【单选题】
A radiotelegraph message commencing with XXX has the same meaning as a message sent by the radiotelephone commencing with（）.
A、TTT
B、SOS
C、The spoken word URGENCY
D、The spoken word PAN
查看正确答案
A、MES工厂、MES车间、物料、互供点 B、MES工厂、物料、MES车间、互供点 C、MES工厂、MES车间、物料、进出厂点 D、MES工厂、物料、MES车间、进出厂点
