当建筑物内有些空气调节区需全年供冷水,有些空气调节区则冷、热水定期交替供应时宜采用哪种制式的水系统()
A、两管制
B、分区两管制
C、四管制
D、两管制和四管制均可
参考答案:B
In relation to the Companies Act, 2006, explain the duty of directors to promote the success of the company, and to whom such a duty is owed. (10 marks)
某物体的质量为300g,能否用量程为5N的弹簧测力计测量它受到的重力?(用两种方法判断)