说明调速系统调节品质好坏的两个重要指标是速度变动率和迟缓率.
参考答案:对
把多项式a(x-y)+b(y-x)分解因式的结果是( )
A.(a-b)(x-y)
B.(a+b)(x-y)
C.(a+b)(y-x)
D.(a-b)(y-x)
In relation to employment law:
(a) Explain the circumstances in which it may be appropriate for an employer to enter into a fixed term labour contract with an employee. (4 marks)