飞行中遭遇何种情况将导致紧急撤离()
A.机上有危在旦夕的病人
B.机上有早产的孕妇
C.货舱或发动机起火
D.客舱释压,紧急下降
参考答案:C
Italians often approach others closely and are more to touch them.
A.maybe
B.possible
C.likely
D.probably
客货共线铁路,速度小于等于120km/h的区间双线,线间最小距离规定为()。
A.5500mm
B.5300mm
C.5000mm
D.4000mm