The ( ) is the physical computer system that allows access to data.
A. hardware
B. software
C. data
D. users
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A distributed database can be classified either as a [填空1] distributed database or as a [填空2] distributed database. Of the two databases, [填空3] is more secure than the other one.
There are three levels in the DBMS architecture. Among them, [填空1] level is to interact with users directly, [填空2] level is to interact with hardware directly, and query is on [填空3] level.
Before the emergence of databases, what was the traditional way of data storage?
汽车销售的活动的出发点和立足点是()
A. 一切以服务为宗旨
B. 建立汽车销售企业新形象
C. 高效率的实现销售目标
D. 满足客户需求,实现企业目标