FTGS-917型轨道电路与国内的轨道电路最大的区别就是:实现的方式不同。国内的轨道电路是采用机械绝缘节来划分区段,而是使用电气绝缘节来划分区段的
参考答案:FTGS
At ____ present we are going through a hard time, but I’m sure ____ things will get better in the near future.
A.the; the
B.the; 不填
C.不填; the
D.不填; 不填
丁卡因脊麻的起效时间()
A.1~2min
B.3~4min
C.5~9min
D.10~15min
E.20min以上