保护环境是我们每一个人的义务．下列行为中，有利于环境保护的是（　　）

①将废旧电池回收利用  ②推广使用乙醇汽油  ③尽量使用可降解塑料  ④不用含磷洗衣粉  ⑤工业废水直接排放到长江中  ⑥合理使用农药和化肥．

A．①②③④⑥

B．②③⑤⑥

C．①②③④⑤

D．②③⑤

The software architecture of a program or computing system is the structure or structures of the system, which comprise software ______, the externally ______properties of those components, and the relationships between them.The architecture is not the operational software. Rather, it is a ______ that enables a software engineer to: analyze the ______ of the design in meeting its stated requirements, consider architectural alternatives at a stage when making design changes is still relatively easy, and reduce the ______ associated with the construction of the software.

A. qualityB. budget C. schedules D. risks