卡盘扳手“外四方”与卡盘的各“内四方”间隙超过1mm时易发生何种事故？
参考答案：间隙过大，在紧固卡盘时易打滑脱落导致人身伤害。
— Is that the country clinic you often refer to?
— Right，just the one_________you know my father used to work for 10 years
A．that
B．which
C．where
D．as
我国复式交分道岔均采用对称式转辙方式。
