椎动脉型颈椎病的主要临床表现是()
A．旋转性眩晕
B．头部偏向患侧
C．四肢无力
D．血压增高
E．出汗异常
参考答案：A
--Have you ever been here before?
---Well, I once _________ here for four years. Those days are really unforgettable.
A．have stayed
B．had stayed
C．have been staying
D．stayed
交叉口常用的交通组织方法有哪些？
