36. We learn from the passage that olestra is a substance that_______.
A) contains plenty of nutrients
B) renders foods calorie-free while retaining their vitamins
C) makes foods easily digestible
D) makes foods fat-free while keeping them delicious
37.The result of the search for an easily digestible fat turned out to be_______.
A) commercially useless
B) just as anticipated
C) somewhat controversial
D) quite unexpected
38.Olestra is different from ordinary fats in that_______.
A) it passes through 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
39.What is a possible negative effect of olesira according to some critics?
A) It may impair the digestive system.
B) It may affect the overall fat intake.
C) It may increase the risk of cancer.
D) It may spoil the consumers appetite.
40.Why are nutritionists concerned about adding vitamins to olesira?
A) It may lead to the over-consumption of vitamins.
B) People may be induced to eat more than is necessary.
C) The function of the intestines may be weakened. 跨段
D) It may trigger a new wave of fake food production.
Imagine eating everything delicious you want - with none of the fat. That would be great, wouldnt 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 its up to decide whether the new fat-free products taste good enough to keep eating.
注:eliminate消除
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 cant be digested at all.
Normally, special chemicals in the intestines 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 molecule 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 its 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 , 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.
原文重现、尽量少读、怎样找到but, only 细节题(一般读两三行)
俚语: 小傻瓜,小笨蛋
一“穗”玉米 vs. 一“耳朵”玉米
“老糊涂”怎么说
“凑份子”怎么说
俚语:我是单身,我很自由!
口语:今儿个“真高兴”
俚语:注意,听(我)说!
警言:“微薪养蠢材!”
趣解“赊账”
“挑灯夜读”怎么说?
口语:我说了算
请不要“推卸责任”
口语:“你这人真逗!”
“眼冒金星”怎么说
事实胜于雄辩
口语:“该请的、不该请的,全请来了”
Break a leg: 祝好运!
俚语:很久、很久
“出尔反尔、摇摆不定”,你会吗?
请进!中国的“雅皮士”(新词热议)
俚语:“老啦!”(女士专用语)
俚语:博得满堂彩
“奇/偶数”
“幽会”怎么说
“三伏”正当时!
习语:风水轮流转
徒劳,白费力,无益的追求
“山穷水尽”疑无路,柳暗花明又一村
“摇钱树”!
猜谜语记俗语:晴天霹雳
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |