口腔健康教育和口腔健康促进结合起来可以
A. 开展集体刷牙
B. 公共饮水加氟
C. 定期口腔健康检查
D. 实施窝沟封闭
E. 进行以上各项
His report from the flooded area described a(n) ___________ of desolation.
A. scene
B. array
C. manifestation
D. prospect
To secure the smoothness of the traffic, the transportation is constantly ___________ by computers.
A. monitored
B. intrigued
C. safeguarded
D. nurtured
非传染源包括
A. 急性传染病患者
B. 潜伏期感染者
C. 已知携带病原者
D. 未知携带病原者
E. 健康人群
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