【单选题】R1和R2为两个并联电阻,已知R1=2R2,且R2上消耗的功率为1W,R1上消耗的功率为( )
【判断题】You pass a co-worker in the hallway and he asks “How are you?”. You respond by telling him what happened bettwen you and your girlfriend/boyfriend.
【单选题】信号机开放后,该进路上的有关道岔不能扳动,其()不能开放。
【单选题】信号机开放后,该进路上的有关道岔不能扳动,其()信号不能开放。
【单选题】A co-worker shares office gossip/rumors with you. You:
A.
Thank him for telling you and pass the stories on
B.
Check out the facts with other employees
C.
Politely listen and keep the information to yourself
【判断题】信号机开放后,该进路上的有关道岔不能扳动,其敌对信号机不能开放。
【单选题】已知两个电阻R 1 和R 2 ,且R 2 =3 R 1 ,串联接入电路中,如R 1 两端的电压是3伏,则R 2 两端的电压是多少
【多选题】当进路上的有关( )未关闭时,防护该进路的信号机不能开放;信号机开放后,该进路上的有关道岔不能扳动,其敌对信号机不能开放。