听力原文: How many teeth have you had failed in the past two years? If you follow the advi
According to the passage ,what type of food/drink is most likely to cause dental decay?
A.Coca Cola
B.Sausage.
C.Milk.
D.Fried chicken.
According to the passage ,what type of food/drink is most likely to cause dental decay?
A.Coca Cola
B.Sausage.
C.Milk.
D.Fried chicken.
第1题
听力原文: 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.
(23)
A.Coca Cola.
B.Sausage.
C.Milk.
D.Fried chicken.
第2题
听力原文:W:Hi,Mike! You missed a great history lecture this morning.Where were you?
M: Oh, I overslept again. This really is becoming a bad habit. What did Professor Brown talk about today?
W: Can you believe it? We talked about George Washington's false teeth.
M: All I know is that they were made of wood.
W: A professor at a dental school in California recently presented a paper showing that Washington's teeth were made of many things, including, can you imagine, elephant ivory and cow's teeth, but not wood.
M: But why do people say Washington's teeth were made of wood?
W: A set of his teeth that were made of elephant ivory were shown publicly at various exhibitions about a hundred years ago. The ivory had turned a very dark color, and I guess, looks like wood.
M: Yes, I've seen some ivory that was dark brown color.
W: It seems that ivory turns dark easily with age, especially if it's exposed to drinks, such as coffee, tea, or wine. I guess that's how the story got started.
M: What's about cow's teeth?
W: You know cows have teeth just on their bottom jaws. After about five years of biting grass off against their hard up- per jaws, the bottom teeth wear down into the shape of a human tooth.
(23)
A.A student and a professor.
B.Two students.
C.Two dentists.
D.A dentist and a patient.
第3题
听力原文:W: I've seen the X-rays and your teeth look just fine.
M: I see. Then there's nothing to worry about after all.
How does the man probably feel now?
A.Relieved.
B.Worried.
C.Concerned.
D.Indifferent.
第4题
听力原文:How many nights will you stay?
(12)
A.Sorry.
B.You know.
C.I will stay for three nights.
第5题
听力原文:How many pages are in the book?
(A) He's six years of age.
(B) All the pages are white.
(C) There are about three hundred pages.
(36)
A.
B.
C.
第6题
听力原文:How many years has Jane been living in this place?
(21)
A.One year.
B.Seven years.
C.Four years.
D.Six years.
第7题
听力原文:W: How many storybooks do you have, Mike?
M: Five.
Q: How many storybooks does Mike have?
(22)
A.Six.
B.Five.
C.Four.
第8题
听力原文:How many people have responded to our advertisement?
(A) For the new ad, on page 3.
(B) He's heard it already.
(C) At least 25, I hear.
(13)
A.
B.
C.