Shy-Drager综合征病因是()
红斑肢痛症病因是()
雷诺病病因是()

A．小动脉痉挛

B．中小动脉痉挛

C．小动脉扩张

D．脊髓侧角细胞变性

E．交感神经节变性

The villagers who suffered flood are____________food and clothes.      [ ]

A. in need                  

B.in want      

C.in want of                

D.in hope