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  3. Which one could be the best title of the article? Teenagers and adults have had a 50% better chance of not developing tooth dec

Which one could be the best title of the article? Teenagers and adults have had a 50% better chance of not developing tooth dec

admin2009-06-24  31
问题 Which one could be the best title of the article?
Teenagers and adults have had a 50% better chance of not developing tooth decay since______.
选项 A、they started brushing their teeth more.
B、the 1960s.
C、amalgam fillings have been replaced by plastic polymer.
D、Pierre Fauchard’s book was released.
答案B
解析
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