impacted tooth
参考答案：阻生牙（1分）是指由于各种原因导致只能部分萌出或完全不能萌出的牙（2分）。多见于下颌第三磨牙（1分）
A．The problem has been overdone by the media.
B．The messages the kids get make them like that.
C．The school has not done enough to help the kids.
D．Some kids are essentially violent.
在颊肌表面、咬肌前缘扪及的淋巴结是（）。
A.耳前淋巴结
B.眶下淋巴结
C.腮腺淋巴结
D.颊及颌上淋巴结
E.下颌下淋巴结
