牵引网存在容性、感性和阻性三大耦合，这三大耦合的干扰源分别是：（）
A.电压、电流、走行轨
B.走行轨、电流、电压
C.电流、电压、走行轨
参考答案：A
(a) IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors contains guidance on the use of accounting policies and accounting estimates.Required:Explain the basis on which the management of an entity must select its accounting policies and distinguish, with an example, between changes in accounting policies and changes in accounting estimates. (5 marks)
农村社会群体的含义
