按照集团公司规定，行驶胶轮车的辅助运输巷最大坡度不超过（）度
A、8
B、10
C、12
D、14
参考答案：B
Little _____ about her own safety, though she was in great danger herself. [ ]
A. did Rose care
B. Rose did care
C. Rose does care
D. does Rose care
空中飞行情报服务的频段为（）
A.121.600—121.923MH
B.121.500MH
C.121.100—122.200MH
D.108.100—117.900MH
