眶下神经阻滞麻醉时，针尖人眶下孔后应向（）进入眶下管。
参考答案：后、上、外方
The train was ______ to arrive at 11:30,but it was an hour late.
A．about
B．likely
C．certain
D．supposed
三厢式轿车车身结构图主要零部件有哪些？
