The ______ is a collection of modules serving as interface between hardware and software to provide a software platform.

A．computer

B．processor

C．application software

D．operating system

动脉粥样硬化泡沫细胞的来源是（）

A.中性粒细胞

B.淋巴细胞

C.浆细胞

D.巨噬细胞和平滑肌细胞

E.脂肪细胞