If you can't get to sleep, then get up and try to do something_______ lying in bed.[ ]

A.and      

B.or    

C.instead of      

D.take the place of

填料式补偿器活动侧管道的支架应为( )，使管道不致偏离中心线，并保证能自由伸缩。

A．连接支架
B．固定支架
C．输送支架
D．导向支架