fair 나오기 전날에 쓴 것입니다. 시험때도 거의 이 비슷하게 썼는데요...
왜 fair 나왔는지 말씀해 주실 분?^^
The reading passage asserts that water fluoridation has several positive effects for people. However, the lecturer refutes this argument with different views.
To begin with, the lecturer argues that current toothpastes contain sufficient amount of fluoride. He also warns that excessive exposure of fluoride can cause brown decaying teeth, especially for children. This statement directly contradicts one point of the reading passage that fluoridation is beneficial for human teeth so that permanent teeth will not be affected by decay.
In addition, according to the lecture, high level of fluoride can induce acute or chronic toxicity. These two diseases can appear when we absorb a large amount of fluoride in a short period or accumulate it for a long time. The lecturer states that it can weaken our bone density. Plus, those who took the fluoridation water are reported that they show bone disorder. This argument challenges the reading passage that says optimal levels of fluoride are safe for people.
Lastly, the lecturer draws suspicion on the reading passage by mentioning that fluoridation water contains contaminated by harmful material such as lead or arsenic. It is said that people who are exposed to the fluoride are contaminated by lead in their blood. Moreover, he also points out dangerous level of contamination of fluoride may cause disability or crimes. This claim denies the point made in the reading passage that fluoride can be beneficial for bone growth.