It is necessary for children to exchange ideas with parents from time to time so that the generation gap between parents and children can be _________.

A．released

B．replaced

C．narrowed

D．disappeared

现有技术集合在一起，开发一种新的产品，而不是单纯的模仿的是属于（）。

A、原始创新

B、集成创新

C、消化吸收再创新

D、合作创新