窝钩封闭中乳牙的酸蚀时间为A.40s B.10s C.60s D.20s

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问题 窝钩封闭中乳牙的酸蚀时间为A.40sB.10sC.60sD.20sE.2min

选项 A.40s
B.10s
C.60s
D.20s
E.2min

答案 C

解析
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