枕神经痛可向上放射至同侧颞部、额部，甚至眼眶及耳前区，向下可至颈部。
参考答案：对
It was sunny in the morning. ______, it rained in the afternoon. [ ]
A. So
B. Because
C. If
D. However
当传输网中断时，车站子系统如何自保护。
