A.1 B.2 C.3 D.4 E.5
A.齲病的一級(jí)預(yù)防 B.齲病的二級(jí)預(yù)防 C.齲病的三級(jí)預(yù)防 D.防止齲的并發(fā)癥 E.易感人群的特殊防護(hù)
A.10s B.30s C.60s D.2min E.5min