(来学网)进行窝沟封闭时为达到理想的粘结效果,乳牙酸蚀时间是
  • A.
    (来学网)10s
  • B.
    (来学网)30s
  • C.
    (来学网)60s
  • D.
    (来学网)2min
  • E.
    (来学网)5min
口腔预防医学