世界上人口在1亿以上的国家分布最多的大洲是 [ ]
A、亚洲
B、非洲
C、欧洲
D、北美洲
答案：C
The （） has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.
A．application
B．information system
C．operating system
D．iterative
函数y=loga（x-2）-1（a＞0且a≠1）一定过点______．
