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

游客2023-09-16 61

问题 Brushing and flossing can surely keep your teeth and gums healthy. [br] Young people are more likely to have tooth decay while older people are at a greater risk for ______.

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答案 root caries

解析定位到文章中More Dental Problems标题下的第二句：Children are the most cavity prone，but adults of all ages can be affected，too．In fact，two out of three cavities in people over 50 are a result of decay around existing fillings，and most people over 60 have root caries as a result of gum diseases．(儿童最容易长蛀牙洞，但是任何年龄的成年人也不例外。事实上，在五十岁以上的人中，三个蛀牙洞中有两个是在已经填补过的牙洞周围腐蚀的，而且大多数60岁以上的人由于牙龈疾病而容易患牙根蛀牙。)题干中的more likely to是对原文中prone的解释。题干是对原文意思的概括。

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