广域网
参考答案：
是将地理位置相距较远的多个计算机系统或局域网通过通信线路互联从而实现数据通信的网络。
I don't think he could have finished his work last night, ________? [ ]
A. do I
B. did he
C. has he
D. could he
12对脑神经中在颅中窝中行程最长的是（）。
A.外展神经
B.视神经
C.三叉神经
D.动眼神经
E.面神经
