家庭厨房实际上就是一个化学世界，“柴米油盐酱醋糖”等都是化学物质．请问：

（1）加碘食盐所含碘酸钾（KIO₃）中，I元素化合价是______．

（2）白糖与红糖，主要成分都是蔗糖．利用浓硫酸的______性，可将白糖逐渐炭化．

（3）食醋不慎滴在大理石台面上，会使其失去光泽，变得粗糙．这是因为食醋中的______（填化学式）与大理石发生了化学变化．

（4）我市多数家庭厨房中的“柴”将被“西气东输”工程送来的“天然气”所替代，写出天然气主要成份的化学式______．

（5）油脂的组成元素和淀粉______（填“相同”或“不同”）．

An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the models and details, include （1）, we can distribute data and processes to create a general design of application architecture. The design will normally be constrained by architecture standards, project objectives, and （2）. The first physical DFD to be drawn is the （3）. The next step is to distribute data stores to different processors. Data（4） are two types of distributed data which most RDBMSs support. There are many distribution options used in data distribution. In the case of （5）we should record each table as a data store on the physical DFD and connect each to the appropriate server.

（1）是（）

A. logical DFDs and ERD

B. ideal object model and analysis class model

C. use case models and interface prototypes

D. physical DFDs and database schema