The main advantage of a circular list is that（）
A. can traverse the entire list from any point in the table
B. no longer requires head pointers
C. when knows the location of a node，it can easily find its direct predecessor
D. in the delete operation，to ensure that the list continues to open
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In data structures，logically，data structures can be divided into（）
A. dynamic structure and static structure
B. internal structure and external structure
C. compact structure and non-compact structure
D. linear structure and nonlinear structure
Which of the following about the BBC is NOT true（）
A. The BBC is run under a Royal Charter since its establishment
B. Today the BBC provides more radio broadcasting than television output
C. The BBC provides not only national broadcasting service but also world service
D. The BBC is a private corporation
Who had ever the only control of the airwaves in the UK EXCEPT（）
A. General Post Office
B. the British Broadcasting Company
C. the British Broadcasting Corporation
D. the British government
“Blood, Toil, Tears and Swear” was delivered by Winston Churchill during ______（）
A. the First World War
B. the Second World War
C. the Battle of Trafalgar
D. the Battle of Waterloo
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