Xiang Li, CFA, deputy treasurer for BBB College, manages the Student Scholarship Trust. Li issued a Request for Proposals (RFP) for domestic equity managers. Gong Cheng, CFA, a good friend of Li, introduces him to representatives from Capital Investments, who submitted a proposal. Li selected Capital as a manager based on the firba’s excellent performance record. Shortly after the selection, Cheng, who had outstanding performance as an equity manager with another firm, accepted a lucrative job with Capital. Have Li and Chen, respectively, violated any CFA Institute Standards of Professional Conduct . LiChen（）①A. NoNo ②B. NoYes ③C. YesNo

A. ①

B. ②

C. ③

如图所示,弹簧下端挂一质量为m的物体,物体在竖直方向上做振幅为A的简谐运动,当物体振动到最高点时,弹簧正好为原长,则物体在振动过程中

A．物体在最低点时的弹力大小应为2mg

B．弹簧的弹性势能和物体动能总和不变

C．弹簧的最大弹性势能等于2mgA

D．物体的最大动能应等于mgA