影响介质绝缘程度的因素有（）
A、电压作用、水分作用
B、温度作用
C、机械力作用
D、化学作用、大自然作用
参考答案：A, B, C, D
In the context of employment law and the Employment Act 1955:
(a) (i) Explain what is meant by redundancy; and (2 marks)(ii) State FOUR circumstances in which an employee may be said to have been made redundant. (4 marks)
以下单板不属于合分波子系统的是（）。
A.VMUX
B.OCI
C.SDM
D.CSUB
