接发特快旅客列车时,应使列车在()通过。
A、到发线
B、侧线
C、正线
D、固定线
参考答案:C
The money collected should be made good use ________ the people in Taiwan who suffered a lot in the earthquake.
A.of helping
B.to help
C.to helping
D.of to help
如果用户定义了表关系,则在删除主键之前,必须先将______删除。