题文
阅读理解。A. Causes of overusing fluoride ( 氟化物 )B. Negative effects of fluoride
C. Safe use of fluoride
D. The expert's background information
E. No need to worry about fluoride poisoning
F. Solutions to improper use of fluoride I have heard that fluoride can help stop dental decay, but I recently read that it is poisonous. Which of
these is true? How can children use fluoride safely?
1. ( )
This question is answered by Dr Marcia M. Rich who practises general dentistry in Newholt. She is also
a lecturer at the University and a writer for the monthly magazine Your Dentist Cares.
2. ( )
My answer to the first question is to stress that fluoride works well and is safe when users follow
instructions. Young children have a tendency to swallow toothpaste, which is why they should only have a
tiny amount of fluoride toothpaste on their toothbrush. If this simple measure is taken, parents can be
confident that children will be protected against tooth decay, and come to no harm.
3. ( )
Almost all medicines have a negative effect-or even be deadly-if they are not taken as directed. So you
are right-fluoride can be poisonous if it is swallowed in very large quantities. It is for the reason that fluoride
supplements can only be obtained on prescription from the doctor or dentist. Please be assured that fluoride
overdoses are rare-in fact, I have never heard of any fatal incidents related to fluoride poisoning.
4. ( )
Scientific studies have shown that fluoride can help to prevent cavities(牙洞) as long as it is used
correctly. If fluoride is abused, there is a risk of illness or even deaths in extreme cases. If a deadly amount
of fluoride is taken, immediate first-aid could save a life. A person who has swallowed a large amount of
fluoride will probably start vomiting. If not, the patient should be given milk or antacid and taken to the
nearest hospital for emergency treatment.
5. ( )
Taking too much fluoride while teeth are growing can lead to a condition called dental fluorosis. The most
likely cause is the swallowing of fluoride toothpastes by young children. It can also be caused by inappropriate
use of fluoride drop or other fluoride supplements, for example when fluoride is already present in drinking
water. 题型：未知难度：其他题型
答案
1-5: DCEFA解析
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考点
据考高分专家说，试题“阅读理解。.....”主要考查你对 [日常生活类阅读 ]考点的理解。日常生活类阅读
日常生活类阅读的概念：
日常生活这一话题主要涉及人们衣食住行等方面的活动。这一话题的选材主要针对人们日常的工作，生活以及学习情况。做这一类题时，最主要的是要把握好人物的活动内容，时间和地点。
日常生活类阅读题答题技巧：
【题型说明】
该类文章内容涉及到人们的言谈举止、生活习惯、饮食起居、服饰仪表、恋爱婚姻、消遣娱乐、节日起源、家庭生活等。文章篇幅短小，追根溯源，探索各项风俗的历史渊源，内容有趣。命题也以送分题为主，如事实细节题、语义转换题、词义猜测题和简单推理判断题等。虽然这类文章读起来感觉轻松，试题做起来比较顺手，但绝不能掉以轻心。因为稍不留神，就会丢分。
【备考提醒】
为了保证较高准确率，建议同学们做好以下几点：
1、保持正常的考试心态。笔者在教学中发现，越是容易的试题，同学们越是容易失分。为什么呢？因为在这种情况下，同学们极易产生麻痹思想，认为题目好做，就不引起高度重视，于是思维不发散、不周密。而命题人就是利用同学们的这一弱点，设计陷阱题。所以，无论试题难易与否，我们都要保持正常的考试心态。试题容易，不欣喜；试题难，不悲观。
2、根据前面讲到的方法，认认真真、细细心心做好事实细节题。
3、做好语义转换题。这类题是根据英语中一词多义和某些词语在文中能表达一定的修辞意义的原则而设计的。要求同学们解释某生词的含义，确定多义词或短语在文中的意思，确认文中的某个代词所指代的对象，或者对英语中特有的表达、格言、谚语进行解释。这种题要求同学们一定要根据上下文猜测词义或理解句子，切不可望文生义。
4、做好简单推理判断题。简单推理判断题要以表面文字为前提，以具体事实为依据进行推理，做出判断。这种推理方式比较直接，只要弄清事实，即可结合常识推断出合理的结论。
