbeautyi
Since1895theNationalTrust(国家文物信托基金会)hasworkedforthepreservationofplacesofhistoricinterestandnaturalbeautyi
WhyisthewomaninterestedinworkingwithProfessorSmith?
Imaginethatyou______ontoanotherplanet.
Everything________intoconsideration,IproposethatthefirstprizeshouldbegiventoLinQiang.
Ifeverythinggoeswell,thepatientwillsoonbe______fromthehospital.
随机试题
人体骨数最多的时期为
患者女性,40岁。低热、盗汗、腹胀1个月就诊。查体:全腹轻压痛,肝脾未及,移动性浊音(+),腹水为黄色渗出液,腺苷脱氨酶(ADA)80U。结核性腹膜炎的抗结核治疗,下列哪项不正确
拟建的地铁车站将建于正在运行的另一条地铁之下,两者间垂直净距2.8m,为粉土地基,无地下水影响,问下列哪一种施工方法最合适?()
(2006年,2010年)微分方程y"+2y=0的通解是()。
年度发生的关联交易金额在()万元人民币以上适用于预约定价安排。
社会保险行政部门应当自受理工伤认定申请之日起()日内作出工伤认定的决定,并书面通知申请工伤认定的职工或者其近亲属和该职工所在单位。
以划拨方式取得土地使用权,经批准转让房地产时,还应交纳契税。()
孤独之旅①油麻地家底最厚实的一户人家,就是杜小康家,但它竞在一天早上,忽然一落千丈,跌落到了另一番境地里,杜家的独生子杜小康失学了,只好跟着父亲去放鸭。②日子一天一天地过去了,父子俩也一天一天地感觉到,他们最大的敌人,也正在一步一步地向
下列各句中,加下划线词没有错别字的是:
Wouldyoumind______thecomputergameinyourroom?
最新回复
(
0
)