“良言一句三冬暖，恶语伤人六月寒”这句话说明了[ ]

①在待人接物中，语言有明显的高下、美丑之别，它所产生的心理效应也有天壤之别 ②文明用语使人际交往和谐，为人际关系增色 ③与人说话要和气，不要恶语伤人，谈吐要文雅，不要说粗话 ④礼貌文明的语言，能让人感到暖意融融

A、①②③

B、②③④

C、①②④

D、①②③④

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. changeability B. effectiveness C. testability D. functionality