计算机只要是感染上病毒，计算机的工作（）
A.肯定会受到病毒干扰
B.肯定会停止
C.肯定会变慢
D.不一定受到干扰
参考答案：D
电力电缆的耐压试验是破坏性试验，必要时可以酌量（）试验电压。
A.提高
B.降低
C.不变
D.调整
Which of the following statements is NOT true of nuclear plants in Britain
A．They have caused a series of power failures recently.
B．They have betrayed trust of the general public.
C．They need improvement in management.
D．They demand promotion of security awareness.
