RANGING OF RECEIVE A. SEND AND (62)______E-MAIL B. SOURCES (63)______FROM VAST DATABASES TO SMALL ELECTRONIC 'BULLETIN BOARDS' C. MUCH OF THE INTERNET' S TRAFFIC CONSISTS (64)______MESSAGES THE INTERNET WAS INFORMATION ON VIRTUALLY EVERY TOPI C. NETWORK USERS CAN SEARCH THROUGH (65)______, WHERE USERS FORM. DISCUSSION GROUPS AROUND COMMON INTERESTS. (66) SENT FROM ONE COMPUTER USER TO ANOTHER. THESE MESSAGES ARE CALLED ELECTRONIC MAIL OR E-MAIL. INTERNET USERS HAVE ELECTRONIC ADDRESSES THAT ALLOW THEM TO (67)______. OTHER USES OF THE NETWORK INCLUDE OBTAINING NEWS, JOINING ELECTRONIC DEBATES, AND PLAYING ELECTRONIC GAMES. ONE FEATURE OF THE INTERNET, KNOWN AS THE WORLD WIDE WEB, PROVIDES GRAPHICS, AUDIO, AND VIDEO TO ENHANCE THE INFORMATION IN ITS DOCUMENTS. THESE DOCUMENTS COVER A VAST NUMBER OF TOPICS.此题为多项选择题。