寒假期间，学生在学校所在地车站自行购买返程车票（返校）时间为（）。

A.放假前7天至放假后7天

B.放假前9天至放假后5天

C.放假前5天至放假后7天

D.放假前10天至放假后5天

To remedy a leaking fire hose connection at the hydrant，secure the valve and（）.

A.replace the gasket in the male coupling

B.reduce fire pump pressure

C.replace the gasket in the female coupling

D.rethread the male coupling