靠近铁路线路修建各种建筑物及电线路时，须经（）批准。
A、车务段
B、工务段
C、铁路局
D、铁道部
参考答案：C
外存储器又称辅助存储器，用来永久的存放大量的程序和数据。()
After driving for five hours, they arrived at they thought was the place they had been dreaming of.
A．what
B．that
C．which
D．where
