导向支架
参考答案：
限制管道径向位移，但允许轴向位移的支架。
___ in London, the penniless American wandered on the pavement, ___ to find a job to make a living.
A．Lost; hoped
B．Losing; hoped
C．Lost; hoping
D．Losing; hoping
独孤九剑中专破三节棍的剑式是：（）
