伟大斗争、伟大工程、伟大事业、伟大梦想是一个紧密联系、相互贯通、相互作用、有机统一的整体,统一于新时代坚持和发展中国特色社会主义伟大实践。其中,作为手段的是( )
A. 伟大斗争
B. 伟大工程
C. 伟大事业
D. 伟大梦想
A collection of interconnected networks is called an ________ or just ________.
A common form of Internet is a collection of ________ connected by a ________.
Sometimes, we can use machines called ________ to make the connection between different and incompatible networks.