通风网络中的三大定律是什么？
参考答案：
通风网络的三大定律是：
1.风量平衡定律
2.通风阻力定律
3.风压平衡定律
With reference to the Companies Act 1965 and relevant illustrations, explain what is fraudulent trading and the legal consequences of such fraudulent trading. In your answer state also who can be made liable as well as who can initiate legal proceedings for fraudulent trading. (10 marks)
无功功率和有功功率有什么区别？能否从字面上把无功功率理解为无用之功？为什么？
