首页
登录
职称英语
[originaltext] How many teeth have you had filled in the past two years? If
[originaltext] How many teeth have you had filled in the past two years? If
游客
2023-07-30
25
管理
问题
How many teeth have you had filled in the past two years? If you follow the advice of Dr. Faustick ’you may be able to reduce the number of your visits to a dentist. Dr. Faustick conducted a twoyear survey to find out how to prevent or reduce dental decay. 946 students took part in an experiment. 523 students cleaned their teeth within ten minutes of eating when possible they used a tooth brush, when this was impossible they washed their mouth thoroughly with water. The remaining 423 students merely cleaned their teeth when they went to bed and when they got up in the morning. All the students had their teeth X rayed at the end of the first and second years. At the end of the first year, the night and morning group had three times as many decayed teeth as the dean after each meal group. At the end of the second year the latter group had 53 percent fewer decayed teeth than the former group. Dr. Fausstick has cleaned his teeth after meal for thirteen years and has not had a single decayed tooth. He pointed out that sugar is a major agent in dental decay. Particularly the sugar in sweets, cakes, and soft drinks. Ideally you should keep a tooth brush in your pocket and use it immediately after you have finished eating. When this is impractical you can at least make sure that you have a drink of water and let the water through your teeth to force out any particles of food. 7 of out 10 people loose at least half of their teeth by the time they are fifty. Many have a complete set of false teeth by that time. In any case neither toothache nor a visit to a dentist is very pleas ant. So it is worthwhile making an effort to keep you own teeth as long as possible. The main preventative agent is simply water.
选项
A、He has had thirteen decayed teeth.
B、He doesn’t have a single decayed tooth.
C、He has fewer decayed teeth than other people of his age.
D、He never had a single tooth pulled out before he was fifty.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2883055.html
相关试题推荐
【B1】[br]【B11】[originaltext]Televisionnowplayssuchanimportantpartin
【B1】[br]【B10】[originaltext]Televisionnowplayssuchanimportantpartin
【B1】[br]【B9】[originaltext]Televisionnowplayssuchanimportantpartin
【B1】[br]【B7】[originaltext]Televisionnowplayssuchanimportantpartin
【B1】[br]【B6】[originaltext]Televisionnowplayssuchanimportantpartin
【B1】[br]【B3】[originaltext]Televisionnowplayssuchanimportantpartin
[originaltext]Fromthislookoutweenjoyoneofthemostspectacularviews
[originaltext]Thedoghasoftenbeenanunselfishfriendtoman.Itisalwa
[originaltext]W:Mydear,whatacharmingrestaurant!Ithassuchanoldcountr
[originaltext]W:Mydear,whatacharmingrestaurant!Ithassuchanoldcountr
随机试题
Sciencehaslonghadanuneasyrelationshipwithotheraspectsofculture.Th
[originaltext]M:(8)No.11PoliceStation.CanIhelpyou?W:Yes.It’sabout
整流滤波电路如图所示,已知U1=30V,U0=12V,R=2kΩ,RL=4kΩ,
由于原材料发生变化,或者临时他人顶班作业造成的直方图为()A.折齿型 B.左
下列关于国有土地使用权的最长期限的说法不正确的是( )A.居住用地70年 B
初孕33岁,妊40周。足先露,宫缩50秒/3~4分。胎心148次/分,先露浮。宫
经营机构发布证券研究报告,应该遵守()。 ①独立原则②客观原则 ③公平
欧式看涨期权加上相应数量的无风险资产所形成的组合可用看涨期权和一定数量的基础资
在学过正方体、长方体、拦河坝等形体的体积计算公式后,学习一般柱体的体积计算公式(
阳性强化法中,确定治疗的靶目标的原则是()。单选A.越大越好 B.越一致
最新回复
(
0
)