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Brushing and flossing can surely keep your teeth and gums healthy. Flossing, an essential part of the tooth-cleaning process, r
Brushing and flossing can surely keep your teeth and gums healthy. Flossing, an essential part of the tooth-cleaning process, r
admin
2009-04-23
92
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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0
大学英语六级
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