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听力原文:How many teeth have you had filled in the past two years? If you follow the advic

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.

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更多“听力原文:How many teeth have you h…”相关的问题
第1题
听力原文:W:Hi,Mike! You missed a great history lecture this morning.Where were you?M: Oh,

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.

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第2题
听力原文:How many years has Jane been living in this place?(21)A.One year.B.Seven years.C.

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.

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第3题
听力原文:M: How many students took the exam last Friday?W: Well, fifty had registered, but

听力原文:M: How many students took the exam last Friday?

W: Well, fifty had registered, but only half of them showed up.

How many students were absent from the test?

A.15.

B.20.

C.25

D.30

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第4题
听力原文:M: How many people will be coming to the party on Saturday?W: We had to cross off

听力原文:M: How many people will be coming to the party on Saturday?

W: We had to cross off fifteen names from our original list of one hundred and fifty.

Q: How many people do they, expect to attend the party?

(19)

A.15.

B.50

C.135.

D.150

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第5题
听力原文:M: How many students passed the College English Test last term?W: Well, let me se

听力原文:M: How many students passed the College English Test last term?

W: Well, let me see. 1060 students took the exam, but half of them failed.

Q: How many students did the woman believe had passed the exam?

(18)

A.1060.

B.1016.

C.530.

D.508.

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第6题
听力原文:How many people are the victims of unclean water?(28)A.More than 70 million.B.Mor

听力原文:How many people are the victims of unclean water?

(28)

A.More than 70 million.

B.More than 2000 million.

C.More than 1000 million.

D.More than 6000 million.

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第7题
听力原文:M: How many science courses did you have in high school?W: I had only one year of

听力原文:M: How many science courses did you have in high school?

W: I had only one year of biology and chemistry. I wish I'd had more. I'm interested in physics, to be frank.

Q: How many science courses did the woman take in high school?

(17)

A.One course.

B.Two courses.

C.Three courses.

D.More than three courses.

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第8题
听力原文:W:I've heard you've traveled a lot recently.M:Yeah, many places in Africa.Q:How d

听力原文:W:I've heard you've traveled a lot recently.

M:Yeah, many places in Africa.

Q:How does the mail think of his travel?

(14)

A.Hard to say.

B.Far more interesting.

C.Exhausting and homesick.

D.Worthy of visiting again.

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第9题
听力原文:W: How many books are required for the class?M: Only three, but the instructor ha

听力原文:W: How many books are required for the class?

M: Only three, but the instructor has suggested a lot of supplementary materials.

Q: What is the probable relationship between the two speakers?

(13)

A.Librarian and student.

B.Fellow professors.

C.Fellow students.

D.Professor and student.

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第10题
听力原文:W: Can you make me a cabinet four feet high and three feet wide?M: Sure, how many

听力原文:W: Can you make me a cabinet four feet high and three feet wide?

M: Sure, how many shelves do you need?

Q: What most probably is the man's occupation?

(16)

A.Teacher.

B.Taxi driver.

C.Carpenter.

D.Shoemaker.

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