引起牙周脓肿最常见的病原菌是
A．甲型溶血性链球菌
B．类白喉杆菌
C．无芽胞厌氧菌
D．绿脓杆菌
E．白念珠菌(白假丝酵母菌)
参考答案：C
Don’t mind too much about mistakes. They are natural part of learning.
A．不填；不填
B．the; a
C．不填; a
D．the; the
护患沟通
