到达牙冠表面形成釉面横纹的是（）。
A.釉质生长线
B.釉板
C.釉丛
D.釉梭
E.绞釉
参考答案：A
This book is very ___________ and I am ___________ in it.
A．interesting; interested
B．interesting; interest
C．interested; interesting
D．interested; interested
狼毫毛笔
