14.It has become a certain belief among the public----drink at least eight glasses of water a day to improve health and wellbeing.Bottled water companies often repeal it to increase their sales but it is actually a silly idea.There is no evidence to prove the advantages of drinking eight glasses of water a day,scientists say.
The misunderstanding is caused from the suggestion that adults should drink 2.5 liters of water daily,which was stressed by the British Medical Journal in December.The important part of the suggestion that most of this quantity of water is contained in prepared foods,however,is usually ignored.
US researchers who reviewed the evidence concluded that most people do not need to worry about the amount of water they drink every.day.Besides drinking water,they will be getting plenty of liquid(液体)in other ways.Caffeinated drinks such as tea,coffee and cola and alcohol(酒)can help reach the daily total if they don't drink too much,though these drinks help the production of urine (尿).Less well known arc the dangers of drinking too much water,causing water poisoning,low salt levels and even death.
The review of research by Dan Negoianu,from the University of Pennsylvania,found that not a single study included the suggestion of drinking eight glasses of water a day.Although one small study suggested that drinking water could result in fewer headaches,the results were not very important.However,the benefits of drinking some water to prevent a pain in head after drinking too much alcohol are,separately,proved to be true.
No studies showed any advantages to the color of the skin because of the increased water taken into bodies.Dehydration(脱水)can make skin less pleasant,but there was no clear evidence to support the idea that water helps people keep a youthful appearance.The researchers also found no evidence that drinking lots of water does some good to the body's organs(器官).
28.From the passage,we know that the suggestion about drinking eight glasses of water a dayC.
A.causes some serious diseases
B.has enough scientific evidence to support it
C.is misunderstood by people in fact
D.was published by the British Medical Journal
29.From the passage we learn that many people don't know thatD.
A.the production of urine can cause water to lose
B.health can be improved by drinking plenty of'water
C.better skin can result from intake of much water
D.caffeinated drinks can provide the water people need
30.What can be proved about drinking a lot of water according to the passage?A
A.Reducing the bad influence of drinking alcohol.
B.Helping to keep youthful looks.
C.Making the body's organs stronger.
D.Causing bad headaches.
31.The writer's main purpose of writing this passage is toB.
A.persuade people to drink different kinds of water
B.tell people drinking much water is not as healthy as is considered
C.warn people of the danger of drinking much water
D.help people realize the importance of drinking enough water every day.
分析 文章主要以研究结果来告诉人们"每天喝八杯水来保持健康"是一种误导性的认识,没有证据表明"每天喝八杯水"有什么好处,相反饮水过多会带来水中毒、低盐甚至是死亡的危险.
解答 28-31.CDAB
28题答案:C 考查细节推理,根据文章第一段最后一句的"There is no evidence to prove the advantages of drinking eight glasses of water a day,scientists say."(科学家说没有证据来证明每天喝八杯水的好处)可知本题答案为C选项.
29题答案:D 考查细节推理,根据文章第三段的"…most people do not need to worry about the amount of water they drink every.day.Besides drinking water,they will be getting plenty of liquid(液体)in other ways.Caffeinated drinks such as tea,coffee and cola and alcohol(酒)can help reach the daily total if they don't drink too much…"(…大多数人没必要担心他们每天喝水的量.除了喝水,他们还能用其它方式得到大量的液体.诸如茶、咖啡、可乐及酒这样的含咖啡因饮料能帮助人们达到日常所需的总量--前提是不要过度饮用)可知本题答案为D选项.
30题答案:A 考查细节推理,根据文章倒数第二段的"However,the benefits of drinking some water to prevent a pain in head after drinking too much alcohol are,separately,proved to be true."(然而饮酒过多之后喝一些水来防止头疼却例外地被证明是真的)可知本题答案为A选项.
31题答案:B 考查文章大意,文章主要以研究结果来告诉人们"每天喝八杯水来保持健康"是一种误导性的认识,没有证据表明"每天喝八杯水"有什么好处,相反饮水过多会带来水中毒、低盐甚至是死亡的危险,故本题答案为B选项"告诉人们多喝水并没有它被认为的那样健康".
点评 本文是一篇科教类阅读,题目涉及多道细节理解题,做题时结合原文和题目有针对 性找出相关语句进行仔细分析,结合选项选出正确答案.推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案.