- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
乳牙窩溝封閉臨床操作的酸蝕時(shí)間是（）
A.20s
B.40s
C.60s
D.80s
E.100s
A.20s
B.40s
C.60s
D.80s
E.100s
