属于一级预防的是
A.窝沟封闭B.根管治疗C.口腔健康教育D.预防性充填E.早期充填
参考答案:A
解析:窝沟封闭属于龋病的一级预防策略。
I can't stand ________ with Jane in the same office. She just refuses__________ talking while she works. [ ]
A. working ; stopping
B. to work ; stopping
C. working; to stop
D. to work; to stop
以下哪个标点依次为",。,,,。,。"()
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