—Now, people's life in Hengyang is ______ than before.

—Yes. Many people have their own cars. [ ]

A. much better

B. less better

C. more better

女，26岁。左下后牙区胀痛不适3周。体检见面部两侧基本对称，颊侧略肿胀，扪诊有乒乓球感，局部有一瘘口，压之有少量乳白色物质溢出，临床诊断为角化囊肿

一般不宜用做下颌骨骨移植供体的供区是（）。

A．颅骨

B．肋骨

C．髂骨

D．腓骨

E．胫骨