() operates at a transfer rate of up to 9600 bits per second and is telephone,telex and facsimile(fax)capable.
A. INMARSAT A
B. INMARSAT C
C. SafetyNET
D. NAVTEX
生产结束时,应清理完毕传送装置上的原料再停止设备。
A. 正确
B. 错误
贯通地线在信号机房建筑物一侧每隔2m~3m用裸铜线与环形接地装置连接,两端各连接()。
A. 一次
B. 两次
C. 三次
D. 四次
Professor Smith promised to look()my paper, that is, to read it carefully before the defence.
A. on
B. after
C. into
D. over