患者7岁,替牙,磨牙关系Ⅰ类,上前牙唇倾,下前牙舌倾,覆覆盖大
错的病因可能是()
A.上颌乳磨牙早失
B.舔牙
C.伸舌
D.吮拇
E.咬上唇
参考答案:D
浓缩浮选原则流程的特点是什么?
On every vessel,distress signals must be stowed().
A.on or near the navigating bridge
B.on the flying bridge not closer than 15 feet to any bulkhead
C.above the freeboard deck away from heat
D.in an enclosed space below the freeboard deck away from heat