【单选题】一送多受轨道电路最多 不应超过( )受电端
【单选题】听力原文:W: I'd like to book a ticket to New York for this Friday. M: Just a second. W: I'll need a return-ticket. M: SDL has a flight leaving at 8:15 a. m. W: That's OK. What time shall I check in? M: Yo...
【简答题】详述吞咽器官运动训练中呼吸训练的目的和具体方法。
【简答题】second-class ticket (翻译)
【简答题】道岔区轨道电路的特点是增设了( )、( )和一送多受轨道电路。
【单选题】The second passenger bought the train ticket to depart at:
A.
11 o'clock in the morning
【判断题】一送多受轨道电路最多可以超过三个受电端,必要时应分为两个轨道电路。
【简答题】second -class ticket
【单选题】25HZ轨道电路中,一送一受和一送多受轨道电路的电压调整余量K应()