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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大学英语六级

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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

大学英语六级

Sandymadequiteanumberof(apply)______foramanagementpositionbutfailedeverytime.

So______aftershelearnedthegoodnewsthatshecouldhardlyfallasleepthatnight.

A—assemblylineJ—safetybootsB—packerK—shippingclerkC—forkliftL—timecardD—explosivematerialsM—warehouseE—fireext

A—collectiveactionI—psychologicalsupportB—competitoranalysisJ—performance-relatedpayC—corporaterestructuringK—pays

INFORMATIONSECURITYSPECIALISTNOTE:Pleasesubmityourresumedirectlythroughthiswebsite,aswellasemailingyourresu

Scientistsshouldbekept______ofthelatestdevelopmentsintheirresearchareas.

Itisimportantthathe(be)______calledbackimmediately.

Technologycompaniesusuallyfocustheiremployeebenefitsaroundmakingpeoplestayintheofficelonger:ping-pongtables,gam

Ihavealreadygiveninstructionsforthetasktobetakenupfirstandtheengineersdoingthejobtoworkovertime.

A—StudyingcertificateJ—VisaofficerB—ApplicationfeeK—EmploymentauthorizationC—Visaapplication

英国现行学制可分为下面几个系统()

关于条件反射错误的叙述是()

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牙体缺损冠修复时，恢复牙冠颊舌面外形突度的意义是

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