无先兆偏头痛不可能具有()
A.单侧性
B.波动性
C.活动后头痛
D.畏光、畏声
E.认知功能障碍
参考答案:E
下列物质中属于纯净物的是( )
A.天然气
B.乙醇汽油
C.液氧
D.生铁
The most energetic and important festivals are ______ that look forward_____ the end of winter and to the coming of spring.
A.ones; in
B.the ones; /
C.onesto
D.the ones; to