牙列缺失多久牙槽嵴的吸收趋于稳定
A.拔牙后2~3个月 B.拔牙后3个月之内 C.拔牙后3~6个月 D.拔牙后1年 E.拔牙后2年
参考答案:E
----- John looks a bit upset. Did you tell him the bad news?
------Yes, but I _____him after his birthday party.
A.should have told
B.must have told
C.shouldn’t have told
D.needn’t have told
抹灰工程应分层进行,当抹灰总厚度大于等于35㎜时应采用()。不同材料基体交接处表面的抹灰,应采取(),当用加强网时,网与各基体的搭接宽度不应小于100㎜。