牙周基础治疗后牙龈增生仍明显
A.引导性组织再生术+植骨术B.改良Widman翻瓣术C.根向复位瓣术D.截根术E.牙龈切除术 下列情况采取的最佳术式是
参考答案:E
氢气、甲烷(CH4)、水各1g,其中含分子数最多的是______;含氢原子最多的是______.
Alice is so careful that she always goes over her test papers to ____ there are no mistakes.[ ]
A. look for
B. make sure
C. find out
D. think about