寄达地为三区的国内特快专递邮件一件,重()克,应收资费47元。
A. 800
B. 1000
C. 1500
D. 2000
查看答案
Diesel engines driving alternators operating in parallel must maintain set frequency regardless of load changesThe governor characteristic used to accomplish this is known as ()
A. actuation
B. sensitivity
C. compensation
D. thrust shaft
某一小区5个载波(不开EDGE),SDCCH=5,若采用信令压缩,压缩因子为4,那么需要()个传输设备若采用信令复用(MULTIPLEX16),那么需要()个传输设备
A. 13,10
B. 12,10
C. 11,10
D. 11,11
A preferred-channel buoy will show a().
A. white light whose characteristic is Morse (A)
B. group-occulting white light
C. composite group-flashing (2 + 1) white light
D. composite group-flashing (2 + 1) red or green light
航空运单代表货物所有权,可以通过背书转让。
A. 正确
B. 错误