通过列车必须在始发站确定并(),各车站和司机要做好乘客广播。不准两列及以上客车在()。
参考答案:通知各车站;同一车站连续通过
— How are your children in their new home?
— Fine. The good thing is that they've _____very easily to new environments.[ ]
A. used
B. belonged
C. adapted
D. turned
变频器的电压转换方式有()。
A.交流一直流一交流
B.直流一交流一直流
C.交流一直流
D.直流一交流