--Could you tell me how I can get to the nearest park?

--______ down this street and turn left ______ the second crossing.

A．Go; in

B．Go; at

C．Going; on

D．To go; of

下列哪些应急设备是由化学氧气发生器供氧的（）

A.手提氧气瓶

B.客舱氧气系统

C.防护式呼吸装置

D.驾驶舱供氧