一定量的药物及适当的辅料制成均匀的粉末或颗粒，填装于空心硬胶囊中而制成的是（）

A．成囊材料 

B．增塑剂 

C．遮光剂 

D．防腐剂 

E．增稠剂

The software architecture of a program or computing system is the structure or structures of the system, which comprise software （11）, the externally （12） properties of those components, and the relationships between them. The architecture is not the operational software. Rather, it is a （13） that enables a software engineer to: analyze the （14） 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 （15） associated with the construction of the software.

（12）处填（）。

A. visible

B. reliable

C. secure

D. robust