Which of the following statements concerning fluoride from fluoride-releasing materials is
A. may be elevated in saliva
B. may enhance remineralization
C. may reduce bacteria growth and acid production
D. all of the above
The strength of zinc phosphate cement is linearly related to its()
A. pH
B. powder-to-liquid ratio
C. fluoride content
D. glass content
国家、社会、学校和家庭应当教育和帮助未成年人运用法律手段维护自己的合法权益。()
A对
B错
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