下图为一位同学的课堂笔记，记录了对某一历史事件的不同评价。据此，推断他学习的内容

如图所示的游戏中，中间同学跃起的过程中，其质量______，重力势能______．（增大、减小、不变）

我国邮政编码前两位代表（）。（1分）

（）负责人感染H7N9禽流感密切接触者的标本采集工作。

A.县级卫生行政部门。

B.疾病预防控制机构

C.临床医疗机构。

D.动物防疫中心

经营采购消毒产品时，应当索取下列有效证件：（）。

A.工商执照

B.生产企业卫生许可证复印件

C.税务登记证

D.产品卫生许可批件复印件或卫生安全评价报告

E.产品质量检验报告复印件

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 so, ware 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．quality
B．budget
C．schedules
D．risks