通用式机车信号提供给超防装置输出信息指标为多少?
参考答案:
直流35-60V为有效信息,小于35V为无效信息;输出信息驱动能力为12-20mA;杂音电压小于5℅。
智力测验所测量的是( )。
A.言语能力
B.数学能力
C.记忆能力
D.空间知觉
E.推理能力
Every lifeboat which is fitted with a fixed two-way()radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
A.HF
B.VHF
C.MF
D.MF/HF