—It's reported that the 29th Olympic torch (奥运火炬) is going to travel to 135 cities around the world.

—      exciting the news is! And it will arrive at the opening ceremony(开幕式)on August 8th, 2008.  [ ]

A. What    

B. How    

C. What an    

D. How an

一台计算机，开机自检时检测不到软、硬盘驱动器，致使系统无法启动，经检查确认是CMOSRAM参数丢失，重新设置后热启动，系统恢复正常，但下次开机故障依旧，后更换CMOSRAM供电电池，故障消除，但几天后故障再次发生，试判断可能的故障原因：（）

A．CMOS RAM损坏

B．CMOS RAM供电回路漏电

C．主机电源故障

D．主板内存故障