在分布式数据库中有分片透明、复制透明、位置透明和逻辑透明等基本概念，其中：（ ）是指局部数据模型透明，即用户或应用程序无需知道局部使用的是哪种数据模型；（ ）是指用户或应用程序不需要知道逻辑上访问的表具体是如何分块存储的。
问题1选项
A.分片透明
B.复制透明
C.位置透明
D.逻辑透明
问题2选项
A.分片透明
B.复制透明
C.位置透明
D.逻辑透明
正确答案及解析
正确答案
解析
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