在磨牙髓腔，自髓底至根分叉处的管道是（）
A.管间吻合
B.根管侧支
C.根尖分歧
D.根尖分叉
E.副根管
参考答案：E
"Ah, when? God knows." He said, and ________ away from her, walked rapidly away. [ ]
A. turning
B. turned
C. turn
D. to turn
简述慢性根尖周炎。
