()为外壳防尘密、防喷水型电器设备
A.IP54
B.IP65
参考答案:B
24岁女性,因右上颌后牙肿痛就诊。查右上第一前磨牙龋,深,探(-),松(Ⅱ),叩痛(+++),龈红肿,扪根尖处疼痛,有波动感。诊断最可能是
A.慢性根尖脓肿
B.急性化脓性牙髓炎
C.急性上颌窦炎
D.急性颌骨骨髓炎
E.急性牙槽脓肿
The children remembered to ______ themselves at first, but things went out of control minutes later.
A.produce
B.behave
C.practice
D.enjoy