多媒体课件中的数字化音频素材一般可以通过何种方法获得（）。
A.自行制作和购买
B.上网下载
C.购买和收集
D.自行制作，收集和购买
参考答案：D
用于中性点经低电阻接地系统、保护动作切除故障在60s以内的电力电缆，其缆芯与金属套间额定电压应为( )。
A．100%
B．133%
C．173%
D．200%
Jessica Walters, CFA, is a portfolio manager and manages portfolios of a number of high-net-worth retail and institutional clients. Walters receives an allocation of oversubscribed initial public offering of a highly-speculative and risky firm manufacturing pharmaceutical. Walters allocates the stock on a pro rata basis to only those clients who are suitable for the stock according to their investment policy statements. Walters most likely violated the Standards of Professional Conduct（）
A. No.
B. Yes, relating to fair dealing.
C. Yes, relating to suitability.
