哪些情况属于占用区间?
参考答案:
1、闭塞区间已进入列车或已停留或溜入机车、车辆等;
2、封锁的区间(如安排进行施工作业等);
3、闭塞区间已被列车取得占用的许可。
I'll ___ the matter as soon as possible. Just have a little patience.
A.divide up
B.look into
C.take its place
D.look at
质量文件一般为楼式结构,由二、三层或四层文件组成。()