Fortunately, with the help of some local villagers, rescuers were able to gain ________ to the disaster-hit area soon enough.

A．track

B．access

C．means

D．passage

安全钳间隙小，电梯运行时楔块与导轨产生摩擦轿厢内会听到金属摩擦声，也会产生晃动。