LAI是在什么信道上发送的?()
A.PCH
B.BCCH
C.RACH
D.SCH
参考答案:B
The big fire lasted as long as 24 hours ______it was brought under control. [ ]
A. after
B. before
C. ahead
D. since
在Windows98的资源管理器中,要选中一个文件夹中的所有内容中使用的快键是()。
A.CTRL+S
B.ALT+S
C.CTRL+A
D.ALT+A