Brushing and flossing can surely keep your teeth and gums healthy. Flossing, an essential part of the tooth-cleaning process, r

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问题 Brushing and flossing can surely keep your teeth and gums healthy.
Flossing, an essential part of the tooth-cleaning process, removes plaque between teeth and at the gumline, the breeding ground for ______.

选项

答案volatile sulfur compounds

解析 定位到Facts on Flossing标题,首段第三句Sometimes,the bacteria break down the food particles and create volatile sulfur compounds.For this reason you’ll need to floss these spaces at least once a day.(有时,细菌分解食物残渣,产生易挥发的硫化合物。因此,你至少需要每天用牙线清洁这些地方。)由此可得出答案。
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