The new group of students is better-behaved than the other group who stayed here ________.

A．early

B．earlier

C．earliest

D．the earliest

新生儿，诊断为完全性唇、腭裂

最先实施的手术治疗是（）.

A.唇裂修复术

B.腭裂修复术

C.牙槽突植骨术

D.正畸治疗

E.以上都不是