锥销孔ф5，其中ф5是与锥销孔相配的圆锥销（）直径。
A.大头
B.小头
C.中间
D.平均
参考答案：B
Do you know _____? [ ]
A. when the train leaves the station
B. when does the train leave the station
C. when will the train leave the station
明确浅表脓肿的主要依据是
A．局部明显压痛B．局部明显红肿C．局部有热感D．局部有波动感E．功能障碍
