Internet search engines have popularized keyword based search. While relational database systems offer powerfifl structured query languages such as SQL, there is no support for keyword search over databases. The simplicity of keyword sea... S Agrawal,S Chaudhuri,G Das - ACM 被引量: 196发表: 20...
In the early 1990s,the word"Internet"was strange to most people.But today,Internet has become a useful tool for people all over the world.Maybe Internet has been the greatest invention in the field of communication in the history of mankind(人类) Communicating with others on the Internet is ...
Giving all kinds of information is probably the biggest advantage of the Internet. We can use search engines to find the information we need. Just type in a keyword or keywords and the search engine will give us a list of suitable websites to look at. We can enjoy a lot on the ...
In the early 1990s,the word"Internet"was strange to most people.But today,Internet has become a useful tool for people all over the world.Maybe Internet has been the greatest invention in the field of communication in the history of mankind(人类). Communicating with others on the Internet ...
In the early 1990s,the word"Internet"was strange to most people.But today,Internet has become a useful tool for people all over the world.Maybe Internet has been the greatest invention in the field of communication in the history of
read the e-mails within a minute. Giving all kinds of information is probably the biggest advantage of the Internet. We can use search engines to find the information we need. Just type in a keyword or keywords and the search engine will give us a list of suitable websites to look at....
In the early 1990s, the word "Internet" was strange to most people. But today, Internet has become a useful tool for people all over the world. Maybe Internet has been the greatest invention in the field of(1) B in the history of mankind (人类). Communicating with(2) D on the Inter...
50.6% (112°/74°) – Internet & Telecom 49.4% (112°/75°) – Hobbies & Leisure 49.4% (102°/68°) – Health 44.9% (105°/73°) – Finance 44.5% (116°/80°) – Beauty & Personal Care 43.0% (116°/81°) – Vehicles 39.7% (104°/74°) – Family & Community 38.0% (109...
In the early 1990s, the word “Internet" was strange to most people. But today, Internet has become a useful tool for people all over the world. Maybe Internet has been the greatest invention in the field of communication in the history of mankind(人类).Communicating with others on the ...
read the e-mails within a minute. Giving all kinds of information is probably the biggest advantage of the Internet. We can use search engines to find the information we need. Just type in a keyword or keywords and the search engine will give us a list of suitable websites to look at....