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托福TPO52综合写作题目及范文(附解析)

2018-12-17 16:11 三立在线 admin

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摘要:TPO52综合写作的阅读要点内容为蔗糖可能带来许多健康风险,当作为糖的替代品。今天给大家带来写作思路解析及范文,希望对大家有帮助。 托福TPO52综合写作题目 听力文本: M: Now listen to part of a lecture on the topic you just read about: M: Many studies have found sucralose to be perfectly safe for people to consume. And it is useful for people who are trying to lose weight. The readi

TPO52综合写作的阅读要点内容为蔗糖可能带来许多健康风险,当作为糖的替代品。今天给大家带来写作思路解析及范文,希望对大家有帮助。


  托福TPO52综合写作题目


  听力文本:


  M: Now listen to part of a lecture on the topic you just read about:


  M: Many studies have found sucralose to be perfectly safe for people to consume. And it is useful for people who are trying to lose weight. The reading’s arguments against using sucralose can all be challenged.


  First, about sucralose affecting the thymus. If you look closely at the studies of sucralose consumption, there were no effects on the rats at all until they were eating extremely large quantities of sucralose. In order for a human to eat the equivalent amounts that affected the rats being studied, a human would have to consume about 4000 packets of sucralose per day for a month.


  Second, sure, some organochlorines are toxic. If they are consumed, they are digested and stored in fat tissue, and they continue to build up in the fat tissues till they reach toxic levels. But studies show sucralose is a bit different from the other organochlorines. Sucralose is not absorbed by the digestive system very well and so it does not accumulate in the body’s fat tissue. Since sucralose is not absorbed well by the digestive system and doesn’t build up to dangerous levels in fat tissue, it is unlikely to have the toxic effect that the other organochlorines do.


  Finally, there is the argument that many people who use artificial sweeteners in their drinks end up eating lots of real sugar in food like cake, and so they negate the benefits of using the sweetener. Well, that argument may hold true for many artificial sweeteners but sucralose has a unique property that makes it different. Most artificial sweeteners break down if they are heated too much, but sucralose does not break down when heated. That means that unlike other sweeteners, sucralose can be used to bake things, like cakes and cookies, for example. People craving something sweet can turn to cakes or cookies baked with sucralose, which helps them keep their diets on track.


  M: Summarize the points made in the lecture, being sure to explain how they challenge the specific points made in the reading passage.


  阅读文本:


  Reading


  Sucralose is an artificial sweetener that is used in place of natural sugar. Many people use sucralose as a substitute for sugar to control their weight. However, there may be several health risks associated with sucralose. Also, it is not clear whether sucralose actually helps people lose weight.


  First, researchers in Australia did studies on rats and discovered that sucralose consumption caused shrinking of the thymus in rats. The thymus is an organ that is crucial to maintaining a healthy immune system; in humans it is particularly active in childhood. If sucralose has similar effects on humans, then long-term use of sucralose could cause harm to the immune system, especially in children.


  Second, sucralose is created by replacing some of the atoms in natural sugar molecules with chlorine. This means sucralose belongs to a group of chemicals called organochlorines, which is another cause for concern. Organochlorines are known to be toxic to plants and animals, including humans. Some organochlorines are even used as pesticides. Sucralose is chemically similar to these toxic chemicals, so there may be a risk of poisoning if sucralose builds up in human body tissue (in fat tissue, for example).


  Third, substituting artificial sweeteners for real sugar in coffee, tea, and soft drinks often does not help people lose weight, since it reinforces the habit of enjoying sweet food. When people use artificial sweeteners in their drinks, their appetite for sugar remains strong, and they satisfy their sweetness cravings by eating greater portions of foods containing real sugar, such as cakes or cookies. Such eating habits can prevent them from achieving their goal of losing weight.


  Summarize the points made in the lecture, being sure to explain how they support/contradict specific points made in the reading passage.


  答题思路:1. 阅读要点概括:


  Main point: Sucralose may bring about many health risks when used as a substitute for sugar.


  Sub point 1: Sucralose may cause harm to the immune system.


  Sub point 2: There may be a risk of poisoning if sucralose builds up in human body tissue.


  Sub point 3: Substituting artificial sweeteners for real sugar does not help people lose weight.


  2. 听力要点概括:


  Main point: Sucralose is perfectly safe for people to consume.


  Sub point 1: It requires a consumption of extremely large quantities of sucralose to affect the thymus.


  Sub point 2: Sucralose does not accumulate in the body’s fat tissue so that it is unlikely to have the toxic effect.


  Sub point 3: People can use sucralose to replace sweet while keep their diets on track.


  范文:


  The speaker rebuts the reading’s arguments by debunking the exaggerated tested side effect on the human body, the hasty generalization that sucralose is proven toxic, and unwarranted claims that Sucralose can increase one’s sugar intake.


  The speaker begins by stating that Sucralose does affect the thymus, but only when the individual consumes a very large quantity of it, over 4000 packets per day. Despite the claim from the reading that sucralose might exert similar detrimental effects on a human thymus given the conclusive side effect has been witnessed in rats, the professor argues Sucralose can only pose a threat to one’s health under mass usage.


  Contrary to the belief in the passage that it belongs to a group of toxic chemicals called Organochlorines, Sucralose has been shown to act differently than traditional Organochlorines. The professor argues that people have a hard time fully digesting it and it does not build up in the body, therefore it is much less toxic. This directly challenges the fundamental theory in reading.


  Lastly, the professor casts doubt on the validity of the assumption that sucralose can encourage binge intakes of sweet food. The reading reasons that sucralose can build a growing reliance on sweetness, thus further damaging one’s health.


  However, the speaker maintains that the very nature of Sucralose can endure a high heating temperature, thus serving as a perfect candidate to replace artificial sweeteners. In that sense any unfair concern over Sucralose being a gateway sugar inducer would be groundless.

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