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标题: 六级练习2012.06.07 [打印本页]

作者: Rebecca949    时间: 2012-6-7 17:32     标题: 六级练习2012.06.07

[audio]http://sound.yywz123.com/tingbbs/cet6/cet620120607.mp3[/audio]



How many teeth have you had filled in the past two years? If you follow the adv ice of Dr. Faustick, you may be able to reduce the number of your visits to a dentist. Dr. Faustick conducted a two-year survey to find out how to prevent or reduce dental decay. (1)_______________________.
523 students cleaned their teeth within ten minutes of eating: when possible they used a toothbrush, when this was impossible they washed their mouth thoroughly with water. (2)_____________________________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 clean after each meal group.
At the end of the second year (3)__________________________________.




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作者: riverfeng    时间: 2012-6-8 09:44

今天遇到了数字了,希望斑竹接下来几天也能出点数字的。
1、946 students take part in ..
2、The remaining students really clean
3、the last group had 53% filled decayed teeth that further group
作者: susan.sui    时间: 2012-6-8 14:10

946 students took part in the experiment.
there're mainly 423 students nearly clean their teeth
the latter group had 53% fewer decayed tooth than the former group.
作者: guangyu_    时间: 2012-6-9 16:51

答案




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