—I think sixteen-year-olds should be allowed to drive.

— ______. They aren’t serious enough at that age.

A．I agree

B．I disagree

C．I think so

D．That’s right

数据库技术的研究领域十分广泛，概括地讲可包括三个主要领域：DBMS软件的研制、数据库设计和 。