2. 职称英语
  3. Brushing and flossing can surely keep your teeth and gums healthy. [br] Receding

Brushing and flossing can surely keep your teeth and gums healthy. [br] Receding

游客2023-09-16  18
问题 Brushing and flossing can surely keep your teeth and gums healthy. [br] Receding gums is often the result of hard tooth brushing.
选项 A、Y
B、N
C、NG
答案 A
解析 定位到文章标题Tips on Proper Brushing下第一条建议末句：Brushing too hard can cause receding gums，tooth sensitivity．and，over time，loose teeth．(刷牙时用力过猛会造成牙龈萎缩，牙齿过敏，而且久而久之会造成牙齿脱落。)由此可判断，牙龈萎缩常常是由于刷牙过猛造成的。题干与原文内容相符合。
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