According to the passage, what has made America’s system of higher education a great success a. Accessibility, diversity, academic freedom and centralized governance. b. Diversity, academic freedom, democracy and centralization. c. Shared governance, diversity, academic freedom and accessibility. d. Decentralization, diversity, academic freedom and shared governance.

MiniPCI的RST#信号在开机过程中会产生（）的跳变。

A.低－高－低

B.高－低－高

C.高－低－保持

D.低－高－保持