同等学力申硕英语模拟试题及答案(2)The Internet had its __7__ in a 1969 U
Defense Department computer network called Arpanet, which __8__ Advanced Research Projects Agency Network
The Pentagon built the network for military contractors and universities doing military research to __9__ information
In 1983 the National Science Foundation (NSF), __10__ mission is to promote science, took over
This new NSF network attracted more and more institutional users, may of __11__ had their own internal networks
For example, most universities that __12__ the NSF network had intercampus computer networks
The NSF network then became a connector for thousands of other networks
__13__ a backbone system that interconnects networks, internet was a name that fit
So we can see that the Internet is the wired infrastru