The Healthy Habits Survey(调查)shows that only about one third of American seniors have corr

The Healthy Habits Survey(调查)shows that only about one third of American seniors have correct habits.Here are some findings and expert advice.
1．How many times did you brush your teeth yesterday?
●Finding：A full 33% of seniors brush their teeth only once a day.
●Step：Remove the 300 types of bacteria in your mouth each morning with a battery­operated toothbrush.Brush gently for 2 minutes，at least twice a day.
2．How many times did you wash your hands or bathe yesterday?
●Finding：Seniors，on average，bathe fewer than 3 days a week.And nearly 30%wash their hands only 4 times a day－half of the number doctors recommend.
●Step：We touch our faces around 3,000 times a day－often inviting germs(病菌)to enter our mouth，nose，and eyes.Use toilet paper to avoid touching the door handle.And，most important，wash your hands often with hot running water and soap for 20 seconds.
3．How often do you think about fighting germs?
●Finding：Seniors are not fighting germs as well as they should.
●Step：Be aware of germs.Do you know it is not your toilet but your kitchen sponge(海绵)that can carry more germs than anything else？To kill these germs，keep your sponge in the microwave for 10 seconds.
【小题1】What is found out about American seniors?A．Most of them have good habits.B．Nearly 30% of them bathe three days a week.C．All of them are fighting germs better than expected.D．About one third of them brush their teeth only once a day.【小题2】Doctors suggest that people should wash their hands .A．twice a day B．three times a day C．four times a dayD．eight times a day【小题3】Which of the following is true according to the text?A．We should keep from touching our faces.B．There are less than 300 types of bacteria in the mouth.C．A kitchen sponge can carry more germs than a toilet.D．We should wash our hands before touching a door handle.【小题4】The text probably comes from .A．a guide book B．a popular magazine C．a book review D．an official documentD

(答案→)D 解析：本文为一篇信息材料类说明文。文章介绍的是一个对美国老年人进行的健康习惯的调查结果以及专家给出的对策。【小题1】解析：选D。细节理解题。根据文章内容可知，美国老年人多数没有好的习惯，故A项错误。30%是每天洗4次手人数的比例，而不是每周洗澡三天人数的比例，故B项错误。根据第三个问题下Finding的内容“Seniors are not fighting germs as well as they should.”可知C项错误。根据第一个问题下Finding的内容“A full 33%of seniors brush their teeth only once a day.”可知D项正确。【小题2】解析：选D。推理判断题。根据wash their hands可锁定第二个问题下的内容，根据“And nearly 30% wash their hands only 4 times a day－half of the number doctors recommend.”可知，每天洗手四次只是医生建议的一半，由此可推知，医生建议的次数是每天8次。故选D项。【小题3】解析：选C。细节理解题。文章只是建议老年人要勤洗手，因为手每天接触脸约三千次，然后接触口、鼻、眼睛，这样就会将细菌带到这些部位，显然，问题的症结是避免未洗净的手接触口、鼻、眼睛等易被细菌感染的部位，而不是脸部，故A项不正确；B项中的less than 300与第一个问题下“Remove the 300 types of bacteria in your mouth...”有出入，故B项不正确；根据第二个问题下的“Use toilet paper to avoid touching the door handle.”可知，问题在于门把手上有大量细菌，会传到手上，而不是手上的细菌传到门把手上，故D项也不合适。根据最后一段中的“Do you know it is not your toilet but your kitchen sponge(海绵)that can carry more germs than anything else？”可知C项正确。【小题4】解析：选B。推理判断题。本题要求判断文章的出处，此类试题一般结合文章的内容和格式综合考虑。本文显然不是书评(a book review)，也不是官方文件(an official document)。A项有较强的干扰性，但本文主要是面向公众的科学知识普及，而不是生活指引。故选B项。

我明天再问问老师，叫他解释下这个问题