I wonder why you don’t do it as ______ and it’s the third time you have done so.

A．told you

B．be told

C．told to

D．you told

如果未按常规程序进行塑料热处理操作，结果义齿基托会出现"花基板"，且发生变形，密合度差

常规热处理方法是（）

A.100°恒温2h

B.100°恒温20min

C.70°恒温24h

D.70°恒温1.5h，100°恒温1h

E.60°恒温12h