眶上神经阻滞进针点在（）
A.额骨眶上嵴内1/4
B.额骨眶上嵴外1/3
C.额骨眶上嵴中点
D.额骨眶上嵴内1/3
E.额骨眶上嵴切迹
参考答案：E
At last the boy had no choice but_____the bread from the supermarket. [ ]
A. admit to have stolen
B. admit having stolen
C. to admit to have stolen
D. to admit having stolen
潜水艇是重要的军事装备，如图所示，潜水艇里的观察员用潜望镜观察水面上的情况，进入观察员眼睛的光线与平面镜的夹角是
A． 90°
B． 60°
C． 45°
D． 30°
