All Loran-C transmitting stations are equipped with cesium frequency standards which permit ().
A. every station in one chain to transmit at the same time
B. each station to transmit without reference to another station
C. on-line transmission of single-line transmitters at the same time
D. each station to only depend on the master for synchronization and signal ratio
查看答案
已知:B点的电位为5伏,AB两点之间的电压UAB=+10V,则A点的电位为()V。
A. 5
B. 15
C. +10
D. -15
作业完成后,要仔细检查服装,如有玷污或破损,需要()装箱入库以备下次使用
什么是焊接电源外特性?焊接电源外特性的类型,如何与焊接电源静特性相匹配?
医院人力资本是指在医疗服务过程中用于补偿自身劳动力再生产的必要劳动。()
A. 正确
B. 错误