【单选题】若忽略同步发电机的电枢电阻,则发电机的电磁功率与其输出功率()。
【单选题】若忽略同步发电机的电枢电阻,则发电机的电磁功率与其输出功率()
【单选题】Which sentence is not in the past continuous?
A.
Ana moved to California in 1995.
B.
Emi and Jin were studying in the library last night.
C.
Sam wasn't waiting for me at the airport.
【简答题】在解除双线半自动闭塞后,接车站半闭组合中()继电器吸起。
【单选题】单线半自动闭塞,列车整列到达,接车站按下复原按钮后,发车站的发车表示灯和接车站接车表示灯的显示为( )。
【单选题】Which sentence is not talking about the future?
A.
Ana and her friends are going to visit her brother this weekend.
B.
Emi is studying a lot these days.
C.
Luis and Susan will be at the meeting on Friday.
【单选题】单线半自动闭塞,发车站按下闭塞按钮后,发车站的发车表示灯和接车站接车表示灯的显示为( )。
【简答题】半自动闭塞车站应根据闭塞机闭塞表示灯、《行车日志》和各种 ,确认区间空闲。A. 行车表示牌
【单选题】钢筋混凝土构件中,正常环境下梁和柱钢筋的保护层厚度应为( )。