求下列两个集合的并集和交集．

（1）A={1，2，3，4，5}，B={-1，0，1，2，3}；

（2）A={x|x＜-2}，B={x|x＞-5}．

An architectural style defines as a family of such systems in terms of a （1）of structural organization. More specifically, an architectural style defines a vocabulary of（2） and connector types, and a set of （3） on how they can be combined. For many styles there may also exist one or more （4） that specify how to determine a system’s overall properties from the properties of its parts. Many of architectural styles have been developed over the years.

The best-known examples of （5） architectures are programs written in the Unix shell.

（5）是（）

A. event-based

B. object-oriented

C. pipe-and-filter

D. layered