多项选择题
A.Massachusetts Institute of Technology
B.Harvard
C.1978
D.Stanford
E.1991
F.California Polytechnic Institute
G.1984
H.1996
多项选择题 Which three of these are benefits of telepresence and video collaboration?（）
单项选择题 Wide Area Network (WAN) is a computer network that covers a broad areA. Which statement is correct for wide-area network (WAN)?（）
单项选择题 Which WLAN device is often used to make wireless connections between buildings or campuses?（）