如果EDCU硬件出现故障或系统存储软件丢失的话，则故障指示灯（）。
A.常亮
B.常灭
C.闪烁
D.亮灭不定
参考答案：A
A．yc=0，，zc=0，xc＞
B．yc=0，，zc=0，xc=
C．yc=0，，zc=0，xc＜
D．无法判断
—Have you heard Tom has got a promotion recently?
—Yes, he was appointed ________ as a manager last month.
