麻醉上颌双尖牙、磨牙腭侧牙龈、粘骨膜和牙槽骨应阻滞（）
A.上牙槽中神经
B.上牙槽后神经
C.眶下神经
D.鼻腭神经
E.腭前神经
参考答案：E
将生物现象与其所表现出来的关系用线连起来
So ______ was he in his work that he didn’t notice that it was raining hard.[ ]
A. taken
B. devoted
C. absorbed
D. interesting
