滑差电动机自动调速线路中，比较放大环节的作用是将反馈电压与给定电压比较后，输入给晶体

光缆接续的要求是什么？

简述唐律规定的封建官吏的特权原则。

Ari operates a business as a designer of internet web pages for a variety of business clients. Unfortunately he has had some difficulty in recovering his full fees from a number of clients as follows:(a) Bi, a newly qualified accountant, told Ari that although she could only raise the cash to pay half of the outstanding fees she would, as an alternative to paying the other half, do all of Ari’s accountancy work for the coming year. Ari reluctantly agreed to this proposal.(b) Cas, a self-employed musician, told Ari that she could not pay any of the money she owed him. However, her father offered to pay Ari, but could only manage half of the total amount owed. Once again Ari reluctantly agreed to accept the father’s payment of the reduced sum.(c) Dex, a self-employed car mechanic, without contacting Ari, simply sent him a cheque for half of his fees stating that he, Dex, could not pay any more and that the cheque was in full settlement of his outstanding debt.Ari himself is now in financial difficulty and needs additional cash to maintain his business operation.Required:Advise Ari whether, in the context of contract law, he can recover any of the outstanding money from Bi, Cas and Dex. (10 marks)

根据《国家电网公司施工项目部标准化工作手册330kV及以上变电工程分册》，下列（）属于线路施工项目部在施工准备阶段质量管理工作的内容。

A.对施工过程中所选用的特殊工种和特殊作业人员资格进行报审

B.施工现场使用的计量器具、检测设备，建立台账，并报审

C.对施工过程中所拟用的分包单位和试验室，将其资质进行报审

D.组织工艺示范基（件）和首例（件）试点，确认后进行推广