当牙本质因磨损、龋病暴露时,则造牙本质细胞受到程度不等的____。造牙本质细胞将发生____和继续形成____。
参考答案:损伤、变性、牙本质
I'm sorry you've been waiting so long, but it'll still be some time _______ Sundance gets back.
A.until
B.before
C.after
D.since
简述氯化氢和盐酸的性质。