The relational database model requires the data be (110) through programs that don’t rely on the position of the data in the database. This is in direct (111) to the other database mode, where the program has to follow a series of pointers to the data it seeks. A program (112) a relational database simply asks for the data it seeks; the DBMS performs the necessary searches and (113) the information. The (114) on how the search is done are specific to the DBMS and vary from product to product.

A．accessed

B．moved

C．read

D．wrote

下列关于营业税改征增值税政策的相关表述，正确的是（）。

A.一般纳税人提供鉴证咨询服务，适用税率为6%

B.小规模纳税人提供交通运输业服务，适用税率为6%

C.境内单位和个人向境外单位提供研发和设计服务，按6%征收增值税

D.一般纳税人提供基础电信服务，适用税率为6%