继电集中联锁系统的可靠性保障主要从哪两方面出发:()
A、应用高可靠性的设备元件
B、使用昂贵的设备元件
C、在系统设计中采用避错技术
D、在系统设计中采用容错技术
参考答案:A, D
Considering your salary, you should _______ at least 100 dollars a week.
A.put up
B.put forward
C.put aside
D.put out
In relation to contract law, explain the following:
(b) Past consideration is not valid consideration. (4 marks)