What is the function of ultrasonic instruments?
A、
to remove small pieces of tartar
B、
to remove large pieces of tartar
C、
to polish the teeth
D、
to apply fluoride effectively
发布时间：2025-02-03 09:09:12
请在 下方输入 要搜索的题目：
B、
C、
D、
推荐参考答案 (
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答案：B
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