【名词&注释】
突发公共卫生事件(public health emergency)、社会公众(public)、传染病疫情(epidemic situation of infectious diseas ...)、固定桥基牙(fixed bridge abutments)、食物中毒事件(food poisoning occurred)
[单选题]倾斜牙做固定桥基牙的最大倾斜限度是
A. 10° B. 20° C. 30° D. 40° E. 50°