支配上颌第三磨牙牙髓及颊侧牙龈、黏膜、骨膜的为（）
A.腭前神经
B.上牙槽前神经
C.上牙槽中神经
D.上牙槽后神经
E.鼻腭神经
参考答案：D
梭伦改革的原因、内容及意义。
Do you have any difficulty ____ these flowers? I'd like to help you if you need. [ ]
A. to plant
B. for planting
C. with planting
D. in planting
