判断题

倒排文件与多重表文件的次关键字索引结构是不同的。()

答案：正确

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It is suggested in the last paragraph that the goal of MIMA is
A．to make big profits.
B．to have single themes with big appeal.
C．to bring profits to the whole town.
D．to draw as many as 110,000 visitors a year.

A.to
B.
B．to
C.
C．to
D.
D．to
E.

正规文法不能产生语言L={anbn|n≥l｝。()

答案：正确