电子枪“FIL”灯变红，故障原因是（）。
A、电子枪高压线路故障
B、真空室底下门没有关好
C、电子枪灯丝有问题
D、电子枪电流回路故障
参考答案：C
多时相图像
The managing director took the ______ for the accident, although it was not really his fault.
A. guilt B. blame C. charge D. accusation
