单项选择题

A. extention B. the same C. common D. panicularDBMS wil……

在Excel表处理中，假设单元格A1=1，A2=1.5，选择A1:A2单元格区域，并将鼠标指针指向该区域右下角的填充柄，拖动至A8单元格，则A8=______；之后，在单元格B1中输入公式“=SUM(A1:$A$8)”，则B1所显示的内容是______。DBMS will "manage" the stored data items and assembIe the needed items from the ______ databasein response tO the querieS of those who aren’t pmgrammers.

A. extention
B. the same
C. common
D. panicular

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单项选择题______ is a device which enables digital microcomputers to communicate across analog telephonelines．

A. The switch
B. The modem
C. The hub
D. The repeater

单项选择题On a ______ memory system, the logical memory space available to the program is totallyindependent of the physical memory space.

A.cache
B.EPROM
C.virtual
D.SRAM