颈内动脉走行的程大致为()
A.颈部垂直向上
B.在岩部的颈动脉管内水平向内
C.在破裂孔上方向前
D.在海绵窦内水平向前
E.在前床突内侧垂直向上
参考答案:A, B, D, E
Only after they had discussed the matter for a few hours ______ a decision.
A.they reached
B.did they reach
C.they reach
D.do they reach
通常情况下,原子核所带的__________电荷与核外电子所带的________电荷在数量上_______,整个原子呈_________.